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== Product Overview ==
== Product Overview ==
The LIGO PRO fuel level sensor represents a significant advancement as a third-generation product, having undergone extensive mechanical refinements to enhance both performance and durability. These improvements enable the sensor to better cope with issues such as water resistance and electrical insulation, especially compared to its predecessors. Notably, this product adheres to the highest standards of water and chemical resistance, including its ability to withstand water ingress according to the IP69K standard.
The LIGO PRO fuel level sensor represents a significant advancement as a third-generation product, having undergone extensive mechanical refinements to enhance both performance and durability. These improvements enable the sensor to better cope with issues such as water resistance and electrical insulation, especially compared to its predecessors. Notably, this product adheres to the highest standards of water and chemical resistance, including its ability to withstand water ingress according to the IP69K standard.


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# High accuracy up to 99.5%.
# High accuracy up to 99.5%.
# Operating input voltage range from 7 V – 50 V.
# Operating input voltage range from 7V-50V
# Internal isolation voltage up to 2500 V.
# Internal isolation voltage up to 2500V.
# Possibility of cutting down or extending up to 6000 mm (optional).
# Possibility of cutting down or extending up to 6000mm (optional)
# Wide operating temperature range from −40 °C to +85 °C.
# Wide operating temperature range from -40°C to +85°C.
# A filter protecting the probe from dregs and water.
# A filter protecting the probe from dregs and water.
# Ingress protection rating IP69K.
# Ingress protection rating IP69K
# Noise filter and temperature compensation system.
# Noise filter and temperature compensation system.
# Installation and configuration software on multiple application devices: phone, laptop, etc.
# Installation and configuration software on multiple application devices: phone, laptop, etc.
Line 33: Line 34:
=== LIGO PRO Order Code ===
=== LIGO PRO Order Code ===


For example: 700 mm length, output signal AF sensor has the order code '''LIGO PRO – AFL7'''.
For Example: 700mm length, output signal AF sensor has the order code: '''LIGO PRO - AFL7'''


{| class="wikitable" style="text-align:center;"
{| class="wikitable" style="text-align:center;"
|-
|-
! Code !! Description
! Code !! Description !! Code !! Description
|-
| AF || style="text-align:left;" | Analog (0…9 VDC) / Frequency 500…2000 Hz
|-
| RS232 || style="text-align:left;" | RS232
|-
| RS485 || style="text-align:left;" | RS485
|-
|-
| L7 || style="text-align:left;" | 700 mm
| AF || style="text-align:left;" | Analog (0…9VDC) || L7 || style="text-align:left;" | 700mm
|-
|-
| L10 || style="text-align:left;" | 1000 mm
| || style="text-align:left;" | Frequency 500…2000Hz || L10 || style="text-align:left;" | 1000mm
|-
|-
| L15 || style="text-align:left;" | 1500 mm
| RS232 || style="text-align:left;" | RS232 || L15 || style="text-align:left;" | 1500mm
|-
|-
| Other length || style="text-align:left;" | Contact manufacturer
| RS485 || style="text-align:left;" | RS485 || colspan="2" | Other length: Contact manufacturer
|}
|}


=== Package Contents ===
=== Products and Accessories ===


[[File:LIGO-PRO-accessories.png|center|600px|thumb|Figure 16. Sensor and all the accessories]]
[[File:LIGO-PRO-accessories.png|center|700px|thumb|Figure 16: Sensor and all the accessories]]


{| class="wikitable"
{| class="wikitable" style="text-align:center;"
|-
|-
! No. !! Description !! Qty (pcs)
! No. !! Description !! Qty (pcs)
|-
|-
| style="text-align:center;" | 1 || LIGO PRO Fuel Level Sensor. Standard lengths: 700, 1000, 1500 mm (for other customized lengths, please contact the manufacturer) || style="text-align:center;" | 01
| 1 || style="text-align:left;" | LIGO PRO Fuel Level Sensor. Standard lengths: 700, 1000, 1500mm (for other customized lengths, please contact the manufacturer) || 01
|-
|-
| style="text-align:center;" | 2 || Oil filter || style="text-align:center;" | 01
| 2 || style="text-align:left;" | Oil filter || 01
|-
|-
| style="text-align:center;" | 3 || Gasoline-resistant rubber gasket || style="text-align:center;" | 01
| 3 || style="text-align:left;" | Gasoline resistant rubber gasket || 01
|-
|-
| style="text-align:center;" | 4 || Anti-vibration spring when moving || style="text-align:center;" | 01
| 4 || style="text-align:left;" | Anti-vibration spring when moving || 01
|-
|-
| style="text-align:center;" | 5 || 2A Fuse protection || style="text-align:center;" | 01
| 5 || style="text-align:left;" | 2A Fuse protection || 01
|-
|-
| style="text-align:center;" | 6 || Self-drilling screw M4.8 × 32 mm || style="text-align:center;" | 04
| 6 || style="text-align:left;" | Self-drilling screw M4.8x32mm || 04
|-
|-
| style="text-align:center;" | 7 || Rivet and screw M5 × 20 mm || style="text-align:center;" | 04
| 7 || style="text-align:left;" | Rivet and screw M5x20mm || 04
|-
|-
| style="text-align:center;" | 8 || Sealing cord || style="text-align:center;" | 01
| 8 || style="text-align:left;" | Sealing cord || 01
|-
|-
| style="text-align:center;" | 9 || Plastic wire sealing connector || style="text-align:center;" | 01
| 9 || style="text-align:left;" | Plastic wire sealing connector || 01
|-
|-
| style="text-align:center;" | 10 || 7 m PVC coated signal wire || style="text-align:center;" | 01
| 10 || style="text-align:left;" | 7m PVC coated signal wire || 01
|-
|-
| style="text-align:center;" | 11 || Quick installation manual || style="text-align:center;" | 01
| 11 || style="text-align:left;" | Quick installation manual || 01
|}
|}


