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== Product Overview ==
== Product Overview ==


LIGO-PRO-BLE Fuel Level Sensor is produced and developed by SOJI Electronics JSC. The device is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage, applicable in different fields. The measured values will be transmitted to an external device as an output signal such as Analog, Frequency, RS232, or RS485 to connect to an external device.
LIGO-PRO-BLE Fuel Level Sensor is produced and developed by SOJI Electronics JSC. The device is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage, applicable in different fields. The measured values will be transmitted to an external device as an output signal such as Analog, Frequency, RS232, or RS485… to connect to an external device.


The purpose of creating a new product was to satisfy the increasing demand of the transport telematics market for improved reliability of the design, data, and ease of installation. Unlike its predecessors, the new sensor is integrated with Bluetooth Low Energy (BLE) making installation more convenient, easier, and faster.
The purpose of creating a new product was to satisfy the increasing demand of the transport telematics market for improved reliability of the design, data, and ease of installation. Unlike its predecessors, the new sensor is integrated with Bluetooth Low Energy (BLE) making installation more convenient, easier, and faster.
Line 9: Line 9:
== Key Features ==
== Key Features ==


* High accuracy up to 99.5%.
* High accuracy up to 99,5%.
* Wide range input voltage: 6–40 V.
* Wide range input voltage: 6-40V.
* Galvanic isolation up to 2500 V.
* Galvanic isolation up to 2500V.
* Can be optionally cut off or prolonged up to 6000 mm.
* Can be optionally cut off or prolonged up to 6000mm.
* Wide operating temperature range from −40 °C to +85 °C.
* Wide operating temperature range from -40°C to +85°C.
* Built-in Anti-mud oil filter and anti-vibration springs.
* Built-in Anti-mud oil filter and anti-vibration springs.
* IP69K waterproof standard.
* IP69K waterproof standard.
Line 19: Line 19:


== Applications ==
== Applications ==
* Trucks, excavators, heavy construction machines…
* Trucks, excavators, heavy construction machines…
* Marine vessels and electric generators.
* Marine vessels and electric generators.
Line 26: Line 25:


== Product Variants / Ordering Information ==
== Product Variants / Ordering Information ==
=== Products and accessories ===


10 main items with specific quantities are described below:
10 main items with specific quantities are described below:


{| class="wikitable"
{| class="wikitable" style="text-align:center;"
|-
|-
! No. !! Description !! Qty (pcs)
! No. !! Description !! Qty (pcs)
|-
|-
| 1 || LIGO Fuel Level Sensor. Standard lengths: 700, 1000, and 1500 mm (for other customized lengths, please contact the manufacturer) || style="text-align:center; vertical-align:middle;" | 01
| 1 || style="text-align:left;" | LIGO Fuel Level Sensor. Standard lengths: 700, 1000, and 1500mm (for other customized lengths, please contact the manufacturer) || 01
|-
|-
| 2 || Oil filter || style="text-align:center; vertical-align:middle;" | 01
| 2 || style="text-align:left;" | Oil filter || 01
|-
|-
| 3 || Gasoline-resistant rubber gasket || style="text-align:center; vertical-align:middle;" | 01
| 3 || style="text-align:left;" | Gasoline-resistant rubber gasket || 01
|-
|-
| 4 || Anti-vibration spring when moving || style="text-align:center; vertical-align:middle;" | 01
| 4 || style="text-align:left;" | Anti-vibration spring when moving || 01
|-
|-
| 5 || 1A Fuse protection || style="text-align:center; vertical-align:middle;" | 01
| 5 || style="text-align:left;" | 1A Fuse protection || 01
|-
|-
| 6 || Self-drilling screw M4.8 × 32 mm || style="text-align:center; vertical-align:middle;" | 04
| 6 || style="text-align:left;" | Self-drilling screw M4.8x32mm || 04
|-
|-
| 7 || Rivet and screw M5 × 20 mm || style="text-align:center; vertical-align:middle;" | 04
| 7 || style="text-align:left;" | Rivet and screw M5x20mm || 04
|-
|-
| 8 || Sealing wire || style="text-align:center; vertical-align:middle;" | 02
| 8 || style="text-align:left;" | Sealing wire || 02
|-
|-
| 9 || 7 m signal wire || style="text-align:center; vertical-align:middle;" | 01
| 9 || style="text-align:left;" | 7m signal wire || 01
|-
|-
| 10 || Quick installation manual || style="text-align:center; vertical-align:middle;" | 01
| 10 || style="text-align:left;" | Quick installation manual || 01
|}
|}


