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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.
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.
<!-- IMAGE NEEDED: Product photo (front of datasheet, page 1). Upload as: LIGO-PRO-BLE-product-photo.png -->
[[File:LIGO-PRO-BLE-product-photo.png|center|400px|thumb|LIGO-PRO-BLE Fuel Level Sensor]]


== Key Features ==
== Key Features ==
Line 36: Line 33:
! 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) || 01
| 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
|-
|-
| 2 || Oil filter || 01
| 2 || Oil filter || style="text-align:center; vertical-align:middle;" | 01
|-
|-
| 3 || Gasoline-resistant rubber gasket || 01
| 3 || Gasoline-resistant rubber gasket || style="text-align:center; vertical-align:middle;" | 01
|-
|-
| 4 || Anti-vibration spring when moving || 01
| 4 || Anti-vibration spring when moving || style="text-align:center; vertical-align:middle;" | 01
|-
|-
| 5 || 1A Fuse protection || 01
| 5 || 1A Fuse protection || style="text-align:center; vertical-align:middle;" | 01
|-
|-
| 6 || Self-drilling screw M4.8 × 32 mm || 04
| 6 || Self-drilling screw M4.8 × 32 mm || style="text-align:center; vertical-align:middle;" | 04
|-
|-
| 7 || Rivet and screw M5 × 20 mm || 04
| 7 || Rivet and screw M5 × 20 mm || style="text-align:center; vertical-align:middle;" | 04
|-
|-
| 8 || Sealing wire || 02
| 8 || Sealing wire || style="text-align:center; vertical-align:middle;" | 02
|-
|-
| 9 || 7 m signal wire || 01
| 9 || 7 m signal wire || style="text-align:center; vertical-align:middle;" | 01
|-
|-
| 10 || Quick installation manual || 01
| 10 || Quick installation manual || style="text-align:center; vertical-align:middle;" | 01
|}
|}


Line 63: Line 60:
! Parameter !! AF !! RS232 !! RS485
! Parameter !! AF !! RS232 !! RS485
|-
|-
| Standard length (L), mm || colspan="3" | 700, 1000, 1500 … up to 6000
| Standard length (L), mm || colspan="3" style="text-align:center; vertical-align:middle;" | 700, 1000, 1500 … up to 6000
|-
|-
| Measuring error, % || colspan="3" | ± 0.5 %
| Measuring error, % || colspan="3" style="text-align:center; vertical-align:middle;" | ± 0.5 %
|-
|-
| Output signal || Analog (0–9 V) || RS232 || RS485
| 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
|-
|-
| Baud rate, bit/sec || colspan="3" | 2400, 4800, 9600, 19200, 38400, 57600, 115200
| Baud rate, bit/sec || colspan="3" style="text-align:center; vertical-align:middle;" | 2400, 4800, 9600, 19200, 38400, 57600, 115200
|-
|-
| Power supply (DC input voltage, V) || colspan="3" | 6–40 V
| Power supply (DC input voltage, V) || colspan="3" style="text-align:center; vertical-align:middle;" | 6–40 V
|-
|-
| Supply protection (Over-voltage 100 VDC for 2 minutes, Reverse polarity) || colspan="3" | Yes
| Supply protection (Over-voltage 100 VDC for 2 minutes, Reverse polarity) || colspan="3" style="text-align:center; vertical-align:middle;" | Yes
|-
|-
| Maximum power consumption, mA || colspan="3" | 20
| Maximum power consumption, mA || colspan="3" style="text-align:center; vertical-align:middle;" | 20
|-
|-
| Waterproof standard (Ingress protection rating, IP) || colspan="3" | IP69K
| Waterproof standard (Ingress protection rating, IP) || colspan="3" style="text-align:center; vertical-align:middle;" | IP69K
|-
|-
| Operating temperature, °C || colspan="3" | −40…+85
| Operating temperature, °C || colspan="3" style="text-align:center; vertical-align:middle;" | −40…+85
|-
|-
| Maximum allowed humidity level, % || colspan="3" | 100
| Maximum allowed humidity level, % || colspan="3" style="text-align:center; vertical-align:middle;" | 100
|-
|-
| Resolution, bit || colspan="3" | 12
| Resolution, bit || colspan="3" style="text-align:center; vertical-align:middle;" | 12
|-
|-
| Digital reading range corresponding to the minimum level measurement value || Analog (0…8 V) || 0 || 0
| 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
|-
|-
| Digital reading range corresponding to the maximum level measurement value || Analog (1…9 V) || 4095 || 4095
| 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
|-
|-
| Average sampling period, s || colspan="3" | 0…255
| Average sampling period, s || colspan="3" style="text-align:center; vertical-align:middle;" | 0…255
|-
|-
| Message interval, s || Continuous || 1…255 || 1…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
|-
|-
| Absolute error in temperature measurement within the entire temperature measuring range, °С || colspan="3" | ± 1
| Absolute error in temperature measurement within the entire temperature measuring range, °С || colspan="3" style="text-align:center; vertical-align:middle;" | ± 1
|-
|-
| Bluetooth specs || colspan="3" | Bluetooth 5.1, IEEE 802.15.4-2006, 2.4 GHz, −95 dBm sensitivity, +8 dBm TX Power
| 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
|-
|-
| Average service life, years (expected) || 10 || 10 || 10
| 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
|}
|}