== Technical Specifications ==
== Technical Specifications ==


Technical specifications of the LIGO PRO product:
Technical specifications of the LIGO PRO product


{| class="wikitable" style="text-align:center;"
{| class="wikitable" style="text-align:center;"
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! Parameter !! AF !! RS232 !! RS485
! Parameter !! AF !! RS232 !! RS485
|-
|-
| style="text-align:left;" | Standard length (L), mm || colspan="3" | 700, 1000, 1500 … up to 6000
| style="text-align:left;" | Standard length (L), mm || colspan="3" | 700, 1000, 1500...up to 6000 mm
|-
|-
| style="text-align:left;" | Measuring error, % || colspan="3" | ± 0.5 %
| style="text-align:left;" | Measuring error, % || colspan="3" | ± 0.5 %
|-
|-
| style="text-align:left;" | Output signal || Analog (0…9 V), Frequency (500–2000 Hz) || RS232 || RS485
| style="text-align:left;" | Output signal || Analog (0…9V), Frequency (500- 2000Hz) || RS232 || RS485
|-
|-
| style="text-align:left;" | Baud rate, bit/sec || 9600 || colspan="2" | 2400, 4800, 9600, 19200, 38400, 57600, 115200
| style="text-align:left;" | Baud rate, bit/sec || 9600 || colspan="2" | 2400, 4800, 9600, 19200, 38400, 57600, 115200.
|-
|-
| style="text-align:left;" | Power supply (DC input voltage, V) || colspan="3" | 7…50
| style="text-align:left;" | Power supply (DC input voltage, V) || colspan="3" | 7…50
Line 109: Line 104:
| style="text-align:left;" | Ingress protection rating || colspan="3" | IP69K
| style="text-align:left;" | Ingress protection rating || colspan="3" | IP69K
|-
|-
| style="text-align:left;" | Operating temperature, °C || colspan="3" | −40…+85
| style="text-align:left;" | Operating temperature, °C || colspan="3" | -40...+85
|-
|-
| style="text-align:left;" | Maximum allowed humidity level, % || colspan="3" | 100
| style="text-align:left;" | Maximum allowed humidity level, % || colspan="3" | 100
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| style="text-align:left;" | Resolution, bit || colspan="3" | 12
| style="text-align:left;" | Resolution, bit || colspan="3" | 12
|-
|-
| style="text-align:left;" | Digital reading range corresponding to minimum level measurement value || Analog (0…8 V); Frequency (500…1500 Hz) || 0 || 0
| style="text-align:left;" | Digital reading range corresponding to the minimum level measurement value || Analog (0...8); Frequency (500...1500 Hz) || 0 || 0
|-
|-
| style="text-align:left;" | Digital reading range corresponding to maximum level measurement value || Analog (1…9 V); Frequency (1000…2000 Hz) || 4095 || 4095
| style="text-align:left;" | Digital reading range corresponding to the maximum level measurement value || Analog (1...9V); Frequency (1000...2000 Hz) || 4095 || 4095
|-
|-
| style="text-align:left;" | Average sampling period, s || colspan="3" | 0…255
| style="text-align:left;" | Average sampling period, (s) || colspan="3" | 0...255
|-
|-
| style="text-align:left;" | Message interval, s || Continuous || 1…60 || 1…60
| style="text-align:left;" | Message interval, (s) || Continuous || 1...60 || 1...60
|-
|-
| style="text-align:left;" | Absolute error in temperature measurement, °C || colspan="3" | ± 2
| style="text-align:left;" | Absolute error in temperature measurement within the entire temperature measuring range, °С || colspan="3" | ±2
|-
|-
| style="text-align:left;" | Average service life, years (minimum) || colspan="3" | 10
| style="text-align:left;" | Average service life, years (minimum) || colspan="3" | 10
|}
|}


=== Output Signal Characteristics ===
=== Technical Characteristics ===


'''1. Voltage output signal depending on the probe length'''
'''1. Voltage output signal depending on the probe length'''


[[File:LIGO-PRO-output-voltage-chart.png|center|600px|thumb|Figure 1. Dependence of the voltage output signal on the fuel level.]]
[[File:LIGO-PRO-output-voltage-chart.png|center|700px|thumb|Figure 1. Dependence of the voltage output signal on the fuel level.]]


Operating voltage range from 0…9 V.
Operating voltage range from (0…9V).


'''2. Frequency output signal depending on the probe length'''
'''2. Frequency output signal depending on the probe length'''


[[File:LIGO-PRO-output-frequency-chart.png|center|600px|thumb|Figure 2. Dependence of the frequency output signal on the probe length.]]
[[File:LIGO-PRO-output-frequency-chart.png|center|700px|thumb|Figure 2. Dependence of the frequency output signal on the probe length.]]


Operating frequency range from 500–2000 Hz.
Operating frequency range from (500-2000Hz).


