±1% Measurement Accuracy
Main reduced error of ±1% across the full measurement range ensures precise fuel volume readings for accurate consumption reporting and theft detection.
Fuel Level Sensor
Omnicomm LLS 4 Fuel Sensor
A high-precision digital fuel level sensor with RS-232 and RS-485 interfaces — measuring range up to 3000 mm, ±1% accuracy, IP69k jet-wash protection, and -60°C to +85°C operating range for demanding fleet environments.
RS-232 + RS-485
IP69k Rated
±1% Accuracy
-60°C to +85°C
Power Supply
7 – 80V DC
Accuracy
±1%
Accuracy
±1% error
Protection
IP69k Jet-wash
Temp Range
-60° to +85°C
Service Life
8 years avg.
Why it is useful
Built for accurate fuel measurement in the toughest environments
LLS 4 delivers ±1% accuracy in fuel level measurement even in harsh operating conditions — from arctic cold chains to hot desert construction fleets — with IP69k resistance to jet washing.
IP69k Jet-Wash Protected
IP69k casing withstands high-pressure jet washing — making LLS 4 suitable for mining, agriculture, and heavy construction where vehicles are regularly pressure-washed.
RS-232 & RS-485 Interfaces
Dual serial interface support makes LLS 4 compatible with virtually all fleet telematics terminals — including Teltonika FMC125, FMB125, and Omnicomm terminals.
Use Cases
Where Omnicomm LLS 4
Where Omnicomm LLS 4
fits well
Install LLS 4 in any fuel tank where accurate level measurement, theft detection, and consumption reporting are required — from light commercial vehicles to heavy mining trucks.
- Heavy truck and logistics fleets requiring fuel consumption tracking, refill verification, and theft detection.
- Construction and mining equipment with large saddle tanks subject to regular pressure washing — IP69k protection essential.
- Agriculture machinery including tractors, combines, and sprayers operating in extreme temperature environments.
- Stationary diesel generators and standby power systems requiring remote fuel level monitoring.
- Multi-sensor deployments on dual-tank vehicles — LLS 4 supports multiple sensors per RS-485 bus with unique network addresses.
Features and Specifications
Product Specifications
Omnicomm LLS 4 measures fuel level via RS-232/RS-485 and integrates with Teltonika terminals to feed Aether's fuel monitoring platform. Specs below are relevant for installation and configuration planning.
Fuel Measurement
| Measurement range | 0–700, 1000, 1500, 2000, 2500, 3000 mm |
| Main reduced error | ±1% |
| Measurement period | 1 second (continuous operation) |
| Digital output (max) | 1 – 4095 (12-bit resolution) |
| Digital output (min) | 0 – 1023 |
| Internal filter | 0 to 30 (configurable) |
| Filtration levels | None, Minimum, Medium, Maximum, Severe Conditions |
| Measurement medium | Factory-grade carbon fuels and mineral oils only |
Temperature Sensing
| Temperature range | -40°C to +80°C |
| Accuracy | ±2°C (across full range) |
| Output | Included in RS-232/RS-485 data frame |
| Use | Fuel density compensation and diagnostics |
Serial Interfaces
| Output interfaces | RS-232 and RS-485 (simultaneous) |
| Baud rates | 2400, 4800, 9600, 19200 (default), 38400, 57600, 115200 bit/s |
| Network addresses | 1 – 254 (for multi-sensor RS-485 bus) |
| RS-485 A wire | Orange-white |
| RS-485 B wire | Whitish-blue |
| RS-232 Tx wire | Pink |
| RS-232 Rx wire | Grey |
| Power (+V) | Brown |
| Ground | White |
Configuration & Power
| Power supply | 7 – 80V DC with reverse polarity protection |
| Power consumption | 0.4W |
| Config tool | Omnicomm Configurator (PC/tablet, USB or RS-232) |
| Data output modes | No output, Binary, Character (auto) |
| Output interval | 1 – 255 seconds (configurable) |
| Remote correction | SMS commands via paired Omnicomm terminal (FW309+) |
| Compatible terminals | Teltonika FMC125, FMB125 (RS-232/RS-485) |
Physical
| Dimensions | 78 × 74 × (24 + measuring piece length) mm |
| Weight | Up to 2 kg (includes measuring piece) |
| Mounting hole | Ø35 mm (bimetal core drill) |
| Min. measuring length | 150 mm |
| Average service life | 8 years |
| Installation | Vertical mounting in tank floor, centre position recommended |
Environmental
| Protection rating | IP69k (high-pressure jet-wash resistant) |
| Operating temp | -60°C to +85°C |
| Relative humidity | 5% to 95% (non-condensing) / max 100% |
| Atmospheric pressure | 84 – 107 kPa |
| Operating mode | Continuous |
| Medium requirement | Dielectric permeability must be constant |
Aether Integration
Connect fuel sensor data to real fleet operations
Aether connects LLS 4 fuel readings — via a paired Teltonika or Omnicomm terminal — into live dashboards, consumption reports, refuel alerts, and theft detection workflows.
- Live fuel level chart showing real-time tank status per vehicle on Aether dashboards.
- Refuel event detection — automatic logging of every fuel fill with volume, time, location, and driver.
- Fuel theft alerts — instant notification when unexpected fuel drop is detected during ignition-off periods.
- Tank calibration support using Omnicomm Configurator — Aether provides installation planning and calibration services per vehicle type.
FAQ
Common questions about Omnicomm LLS 4
The Omnicomm LLS 4 achieves a main reduced error of ±1% across its full measurement range (up to 3000 mm). This level of accuracy enables reliable detection of small fuel thefts, precise refuel volumes, and accurate consumption reporting across different tank geometries.
LLS 4 connects via RS-232 or RS-485 to any compatible telematics terminal. For Aether deployments, it pairs directly with the Teltonika FMC125 (4G, RS-232+RS-485) and FMB125 (2G, RS-232+RS-485). Up to 254 sensors can be daisy-chained on a single RS-485 bus with unique network addresses.
IP69k is the highest standard of dust and water protection — it withstands high-temperature, high-pressure jet washing (80°C, 80–100 bar). This is essential for construction machinery, mining vehicles, and agricultural equipment that are routinely pressure-washed. Standard IP67/IP68 sensors may fail under these conditions.
LLS 4 can be installed in most metal and plastic fuel tanks that use standard diesel, petrol, or mineral oil. It requires a Ø35 mm mounting hole at the deepest, most central point of the tank. The measuring piece must be cut to 20 mm less than the tank depth. It cannot be used with biofuel blends, methanol, ethanol, urea, or water.
Yes. Aether provides installation planning, sensor calibration using Omnicomm Configurator, and platform integration for LLS 4. Tank calibration requires 20+ data points filled in measured intervals — Aether technicians carry calibrated measuring vessels and handle the full calibration-to-platform setup process.
Need help choosing the right tracker?
Share your vehicle type, tank size, and fuel monitoring goals. Aether can design the right LLS 4 + terminal combination and handle sensor calibration for your fleet.