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Fuel Level Sensor — Capacitive RS485

AoooG
AG-RS485

High-precision capacitive fuel level sensor with RS485 digital output. No moving parts, sub-millimetre resolution, and IP67 sealing. Pairs directly with the AV360-RS485 gateway for real-time fuel monitoring on gensets and heavy equipment.

RS485 Digital 99.5% Accuracy <1mm Resolution IP67 -40°C to +85°C 9–37V DC
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STATUS AOOOG AG-RS485 RS485 MOUNTING FLANGE FUEL LEVEL CUT HERE 700mm or 1000mm (cuttable)
Capacitive Fuel Level Sensor
AoooG AG-RS485
Technical Specifications

Full Spec Sheet

Sensing TechnologyCapacitive — no moving parts
Output SignalRS485 Digital (Modbus RTU)
AccuracyUp to 99.5%
Resolution<1 mm (sub-millimetre)
Power Supply9–37V DC
Power Consumption<1W typical
Probe Length700mm or 1000mm standard (cuttable, customizable)
Baud Rate9600 bps default (configurable)
Modbus AddressConfigurable (default: 0x01)
Fuel TypesDiesel, petrol, vegetable oil
Operating Temp-40°C to +85°C
WaterproofIP67 — full immersion rated
Probe MaterialStainless steel 304 / aluminium
MountingFlange mount, compatible with standard sender holes
Config ToolAoooG Portable Configurator V5.7
ManufacturerAoooG Electronics Technology Co., Ltd — China
Integration

Wiring & Setup

RS485 Wiring — AG-RS485 → AV360-RS485
AG-RS485 Fuel Sensor A+ B- V+ GND RS485 A RS485 B 9-37V AV360 ttyS1 port A B V+ GND 4G LTE → Cloud
AV360-RS485 ttyS1
Connect A+ / B- terminals — baud rate 9600
Port 2
Power from Gateway
9–37V DC from gateway power rail — no separate PSU needed
9–37V DC
Modbus RTU Register
Fuel level in FUEL_REG_MAP — address configurable via PC tool
0x01
Why AG-RS485

Precision Fuel Data
No Moving Parts

Sub-mm Resolution
Detects fuel level changes below 1mm. Calculate exact litres consumed per hour for genset fuel efficiency tracking.
No Mechanical Wear
Capacitive technology has zero moving parts. No floats to jam or corrode — works reliably for years in harsh fuel environments.
IP67 Sealed
Fully waterproof probe rated for complete immersion. Safe for outdoor fuel tanks, rain, and condensation environments.
Theft Detection
Sudden drop in fuel level outside of engine runtime triggers a theft alarm. Protect expensive diesel from siphoning at remote sites.
Cuttable Probe
Standard 700mm or 1000mm probe can be cut to match any tank depth. Custom lengths available from the manufacturer.
Proven on Gensets
Already integrated into MONIVA's Genset_monitor_OT.py via ttyS1 at 9600 baud. Plug-and-play with AV360-RS485 gateway.
Compatible With
AV360-RS485 Gateway DSE7320 Gensets Any Diesel Generator Industrial Fuel Tanks Construction Equipment