'''3. RS232/RS485 output signal depending on the probe length'''
'''3. RS232/RS485 output signal depending on the probe length'''


[[File:LIGO-PRO-output-digital-chart.png|center|600px|thumb|Figure 3. Dependence of the RS232/RS485 output signal on the probe length.]]
[[File:LIGO-PRO-output-digital-chart.png|center|700px|thumb|Figure 3. Dependence of the RS232/RS485 output signal on the probe length.]]


Measurement range from 0–4095.
Measurement range from (0-4095)


=== Overall Dimensions and Detailed Description ===
=== Overall Dimensions and Detailed Descriptions ===


[[File:LIGO-PRO-dimensions.png|center|600px|thumb|Figure 4. Overall dimensions of LIGO PRO fuel level sensor.]]
[[File:LIGO-PRO-dimensions.png|center|700px|thumb|Figure 4. Overall dimensions of LIGO PRO fuel level sensor.]]


[[File:LIGO-PRO-parts-description.png|center|600px|thumb|Figure 5. Description of sensor's parts.]]
[[File:LIGO-PRO-parts-description.png|center|700px|thumb|Figure 5: Description of sensor's parts]]
 
'''Description:'''


{| class="wikitable"
{| class="wikitable"
|-
|-
! No. !! Content
! No !! Content
|-
|-
| style="text-align:center;" | 1 || Oil filter
| style="text-align:center;" | 1 || Oil filter
Line 162: Line 159:
| style="text-align:center;" | 2 || Sensing probe
| style="text-align:center;" | 2 || Sensing probe
|-
|-
| style="text-align:center;" | 3 || Gasoline-resistant rubber gasket
| style="text-align:center;" | 3 || Gasoline resistant rubber gasket
|-
|-
| style="text-align:center;" | 4 || Sensor's head containing sensing circuit board
| style="text-align:center;" | 4 || Sensor's head containing sensing circuit board
Line 172: Line 169:
| style="text-align:center;" | 7 || Anti-vibration spring
| style="text-align:center;" | 7 || Anti-vibration spring
|-
|-
| style="text-align:center;" | 8 || Self-drilling M4.8 × 32 mm × 4 pcs or M5 × 20 Rivet nut × 4 pcs
| style="text-align:center;" | 8 || Self-drilling M4.8x32mm x 4pcs or M5x20 Rivet nut x4pcs
|}
|}


=== Connector ===
=== Connector ===


[[File:LIGO-PRO-connector.png|center|600px|thumb|Figure 6. The detail of connector pins.]]
[[File:LIGO-PRO-connector.png|center|700px|thumb|Figure 6. The detail of connector]]
 
'''Pins'''


{| class="wikitable" style="text-align:center;"
{| class="wikitable" style="text-align:center;"
|-
|-
! Pin !! Description
! PIN !! DESCRIPTION
|-
|-
| 1 || style="text-align:left;" | GND
| 1 || style="text-align:left;" | GND
Line 189: Line 188:
| 3 || style="text-align:left;" | 7…50 VDC
| 3 || style="text-align:left;" | 7…50 VDC
|-
|-
| 4 || style="text-align:left;" | TXD / A+
| 4 || style="text-align:left;" | TXD/A+
|-
|-
| 5 || style="text-align:left;" | Analog or Frequency
| 5 || style="text-align:left;" | Analog or Frequency
|-
|-
| 6 || style="text-align:left;" | RXD / B−
| 6 || style="text-align:left;" | RXD/ B-
|}
|}


=== Connecting LIGO PRO to an External Device ===
==== 1. Connecting LIGO PRO to an external device ====


'''RS232 / RS485'''
'''+ RS232/ RS485'''
 
[[File:LIGO-PRO-wiring-RS232-RS485.png|center|800px|thumb|Figure 7. Wiring diagram of RS232 and RS485 output signals.]]


{| class="wikitable" style="text-align:center;"
{| class="wikitable" style="text-align:center;"
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! Wire Colour !! Description
! Wire Colour !! Description
|-
|-
| style="background:#1a1a1a;color:#fff;font-weight:bold;" | Black || style="text-align:left;" | GND (Ground) (V−)
| style="background:#1a1a1a;color:#fff;font-weight:bold;" | Black || style="text-align:left;" | GND (Ground) (V-)
|-
|-
| style="background:#FFD700;color:#000;font-weight:bold;" | Yellow || style="text-align:left;" | RXD / B−
| style="background:#FFD700;color:#000;font-weight:bold;" | Yellow || style="text-align:left;" | RXD/B-
|-
|-
| style="background:#1E88E5;color:#fff;font-weight:bold;" | Blue || style="text-align:left;" | TXD / A+
| style="background:#1E88E5;color:#fff;font-weight:bold;" | Blue || style="text-align:left;" | TXD/A+
|-
|-
| style="background:#E53935;color:#fff;font-weight:bold;" | Red || style="text-align:left;" | 7…50 VDC
| style="background:#E53935;color:#fff;font-weight:bold;" | Red || style="text-align:left;" | 7…50VDC
|}
|}


'''AF (Analog & Frequency)'''
[[File:LIGO-PRO-wiring-RS232-RS485.png|center|700px|thumb|Figure 7. Wiring diagram of RS232 and RS485 output signals.]]


