LIGO AIR Datasheet
Product Overview
The LIGO AIR is a Bluetooth Low Energy (BLE) wireless fuel level sensor developed and manufactured by SOJI Electronics JSC. It is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage, serving fleet telematics, industrial monitoring, and off-highway machinery applications. Built on Bluetooth 5.4 with a heavy-duty metal housing and an IP69K seal, the sensor delivers seamless, real-time data transmission without complex wiring — minimizing installation effort and the risk of signal-wire tampering.
The LIGO AIR series was engineered to address the long-standing weaknesses of competitive wireless fuel sensors: short battery life, unstable connectivity, and limited durability in harsh environments. With ultra-low power consumption, optional extended-life battery, and a directional-antenna long-range variant, LIGO AIR maintains stability, durability, and operational lifespan equal to — or greater than — wired sensors.
Key Features
- High measurement accuracy up to 99.5 %.
- Extended communication range — directional antenna technology delivers up to 1.5× the range of typical market-available wireless sensors.
- Ultra-low power consumption — 9 µA in working mode, 4 µA in storage mode — for longer battery life and reduced maintenance.
- Configurable probe length — can be cut or extended up to 6000 mm.
- Wide operating temperature range — −40 °C to +85 °C.
- High TX power up to 19.5 dBm on the LIGO AIR PRO variant.
- Extended battery capacity up to 3600 mAh (optional).
- Replaceable battery — supports field servicing.
- Built-in accelerometer (LIGO AIR PRO).
- Built-in 32 Mb EEPROM — data logs stored continuously for a minimum of 90 days, plus up to 500 setting logs.
- Built-in anti-mud oil filter and anti-vibration springs.
- IP69K waterproof rating.
- 8 – 10 years of battery life (variant-dependent).
Applications
- Transportation / Fleet — trucks, excavators, cement mixers, heavy construction machinery.
- Marine — marine vessels, bunker fuel monitoring.
- Power generation — backup and standby electric generators.
- Off-highway machinery — equipment operating in high-temperature and high-vibration environments.
- Industrial storage — oil storage tanks, stationary fuel storage facilities.
- Telecom / Infrastructure — base-station generators and remote-site fuel monitoring.
Product Variants / Ordering Information
Three specialized versions are available, each optimized for a specific operational priority — cost efficiency, extended battery life, or long-range communication:
| Model | Description | Target Use Case |
|---|---|---|
| LIGO AIR LxS | Standard version — cost-effective solution for essential monitoring with reliable performance. | Trucks, excavators, cement mixer trucks, heavy construction machinery. |
| LIGO AIR LxT | Extended-battery version — engineered for long operational life (8–12 years) and reliable performance in harsh and high-temperature environments. | Long-life deployments where servicing is difficult; high-temperature operation. |
| LIGO AIR PRO LxS | Long-range version — high TX power (19.5 dBm) for extended transmission distance and metal-obstructed environments. | Marine vessels, electric generators, industrial / stationary storage tanks. |
Package Contents
| No. | Item | Quantity |
|---|---|---|
| 1 | LIGO AIR Fuel Level Sensor (standard lengths 700 / 1000 / 1500 mm; custom on request) | 01 |
| 2 | Oil filter | 01 |
| 3 | Gasoline-resistant rubber gasket | 01 |
| 4 | Bottom-stop and springs | 01 |
| 5 | Self-drilling screw M4.8 × 32 mm | 04 |
| 6 | Rivet and screw M5 × 20 mm | 04 |
| 7 | Plastic seal cover | 01 |
| 8 | Quick installation manual | 01 |
Technical Specifications
| Parameter | LIGO AIR (LxS, LxT) | LIGO AIR-PRO | Unit |
|---|---|---|---|
| Standard length (L) | 700, 1000, 1500 ... up to 6000 | mm | |
| Measuring error | ± 0.5 | % | |
| Bluetooth specs | Bluetooth 5.4, IEEE 802.15.4-2006, 2.4 GHz, -95 dBm sensitivity TX power max: 6 dBm |
Bluetooth 5.4, IEEE 802.15.4-2006, 2.4 GHz, -95 dBm sensitivity TX power max: 19.5 dBm |
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| Advertising Protocol |
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| Power supply | 3.6V × 2600mAh (LxS) 3.6V × 2400mAh (LxT) |
3.6V × 3600mAh | |
| Current consumption in working mode | 9 | 27 | µA |
| Measurement interval | From 5 to 10 | s | |
| Advertising message interval | From 5 to 10 | From 10 to 15 | s |
| Waterproof standard (Ingress protection rating) | IP69K | ||
| Operating temperature | -40...+85 | °C | |
| Resolution | 12 | bit | |
| Accelerometer | N/A | Built-in | |
| Memory | Built-in 32MB EEPROM | ||
| Average sampling period | 5 to 60 | s | |
| Absolute error in temperature measurement within the entire temperature measuring range | ±2 | °C | |
| Average service life (expected) | 10 | years | |
Compliance and Certifications
Detailed test reports and certificate numbers: see Product Certification & Approvals.
Warranty
- Warranty period: 3 years from the date of shipment by the manufacturer.
- The warranty period and service life do not apply to the battery.
- Compliance with the specified operating, transport, and storage conditions is a prerequisite for the manufacturer's guarantee.
- The manufacturer reserves the right to modify the design and composition of the product without prior notice.
- See Warranty Terms and Conditions for full terms, exclusions, and void conditions.
Revision History
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