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


{| class="wikitable"
{| class="wikitable" style="text-align:center;"
|-
|-
! Parameter !! AF !! RS232 !! RS485
! Parameter !! AF !! RS232 !! RS485
|-
|-
| Standard length (L), mm || colspan="3" style="text-align:center; vertical-align:middle;" | 700, 1000, 1500 … up to 6000
| style="text-align:left;" | Standard length (L), mm || colspan="3" | 700, 1000, 1500...up to 6000 mm
|-
|-
| Measuring error, % || colspan="3" style="text-align:center; vertical-align:middle;" | ± 0.5 %
| style="text-align:left;" | Measuring error, % || colspan="3" | ± 0.5 %
|-
|-
| Output signal || style="text-align:center; vertical-align:middle;" | Analog (0–9 V) || style="text-align:center; vertical-align:middle;" | RS232 || style="text-align:center; vertical-align:middle;" | RS485
| style="text-align:left;" | Output signal || Analog (0-9V) || RS232 || RS485
|-
|-
| Baud rate, bit/sec || colspan="3" style="text-align:center; vertical-align:middle;" | 2400, 4800, 9600, 19200, 38400, 57600, 115200
| style="text-align:left;" | Baud rate, bit/sec || colspan="3" | 2400, 4800, 9600, 19200, 38400, 57600, 115200.
|-
|-
| Power supply (DC input voltage, V) || colspan="3" style="text-align:center; vertical-align:middle;" | 6–40 V
| style="text-align:left;" | Power supply (DC input voltage, V) || colspan="3" | 6-40V
|-
|-
| Supply protection (Over-voltage 100 VDC for 2 minutes, Reverse polarity) || colspan="3" style="text-align:center; vertical-align:middle;" | Yes
| style="text-align:left;" | Supply protection (Over-voltage 100 VDC for 2 minutes. Reverse polarity) || colspan="3" | Yes
|-
|-
| Maximum power consumption, mA || colspan="3" style="text-align:center; vertical-align:middle;" | 20
| style="text-align:left;" | Maximum power consumption, mA || colspan="3" | 20
|-
|-
| Waterproof standard (Ingress protection rating, IP) || colspan="3" style="text-align:center; vertical-align:middle;" | IP69K
| style="text-align:left;" | Waterproof standard (Ingress protection rating, IP) || colspan="3" | IP69K
|-
|-
| Operating temperature, °C || colspan="3" style="text-align:center; vertical-align:middle;" | −40…+85
| style="text-align:left;" | Operating temperature, °C || colspan="3" | -40...+85
|-
|-
| Maximum allowed humidity level, % || colspan="3" style="text-align:center; vertical-align:middle;" | 100
| style="text-align:left;" | Maximum allowed humidity level,% || colspan="3" | 100
|-
|-
| Resolution, bit || colspan="3" style="text-align:center; vertical-align:middle;" | 12
| style="text-align:left;" | Resolution, bit || colspan="3" | 12
|-
|-
| Digital reading range corresponding to the minimum level measurement value || style="text-align:center; vertical-align:middle;" | Analog (0…8 V) || style="text-align:center; vertical-align:middle;" | 0 || style="text-align:center; vertical-align:middle;" | 0
| style="text-align:left;" | Digital reading range corresponding to the minimum level measurement value || Analog (0...8V) || 0 || 0
|-
|-
| Digital reading range corresponding to the maximum level measurement value || style="text-align:center; vertical-align:middle;" | Analog (1…9 V) || style="text-align:center; vertical-align:middle;" | 4095 || style="text-align:center; vertical-align:middle;" | 4095
| style="text-align:left;" | Digital reading range corresponding to the maximum level measurement value || Analog (1...9V) || 4095 || 4095
|-
|-
| Average sampling period, s || colspan="3" style="text-align:center; vertical-align:middle;" | 0…255
| style="text-align:left;" | Average sampling period, s || colspan="3" | 0...255
|-
|-
| Message interval, s || style="text-align:center; vertical-align:middle;" | Continuous || style="text-align:center; vertical-align:middle;" | 1…255 || style="text-align:center; vertical-align:middle;" | 1…255
| style="text-align:left;" | Message interval, s || Continuous || 1...255 || 1...255
|-
|-
| Absolute error in temperature measurement within the entire temperature measuring range, °С || colspan="3" style="text-align:center; vertical-align:middle;" | ± 1
| style="text-align:left;" | Absolute error in temperature measurement within the entire temperature measuring range, °С || colspan="3" | ±1
|-
|-
| Bluetooth specs || colspan="3" style="text-align:center; vertical-align:middle;" | Bluetooth 5.1, IEEE 802.15.4-2006, 2.4 GHz, −95 dBm sensitivity, +8 dBm TX Power
| style="text-align:left;" | Bluetooth specs || colspan="3" | Bluetooth 5.1, IEEE 802.15.4-2006, 2.4 GHz, -95 dBm sensitivity, +8 dBm TX Power
|-
|-
| Average service life, years (expected) || style="text-align:center; vertical-align:middle;" | 10 || style="text-align:center; vertical-align:middle;" | 10 || style="text-align:center; vertical-align:middle;" | 10
| style="text-align:left;" | Average service life, years (expected) || 10 || 10 || 10
|}
|}