[[File:LIGO-PRO-wiring-AF.png|center|800px|thumb|Figure 8. Wiring diagram of Analog and Frequency output signals.]]
'''+ AF (Analog & Frequency)'''


{| class="wikitable" style="text-align:center;"
{| class="wikitable" style="text-align:center;"
Line 223: Line 220:
! Wire Colour !! Description
! Wire Colour !! Description
|-
|-
| style="background:#1a1a1a;color:#fff;font-weight:bold;" | Black || style="text-align:left;" | GND (Ground) (V−)
| style="background:#1a1a1a;color:#fff;font-weight:bold;" | Black || style="text-align:left;" | GND (Ground) (V-)
|-
|-
| style="background:#FFD700;color:#000;font-weight:bold;" | Yellow || style="text-align:left;" | Out (Analog / Frequency)
| style="background:#FFD700;color:#000;font-weight:bold;" | Yellow || style="text-align:left;" | Out (Analog/Frequency)
|-
|-
| style="background:#E53935;color:#fff;font-weight:bold;" | Red || style="text-align:left;" | 7…50 VDC
| style="background:#E53935;color:#fff;font-weight:bold;" | Red || style="text-align:left;" | 7…50VDC
|}
|}


LIGO fuel sensor is protected against reverse-polarity and overvoltage. This feature helps to protect circuit boards against incorrect connections and it can withstand a continuous over-voltage condition (up to 50 V in LIGO-SP product and 100 V in LIGO-SP-PRO product) and short-circuit. Please avoid connecting sensor to a power supply which is unstable, usually fluctuates, or has a voltage higher than the recommended voltage range above.
[[File:LIGO-PRO-wiring-AF.png|center|700px|thumb|Figure 8. Wiring diagram of Analog and Frequency output signals.]]


Using a fuse coupled with one pole (−) or (+) is recommended for over-voltage protection purpose in case the car equipment is too old or the power cannot be guaranteed. It is advisable to use fuses which have the rated current less than 2 A.
LIGO fuel sensor is protected against reverse-polarity and overvoltage. This feature helps to protect circuit boards against incorrect connections and it can withstand a continuous over-voltage condition (up to 50V in LIGO-SP product and 100V in LIGO-SP-PRO product) and short-circuit. Please avoid connecting sensor to a power supply which is unstable, usually fluctuates, or has a voltage higher than the recommended voltage range above.


=== Configuration Software Interface ===
Using a fuse coupled with one pole (-) or (+) is recommended for over-voltage protection purpose in case the car equipment is too old or the power cannot be guaranteed. It isadvisable to use fuses which have the rated current less than 2A.


'''A. On Mobile Platform'''
==== 2. Configuration software interface ====


Connecting the sensor to LIGO mobile configurator:
'''A. On mobile platform'''


[[File:LIGO-PRO-mobile-connect.png|center|600px|thumb|Figure 9. Connecting the sensor to the LIGO mobile configurator.]]
Connecting the sensor to LIGO mobile configurator


Configuring and managing the appropriate settings for the LIGO device sensor is essential to ensure its proper, stable, and accurate operation. It also allows for continuous monitoring of the device's operational status, potential failures (whether caused by the sensor itself or external factors), and overall lifespan.
[[File:LIGO-PRO-mobile-connect.png|center|700px|thumb|Figure 9. Connecting the sensor to the LIGO mobile configurator]]


[[File:LIGO-PRO-mobile-ui.png|center|600px|thumb|Figure 10. Device's management, setting up and configuration software interface.]]
Configuring and managing the appropriate settings for the LiGO device sensor is essential to ensure its proper, stable, and accurate operation. It also allows for continuous monitoring of the device's operational status, potential failures (whether caused by the sensor itself or external factors), and overall lifespan.


'''B. On PC Device'''
[[File:LIGO-PRO-mobile-ui.png|center|700px|thumb|Figure 10. Device's management, setting up and configuration software interface]]


Connecting the sensor to LIGO configurator on the PC:
'''B. On PC device'''


[[File:LIGO-PRO-pc-connect.png|center|600px|thumb|Figure 11. Connection diagram of sensor to PC via a configuration tool.]]
Connecting the sensor to LIGO configurator on the PC.
 
[[File:LIGO-PRO-pc-connect.png|center|700px|thumb|Figure 11. Connection diagram of sensor to PC via a configuration tool.]]


In addition to the configuration options on mobile platforms, we also provide the capability to configure the sensor on personal computers (PCs), enabling remote support and more in-depth setup and configuration of the sensor.
In addition to the configuration options on mobile platforms, we also provide the capability to configure the sensor on personal computers (PCs), enabling remote support and more in-depth setup and configuration of the sensor.


[[File:LIGO-PRO-pc-ui.png|center|600px|thumb|Figure 12. Device's management, setting up and configuration software interface on PC.]]
[[File:LIGO-PRO-pc-ui.png|center|700px|thumb|Figure 12. Device's management, setting up and configuration software interface on PC]]


'''Main parameters:'''
'''Main parameters:'''