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


<!-- IMAGE NEEDED: Figure 1 — LIGO-PRO-BLE's overall dimensions (cm). PDF page 4. Upload as: LIGO-PRO-BLE-dimensions.png -->
[[File:LIGO-PRO-BLE-dimensions.png|center|600px|thumb|LIGO-PRO-BLE's overall dimensions (cm).]]
[[File:LIGO-PRO-BLE-dimensions.png|center|600px|thumb|Figure 1. LIGO-PRO-BLE's overall dimensions (cm).]]


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


<!-- IMAGE NEEDED: Figure 2 — Wiring diagram of Analog and Frequency output signals. PDF page 5. Upload as: LIGO-PRO-BLE-wiring-AF.png -->
[[File:LIGO-PRO-BLE-wiring-AF.png|center|600px|thumb|Wiring diagram of Analog and Frequency output signals.]]
[[File:LIGO-PRO-BLE-wiring-AF.png|center|500px|thumb|Figure 2. Wiring diagram of Analog and Frequency output signals.]]


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


<!-- IMAGE NEEDED: Figure 3 — Wiring diagram of RS232 output signals. PDF page 5. Upload as: LIGO-PRO-BLE-wiring-RS232.png -->
[[File:LIGO-PRO-BLE-wiring-RS232.png|center|600px|thumb|Wiring diagram of RS232 output signals.]]
[[File:LIGO-PRO-BLE-wiring-RS232.png|center|500px|thumb|Figure 3. Wiring diagram of RS232 output signals.]]


'''RS485'''
'''RS485'''


<!-- IMAGE NEEDED: Figure 4 — Wiring diagram of RS485 output signals. PDF page 5. Upload as: LIGO-PRO-BLE-wiring-RS485.png -->
[[File:LIGO-PRO-BLE-wiring-RS485.png|center|600px|thumb|Wiring diagram of RS485 output signals.]]
[[File:LIGO-PRO-BLE-wiring-RS485.png|center|500px|thumb|Figure 4. Wiring diagram of RS485 output signals.]]


=== Connector ===
=== Connector ===
 
[[File:LIGO-PRO-BLE-connector.png|center|600px|thumb|The details of connector pins.]]
<!-- IMAGE NEEDED: Figure 5 — Details of connector pins. PDF page 6. Upload as: LIGO-PRO-BLE-connector.png -->
[[File:LIGO-PRO-BLE-connector.png|center|400px|thumb|Figure 5. The details of connector pins.]]


'''AF / RS232'''
'''AF / RS232'''

Latest revision as of 03:32, 10 June 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: 6–40 V.
  • Galvanic isolation up to 2500 V.
  • Can be optionally cut off or prolonged up to 6000 mm.
  • 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

10 main items with specific quantities are described below:

No. Description Qty (pcs)
1 LIGO Fuel Level Sensor. Standard lengths: 700, 1000, and 1500 mm (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 M4.8 × 32 mm 04
7 Rivet and screw M5 × 20 mm 04
8 Sealing wire 02
9 7 m signal wire 01
10 Quick installation manual 01

Technical Specifications

Parameter AF RS232 RS485
Standard length (L), mm 700, 1000, 1500 … up to 6000
Measuring error, % ± 0.5 %
Output signal Analog (0–9 V) RS232 RS485
Baud rate, bit/sec 2400, 4800, 9600, 19200, 38400, 57600, 115200
Power supply (DC input voltage, V) 6–40 V
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…8 V) 0 0
Digital reading range corresponding to the maximum level measurement value Analog (1…9 V) 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

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

Wiring Connection

AF (Analog & Frequency)

Wiring diagram of Analog and Frequency output signals.

RS232

Wiring diagram of RS232 output signals.

RS485

Wiring diagram of RS485 output signals.

Connector

The details of connector pins.

AF / RS232

No. Description Color of the wire
1 GND Black
2 NC (Not connected) NC
3 VCC (6–40 V) 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 (6–40 V) Red
4 TXD Blue
5 RS485 (A) Yellow
6 RXD Brown

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.


Cross-references to other documents.

Revision History

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