=== Dimensions ===
=== Dimensions ===


[[File:LIGO-PRO-BLE-dimensions.png|center|600px|thumb|LIGO-PRO-BLE's overall dimensions (cm).]]
<div style="text-align:center;">
[[File:LIGO-PRO-BLE-dimensions.png|frameless|703px]]
<div style="font-style:italic; color:#555;">Figure 1. LIGO-PRO-BLE's overall dimensions (cm)</div>
</div>


=== Wiring Connection ===
=== Wiring Connection ===
Line 105: Line 109:
'''AF (Analog & Frequency)'''
'''AF (Analog & Frequency)'''


[[File:LIGO-PRO-BLE-wiring-AF.png|center|600px|thumb|Wiring diagram of Analog and Frequency output signals.]]
<div style="text-align:center;">
[[File:LIGO-PRO-BLE-wiring-AF.png|frameless|636px]]
<div style="font-style:italic; color:#555;">Figure 2. Wiring diagram of Analog and Frequency output signals</div>
</div>


'''RS232'''
'''RS232'''


[[File:LIGO-PRO-BLE-wiring-RS232.png|center|600px|thumb|Wiring diagram of RS232 output signals.]]
<div style="text-align:center;">
[[File:LIGO-PRO-BLE-wiring-RS232.png|frameless|642px]]
<div style="font-style:italic; color:#555;">Figure 3. Wiring diagram of RS232 output signals'''RS485'''</div>
</div>'''RS485'''<div style="text-align:center;">
[[File:BLE-RS485.jpg|frameless|656x656px]]
<div style="font-style:italic; color:#555;">Figure 4. Wiring diagram of RS485 output signals</div>
</div>


'''RS485'''
=== Connector ===


[[File:LIGO-PRO-BLE-wiring-RS485.png|center|600px|thumb|Wiring diagram of RS485 output signals.]]
<div style="text-align:center;">
[[File:LIGO-PRO-BLE-connector.png|frameless|624px]]
<div style="font-style:italic; color:#555;">Figure 5. The details of connector pins</div>
</div>


=== Connector ===
<div style="display:flex;gap:20px;justify-content:center;flex-wrap:wrap;align-items:flex-start;">
[[File:LIGO-PRO-BLE-connector.png|center|600px|thumb|The details of connector pins.]]


'''AF / RS232'''
<div>


{| class="wikitable"
{| class="wikitable" style="text-align:center;margin:0;"
|-
|+ AF/ RS232
! No. !! Description !! Color of the wire
! No !! Description !! Color of the wire
|-
|-
| 1 || GND || Black
| 1 || GND || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#000;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Black</span></div>
|-
|-
| 2 || NC (Not connected) || NC
| 2 || NC (Not connected) || '''NC'''
|-
|-
| 3 || VCC (6–40 V) || Red
| 3 || VCC (6-40V) || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#d63a3a;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Red</span></div>
|-
|-
| 4 || TXD || Blue
| 4 || TXD || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#3b8dd9;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Blue</span></div>
|-
|-
| 5 || Analog Output || White
| 5 || Analog Output || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#fff;border:1px solid #999;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">White</span></div>
|-
|-
| 6 || RXD || Brown
| 6 || RXD || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#7b3f00;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Brown</span></div>
|}
|}
</div>


'''RS485'''
<div>


{| class="wikitable"
{| class="wikitable" style="text-align:center;margin:0;"
|-
|+ RS485
! No. !! Description !! Color of the wire
! No !! Description !! Color of the wire
|-
|-
| 1 || GND || Black
| 1 || GND || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#000;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Black</span></div>
|-
|-
| 2 || RS485 (B) || Green
| 2 || RS485 (B) || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#2e8b2e;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Green</span></div>
|-
|-
| 3 || VCC (6–40 V) || Red
| 3 || VCC (6-40V) || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#d63a3a;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Red</span></div>
|-
|-
| 4 || TXD || Blue
| 4 || TXD || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#3b8dd9;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Blue</span></div>
|-
|-
| 5 || RS485 (A) || Yellow
| 5 || RS485 (A) || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#f4d03f;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Yellow</span></div>
|-
|-
| 6 || RXD || Brown
| 6 || RXD || <div style="display:flex;align-items:center;justify-content:center;gap:8px;"><span style="display:inline-block;width:32px;height:14px;background:#7b3f00;"></span><span style="min-width:60px;text-align:left;font-weight:bold;">Brown</span></div>
|}
|}
</div>
</div>


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


''No certification or compliance information was provided in the source datasheet (LIGO-PRO-BLE Datasheet V1.0.1). Refer to [[Product Certification & Approvals]] for current certificate status.''
Refer to [[LIGO PRO BLE Certification & Approvals]] for current certificate status.''