# '''Sensor:'''
# '''Sensor:'''
#* '''Restore password:''' Restore user password, user will receive an encrypted string which will be sent to SOJI for password decryption.
#: Restore password: Restore user password, user will receive an encrypted string which will be sent to SOJI for password decryption
#* '''Change password:''' Change user password.
#: Change password: Change user password
#* '''Load config:''' Load configurations from sensor to PC. Note: user must load configurations from sensor before changing configurations on PC.
#: Load config: Load configurations from sensor to PC. Note: user must load configurations from sensor before changing configurations on PC
#* '''Save config:''' Save configurations from PC to sensor.
#: Save config: Save configurations from PC to sensor
#* '''Update firmware:''' Upgrade new firmware for sensor (visit www.sojielectronics.com for the latest firmware version).
#: Update firmware: Upgrade new firmware for sensor (visit www.sojielectronics.com for the latest firmware version)
#* '''Set Full:''' Set Full for maximum fuel level calibration.
#: Set full: Set Full for maximum fuel level calibration
#* '''Set Empty:''' Set Empty for minimum fuel level calibration.
#: Set Empty: Set Empty for minimum fuel level calibration
#* '''Exit:''' Quit configuration interface.
#: Exit: Quit configuration interface
# '''Language:''' Choose English or Vietnamese interface.
# '''Language:''' Choose English or Vietnamese interface
# '''Level Min:''' Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input.
# '''Level Min:''' Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input
# '''Level Max:''' Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input.
# '''Level Max:''' Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input
# '''Output type:''' Select analog or frequency output (used only for LIGO PRO-AF).
# '''Output type:''' Select analog or frequency output (used only for LIGO PRO-AF)
# '''Filter time:''' Set output signal processing time. Default time 60 seconds.
# '''Filter time:''' set output signal processing time. Default time 60 seconds.
# '''Automatic transmission mode:''' Applied only to RS232/RS485 defines sensor output message type:
# '''Automatic transmission mode:''' Automatic transmission mode applied only to RS232/RS485 defines sensor output message type:
#* '''Off''' — no automatic message transmission, sensor is waiting for tracking device request;
#* Off – no automatic message transmission, sensor is waiting for tracking device request;
#* '''HEX''' — automatic message transmission in binary format (used by default);
#* HEX - automatic message transmission in binary format (used by default);
#* '''ASCII''' — automatic message transmission in text format;
#* ASCII - automatic message transmission in text format;
#* '''ASCII EXT''' — automatic message transmission in extended text format. Additional Prefix and Postfix configurable parameters are available for this mode to insert required header or ending of the message.
#* ASCII EXT – automatic message transmission in extended text format. Additional Prefix and Postfix configurable parameters are available for this mode to insert required header or ending of the message.
# '''Message interval:''' Time period that the sensor automatically sends output message to the tracking device. Parameter value range is from 1…60 seconds with 1 second step. Default value is 1 second.
# '''Message interval:''' Time period that the sensor automatically sends output message to the tracking device. Parameter value range is from 1…60 seconds with 1 second step. Default value is 1 second.
# '''Actual length:''' The actual length of sensor probe.
# '''Actual length:''' The actual length of sensor probe
# '''Address (0–254):''' Set the network address for the sensor. When several sensors are connected to one external device, they should have a unique network address.
# '''Address (0-254):''' Set the network address for the sensor. When several sensors are connected to one external device, they should have a unique network address.
# '''Parameter selection:''' Select output value type for sensor data. One of the following output value types available for LIGO PRO-RS232 and LIGO PRO-RS485:
# '''Parameter selection:''' Select output value type for sensor data
#* Fuel level in standard (normalized) units (0…1000);
#: One of the following output value types available for LIGO PRO-RS232 and LIGO PRO-RS485
#* Fuel level in standard (normalized) units (0...1000);
#* Fuel level in millimeters (mm), 0.1 mm step;
#* Fuel level in millimeters (mm), 0.1 mm step;
#* Fuel volume in liters (L), 0.1 L step;
#* Fuel volume in liters (L), 0.1 L step;
#* Fuel volume in percentage (%), 0.4% step.
#* Fuel volume in percentage (%), 0.4% step.
# '''COM Port:''' COM port number will be displayed on PC as well as baud rate for RS232 and RS485.
# '''COM Port:''' COM port number will be displayed on PC as well as baud rate for RS232 and RS485.
# '''Baud rate:''' Select the rate for data exchange with external device. Default value: 9600 bit/s.
# '''Baud rate:''' Select the rate for data exchange with external device. Default value – 9600 bit/s.
# '''Output:'''
# '''Output:'''
#* '''OSC frequency:''' Initial measuring generator frequency (Hz).
#: OSC frequency: Initial measuring generator frequency (Hz)
#* '''Data output:''' Data output (0–4095).
#: Data output: Data output (0-4095)
#* '''Sensor message:''' Sensor working message.
#: Sensor message: Sensor working message
 
'''Sensor message codes:'''


{| class="wikitable"
{| class="wikitable"
Line 298: Line 296:
! Sensor message !! Transcript of the malfunction code !! Possible solution
! Sensor message !! Transcript of the malfunction code !! Possible solution
|-
|-
| style="text-align:center;" | 255 or 254 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor.
| style="text-align:center;" | 255 or 254 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
|-
|-
| style="text-align:center;" | 253 || Short circuit in measuring probe tubes || Wash the measuring probe tubes with clean fuel, clean fuel tank of mud and water.
| style="text-align:center;" | 253 || Short circuit in measuring probe tubes || Wash the measuring probe tubes with clean fuel, clean fuel tank of mud and water.
|-
|-
| style="text-align:center;" | 252 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor.
| style="text-align:center;" | 252 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
|-
|-
| style="text-align:center;" | 251 || Hardware failure || Contact supplier.
| style="text-align:center;" | 251 || Hardware failure || Contact supplier
|-
|-
| style="text-align:center;" | 250 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor.
| style="text-align:center;" | 250 || Calibration error || Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
|}
|}


* '''Sensor temperature:''' Temperature inside sensor circuit board.
* '''Sensor temperature:''' temperature inside sensor circuit board
* '''Sensor type:''' Sensor models RS232, RS485, AF.
* '''Sensor type:''' Sensor models RS232, RS485, AF


'''Other interface elements:'''
# '''Calibration Table:''' Calibration table
* '''Calibration Table:''' Calibration table.
# '''History:''' Configuration history
* '''History:''' Configuration history.
# '''Enable AutoCalib feature:''' Automatically calibrate after cutting. User does not need to reconfigure after cutting.
* '''Enable AutoCalib feature:''' Automatically calibrate after cutting. User does not need to reconfigure after cutting.
# '''Infor device:'''
* '''Info device:'''
#: Firmware version: Sensor's firmware version
** '''Firmware version:''' Sensor's firmware version.
#: Device ID: Sensing chip's ID
** '''Device ID:''' Sensing chip's ID.
#: HW version: Sensor's hardware version
** '''HW version:''' Sensor's hardware version.
#: Boot version: Sensor's bootloader version
** '''Boot version:''' Sensor's bootloader version.


=== Connecting Multiple Sensors Together ===
==== 3. Connecting multiple sensors together ====


''(Only applicable to RS232 and RS485)''
''(Only applicable to RS232 and RS485)''


In some situations, there are oil tanks with specific dimensions, interconnected oil tanks, or oil tanks that are either too long or too large. Using just one sensor to measure the accurate fuel level inside these oil tanks may not be feasible. Hence, there is a need to connect two or more sensors together through a data processor called '''SUM-DATA'''.
In some situations, there are oil tanks with specific dimensions, interconnected oil tanks, or oil tanks that are either too long or too large. Using just one sensor to measure the accurate fuel level inside these oil tanks may not be feasible. Hence, there is a need to connect two or more sensors together through a data processor called SUM-DATA.


[[File:LIGO-PRO-multi-sensor-tank.png|center|600px|thumb|Figure 13. Oil tank with particular dimensions connecting multiple sensors together.]]
[[File:LIGO-PRO-multi-sensor-tank.png|center|700px|thumb|Figure 13. Oil tank with particular dimensions connecting multiple sensors together]]


Connection diagram of the processor SUM-DATA for multiple sensors:
Connection diagram of the processor SUM-DATA for multiple sensors:


[[File:LIGO-PRO-sumdata-2sensors.png|center|600px|thumb|Figure 14. Connecting two sensors by 01 processor SUM-DATA.]]
[[File:LIGO-PRO-sumdata-2sensors.png|center|700px|thumb|Figure 14: Connecting two sensors by 01 processor SUM-DATA]]


[[File:LIGO-PRO-sumdata-multi.png|center|750px|thumb|Figure 15. Connecting multiple sensors together by multiple processors SUM-DATA.]]
[[File:LIGO-PRO-sumdata-multi.png|center|700px|thumb|Figure 15: Connecting multiple sensors together by multiple processors SUM-DATA]]


=== Installation ===
=== Installation ===
Line 340: Line 337:
Quick installation through 5 steps:
Quick installation through 5 steps:


# Pierce oil tank.
# Step 1: Pierce oil tank
# Based on oil tank's height, cut a suitable level indicator.
# Step 2: Based on oil tank's height, cut a suitable level indicator
# Configure new length.
# Step 3: Configure new length
# Install the level indicator in the oil tank.
# Step 4: Install the level indicator in the oil tank
# Re-adjust the sensor according to the volume of the oil tank.
# Step 5: Re-adjust the sensor according to the volume of the oil tank


[[File:LIGO-PRO-installation-5steps.png|center|600px|thumb|Figure 17. 5-step sensor installation.]]
[[File:LIGO-PRO-installation-5steps.png|center|700px|thumb|Figure 17. 5-step sensor installation.]]


For further information about the sensor's installation procedure and configurator software, please visit our website [https://www.sojielectronics.com www.sojielectronics.com] or contact us for more details.
For further information about the sensor's installation procedure and configurator software, please visit our website [http://www.sojielectronics.com www.sojielectronics.com] or contact us for more details.


== Compliance and Certifications ==
== Compliance and Certifications ==


''No certification or compliance information was provided in the source datasheet (LIGO PRO Series Datasheet 2023). Refer to [[Product Certification & Approvals]] for current certificate status.''
Refer to [[Product Certification & Approvals]] for current certificate status.''


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Revision as of 03:59, 11 June 2026

Product Overview

The LIGO PRO fuel level sensor represents a significant advancement as a third-generation product, having undergone extensive mechanical refinements to enhance both performance and durability. These improvements enable the sensor to better cope with issues such as water resistance and electrical insulation, especially compared to its predecessors. Notably, this product adheres to the highest standards of water and chemical resistance, including its ability to withstand water ingress according to the IP69K standard.

Another key feature is the sensor's base, constructed from synthetic plastic, which has been cleverly designed to flex and conform seamlessly to the curved surfaces of fuel tanks without the need for multiple rubber gaskets to prevent oil spillage.

Furthermore, the product is manufactured with high-quality materials, ensuring reliability in extreme temperature environments. It effectively withstands the impacts of chemicals, gasoline, and UV radiation without succumbing to any form of degradation or corrosion. This makes the sensor an ideal choice for applications in harsh temperature conditions and those requiring exceptional durability.