<div class="noprint">
<div class="noprint">
== Related Documents ==
== Related Documents ==
''Cross-references to other documents.''
''Cross-references to other documents.''

Latest revision as of 07:41, 7 July 2026

Product Overview

LIGO-PRO-BLE Fuel Level Sensor is produced and developed by SOJI Electronics JSC. The device is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage, applicable in different fields. The measured values will be transmitted to an external device as an output signal such as Analog, Frequency, RS232, or RS485… to connect to an external device.

The purpose of creating a new product was to satisfy the increasing demand of the transport telematics market for improved reliability of the design, data, and ease of installation. Unlike its predecessors, the new sensor is integrated with Bluetooth Low Energy (BLE) making installation more convenient, easier, and faster.

In addition, the new heavy-duty metal structure helps increase protection against electrostatic, electromagnetic and conducted interference. LIGO-PRO-BLE is also designed with IP69K waterproof standards and better shock and vibration resistance.

Key Features

  • High accuracy up to 99,5%.
  • Wide range input voltage: 6-40V.
  • Galvanic isolation up to 2500V.
  • Can be optionally cut off or prolonged up to 6000mm.
  • Wide operating temperature range from -40°C to +85°C.
  • Built-in Anti-mud oil filter and anti-vibration springs.
  • IP69K waterproof standard.
  • Integrated BLE technology for configuration via smartphone (available on App Store and Google Play).

Applications

  • Trucks, excavators, heavy construction machines…
  • Marine vessels and electric generators.
  • Off-highway machinery including high-temperature & vibration environments.
  • Industrial oil storage tanks or stationary storage tanks.

Product Variants / Ordering Information

Products and accessories

10 main items with specific quantities are described below:

No. Description Qty (pcs)
1 LIGO Fuel Level Sensor. Standard lengths: 700, 1000, and 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 1A Fuse protection 01
6 Self-drilling screw M4.8x32mm 04
7 Rivet and screw M5x20mm 04
8 Sealing wire 02
9 7m signal wire 01
10 Quick installation manual 01

Technical Specifications

Parameter AF RS232 RS485
Standard length (L), mm 700, 1000, 1500...up to 6000 mm
Measuring error, % ± 0.5 %
Output signal Analog (0-9V) RS232 RS485
Baud rate, bit/sec 2400, 4800, 9600, 19200, 38400, 57600, 115200.
Power supply (DC input voltage, V) 6-40V
Supply protection (Over-voltage 100 VDC for 2 minutes. Reverse polarity) Yes
Maximum power consumption, mA 20
Waterproof standard (Ingress protection rating, IP) 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...8V) 0 0
Digital reading range corresponding to the maximum level measurement value Analog (1...9V) 4095 4095
Average sampling period, s 0...255
Message interval, s Continuous 1...255 1...255
Absolute error in temperature measurement within the entire temperature measuring range, °С ±1
Bluetooth specs Bluetooth 5.1, IEEE 802.15.4-2006, 2.4 GHz, -95 dBm sensitivity, +8 dBm TX Power
Average service life, years (expected) 10 10 10

Dimensions

Figure 1. LIGO-PRO-BLE's overall dimensions (cm)

Wiring Connection

AF (Analog & Frequency)

Figure 2. Wiring diagram of Analog and Frequency output signals

RS232

Figure 3. Wiring diagram of RS232 output signalsRS485

RS485

Figure 4. Wiring diagram of RS485 output signals

Connector

Figure 5. The details of connector pins
AF/ RS232
No Description Color of the wire
1 GND
Black
2 NC (Not connected) NC
3 VCC (6-40V)
Red
4 TXD
Blue
5 Analog Output
White
6 RXD
Brown
RS485
No Description Color of the wire
1 GND
Black
2 RS485 (B)
Green
3 VCC (6-40V)
Red
4 TXD
Blue
5 RS485 (A)
Yellow
6 RXD
Brown

Compliance and Certifications

Refer to LIGO PRO BLE Certification & Approvals for current certificate status.


Cross-references to other documents.

Revision History

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