Key Features

  1. High accuracy up to 99.5%.
  2. Operating input voltage range from 7V-50V
  3. Internal isolation voltage up to 2500V.
  4. Possibility of cutting down or extending up to 6000mm (optional)
  5. Wide operating temperature range from -40°C to +85°C.
  6. A filter protecting the probe from dregs and water.
  7. Ingress protection rating IP69K
  8. Noise filter and temperature compensation system.
  9. Installation and configuration software on multiple application devices: phone, laptop, etc.
  10. Anti-vibration spring when moving.
  11. Quick installation, safety guaranty.

Applications

  • Trucks, container cars, excavators, trains…
  • Boats, barges.
  • Electric generators.
  • Industrial oil storage tanks and stationary storage tanks.
  • Factories, industrial zones.
  • Fuel storage tanks in agricultural machines and maritime transportation…

Product Variants / Ordering Information

LIGO PRO Order Code

For Example: 700mm length, output signal AF sensor has the order code: LIGO PRO - AFL7

Code Description Code Description
AF Analog (0…9VDC) L7 700mm
Frequency 500…2000Hz L10 1000mm
RS232 RS232 L15 1500mm
RS485 RS485 Other length: Contact manufacturer

Products and Accessories

Figure 16: Sensor and all the accessories
No. Description Qty (pcs)
1 LIGO PRO Fuel Level Sensor. Standard lengths: 700, 1000, 1500mm (for other customized lengths, please contact the manufacturer) 01
2 Oil filter 01
3 Gasoline resistant rubber gasket 01
4 Anti-vibration spring when moving 01
5 2A Fuse protection 01
6 Self-drilling screw M4.8x32mm 04
7 Rivet and screw M5x20mm 04
8 Sealing cord 01
9 Plastic wire sealing connector 01
10 7m PVC coated signal wire 01
11 Quick installation manual 01

Technical Specifications

Technical specifications of the LIGO PRO product

Parameter AF RS232 RS485
Standard length (L), mm 700, 1000, 1500...up to 6000 mm
Measuring error, % ± 0.5 %
Output signal Analog (0…9V), Frequency (500- 2000Hz) RS232 RS485
Baud rate, bit/sec 9600 2400, 4800, 9600, 19200, 38400, 57600, 115200.
Power supply (DC input voltage, V) 7…50
Maximum power consumption, mA 20
Dielectric strength of galvanic isolation, min (V) 2500
Ingress protection rating IP69K
Operating temperature, °C -40...+85
Maximum allowed humidity level, % 100
Resolution, bit 12
Digital reading range corresponding to the minimum level measurement value Analog (0...8); Frequency (500...1500 Hz) 0 0
Digital reading range corresponding to the maximum level measurement value Analog (1...9V); Frequency (1000...2000 Hz) 4095 4095
Average sampling period, (s) 0...255
Message interval, (s) Continuous 1...60 1...60
Absolute error in temperature measurement within the entire temperature measuring range, °С ±2
Average service life, years (minimum) 10

Technical Characteristics

1. Voltage output signal depending on the probe length

Figure 1. Dependence of the voltage output signal on the fuel level.

Operating voltage range from (0…9V).

2. Frequency output signal depending on the probe length

Figure 2. Dependence of the frequency output signal on the probe length.

Operating frequency range from (500-2000Hz).

3. RS232/RS485 output signal depending on the probe length

Figure 3. Dependence of the RS232/RS485 output signal on the probe length.

Measurement range from (0-4095)

Overall Dimensions and Detailed Descriptions

Figure 4. Overall dimensions of LIGO PRO fuel level sensor.
Figure 5: Description of sensor's parts

Description:

No Content
1 Oil filter
2 Sensing probe
3 Gasoline resistant rubber gasket
4 Sensor's head containing sensing circuit board
5 Twisted steel stainless steel plastic conduit
6 Connector IP67
7 Anti-vibration spring
8 Self-drilling M4.8x32mm x 4pcs or M5x20 Rivet nut x4pcs

Connector

Figure 6. The detail of connector

Pins

PIN DESCRIPTION
1 GND
2 NC (Not connected)
3 7…50 VDC
4 TXD/A+
5 Analog or Frequency
6 RXD/ B-

1. Connecting LIGO PRO to an external device

+ RS232/ RS485

Wire Colour Description
Black GND (Ground) (V-)
Yellow RXD/B-
Blue TXD/A+
Red 7…50VDC
Figure 7. Wiring diagram of RS232 and RS485 output signals.

+ AF (Analog & Frequency)

Wire Colour Description
Black GND (Ground) (V-)
Yellow Out (Analog/Frequency)
Red 7…50VDC
Figure 8. Wiring diagram of Analog and Frequency output signals.

LIGO fuel sensor is protected against reverse-polarity and overvoltage. This feature helps to protect circuit boards against incorrect connections and it can withstand a continuous over-voltage condition (up to 50V in LIGO-SP product and 100V in LIGO-SP-PRO product) and short-circuit. Please avoid connecting sensor to a power supply which is unstable, usually fluctuates, or has a voltage higher than the recommended voltage range above.

Using a fuse coupled with one pole (-) or (+) is recommended for over-voltage protection purpose in case the car equipment is too old or the power cannot be guaranteed. It isadvisable to use fuses which have the rated current less than 2A.

2. Configuration software interface

A. On mobile platform

Connecting the sensor to LIGO mobile configurator

Figure 9. Connecting the sensor to the LIGO mobile configurator

Configuring and managing the appropriate settings for the LiGO device sensor is essential to ensure its proper, stable, and accurate operation. It also allows for continuous monitoring of the device's operational status, potential failures (whether caused by the sensor itself or external factors), and overall lifespan.

Figure 10. Device's management, setting up and configuration software interface

B. On PC device

Connecting the sensor to LIGO configurator on the PC.

Figure 11. Connection diagram of sensor to PC via a configuration tool.

In addition to the configuration options on mobile platforms, we also provide the capability to configure the sensor on personal computers (PCs), enabling remote support and more in-depth setup and configuration of the sensor.

Figure 12. Device's management, setting up and configuration software interface on PC

Main parameters:

  1. Sensor:
    Restore password: Restore user password, user will receive an encrypted string which will be sent to SOJI for password decryption
    Change password: Change user password
    Load config: Load configurations from sensor to PC. Note: user must load configurations from sensor before changing configurations on PC
    Save config: Save configurations from PC to sensor
    Update firmware: Upgrade new firmware for sensor (visit www.sojielectronics.com for the latest firmware version)
    Set full: Set Full for maximum fuel level calibration
    Set Empty: Set Empty for minimum fuel level calibration
    Exit: Quit configuration interface
  2. Language: Choose English or Vietnamese interface
  3. Level Min: Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input
  4. Level Max: Configure LIGO PRO-AF output voltage or frequency range according to the voltage or frequency range of the tracking device input
  5. Output type: Select analog or frequency output (used only for LIGO PRO-AF)
  6. Filter time: set output signal processing time. Default time 60 seconds.
  7. Automatic transmission mode: Automatic transmission mode applied only to RS232/RS485 defines sensor output message type:
    • Off – no automatic message transmission, sensor is waiting for tracking device request;
    • HEX - automatic message transmission in binary format (used by default);
    • ASCII - automatic message transmission in text format;
    • ASCII EXT – automatic message transmission in extended text format. Additional Prefix and Postfix configurable parameters are available for this mode to insert required header or ending of the message.
  8. Message interval: Time period that the sensor automatically sends output message to the tracking device. Parameter value range is from 1…60 seconds with 1 second step. Default value is 1 second.
  9. Actual length: The actual length of sensor probe
  10. Address (0-254): Set the network address for the sensor. When several sensors are connected to one external device, they should have a unique network address.
  11. Parameter selection: Select output value type for sensor data
    One of the following output value types available for LIGO PRO-RS232 and LIGO PRO-RS485
    • Fuel level in standard (normalized) units (0...1000);
    • Fuel level in millimeters (mm), 0.1 mm step;
    • Fuel volume in liters (L), 0.1 L step;
    • Fuel volume in percentage (%), 0.4% step.
  12. COM Port: COM port number will be displayed on PC as well as baud rate for RS232 and RS485.
  13. Baud rate: Select the rate for data exchange with external device. Default value – 9600 bit/s.
  14. Output:
    OSC frequency: Initial measuring generator frequency (Hz)
    Data output: Data output (0-4095)
    Sensor message: Sensor working message
Sensor message Transcript of the malfunction code Possible solution
255 or 254 Calibration error Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
253 Short circuit in measuring probe tubes Wash the measuring probe tubes with clean fuel, clean fuel tank of mud and water.
252 Calibration error Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
251 Hardware failure Contact supplier
250 Calibration error Check if the measuring probe actual size value is inserted correctly and (or) re-calibrate the sensor
  • Sensor temperature: temperature inside sensor circuit board
  • Sensor type: Sensor models RS232, RS485, AF
  1. Calibration Table: Calibration table
  2. History: Configuration history
  3. Enable AutoCalib feature: Automatically calibrate after cutting. User does not need to reconfigure after cutting.
  4. Infor device:
    Firmware version: Sensor's firmware version
    Device ID: Sensing chip's ID
    HW version: Sensor's hardware version
    Boot version: Sensor's bootloader version

3. Connecting multiple sensors together

(Only applicable to RS232 and RS485)

In some situations, there are oil tanks with specific dimensions, interconnected oil tanks, or oil tanks that are either too long or too large. Using just one sensor to measure the accurate fuel level inside these oil tanks may not be feasible. Hence, there is a need to connect two or more sensors together through a data processor called SUM-DATA.

Figure 13. Oil tank with particular dimensions connecting multiple sensors together

Connection diagram of the processor SUM-DATA for multiple sensors:

Figure 14: Connecting two sensors by 01 processor SUM-DATA
Figure 15: Connecting multiple sensors together by multiple processors SUM-DATA

Installation

Quick installation through 5 steps:

  1. Step 1: Pierce oil tank
  2. Step 2: Based on oil tank's height, cut a suitable level indicator
  3. Step 3: Configure new length
  4. Step 4: Install the level indicator in the oil tank
  5. Step 5: Re-adjust the sensor according to the volume of the oil tank
Figure 17. 5-step sensor installation.

For further information about the sensor's installation procedure and configurator software, please visit our website www.sojielectronics.com or contact us for more details.

Compliance and Certifications

Refer to Product Certification & Approvals for current certificate status.

Cross-references to other documents.

Revision History

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