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Accurate & Reliable Fuel Level Sensors for Vehicles, Generators & Industrial Tanks

Leading manufacturer of CANBUS, J1939, and Analog output sensors. High-resolution (5mm) measurement for Generators, Fleet Management, and Marine tanks.
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Overview Content

Fuel level sensors are critical components for monitoring fuel consumption, preventing fuel theft, and ensuring safe operation of vehicles and generators. Bluefin fuel level sensors are based on the design of "float+Reed Switch" and “float+TMR", and output signal variants of analog resistance/voltage/current, or CANBUS(J1939)/RS485 digital type, which are most popular in industries for diesel, gasoline, oil, and water tanks.
Fuel Level Sensor Products
S5-450 Generator Diesel Tank Float Type Stainless Steel 304 Level Monitoring Sensor
Resistive-output
S5-450 Generator Diesel Tank Float Type Stainless Steel 304 Level Monitoring Sensor
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Top Mounted Stainless Steel Nut-lock Type Single Float Level Switch
Level Switch
Top Mounted Stainless Steel Nut-lock Type Single Float Level Switch
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FDA Compliance Food Grade Drinking Water And Milk Level Monitoring Systems Sensor
BFS-380 Level Sensor (stainless-steel Stem)
FDA Compliance Food Grade Drinking Water And Milk Level Monitoring Systems Sensor
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S5-250 CANBUS/J1939 Compliant for Accurate Telemetry SAE-5 Flange Mount Fuel Level Sensor
CANBUS Output (J1939)
S5-250 CANBUS/J1939 Compliant for Accurate Telemetry SAE-5 Flange Mount Fuel Level Sensor
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Solutions for Every Application
  • Digital Smart Series (CANBUS, RS485)
    Digital Smart Series (CANBUS, RS485)
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  • All-in-one Integrated Level Sensor
    All-in-one Integrated Level Sensor
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  • Low-Profile Specialist
    Low-Profile Specialist
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  • Mechanical & Basic
    Mechanical & Basic
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Why Choose Bluefin Sensors?

High Precision

Down to 10mm/7mm/5mm in resolution; leading-edge designs.

Robust Material

SUS304/316 Stainless steel for anti-corrosion.

Wide Range Selection Of Signal Output

0-190ohm, 240-33ohm, 4-20mA, and J1939.

Minimized Dead Zone

Optimized design for low-profile tanks, with state-of-the-art electronics and floats.

Your Partner for OEM/ODM Solutions

Can't find the right size? We offer custom probe lengths, flange types (SAE 5-bolt/6-bolt), and signal outputs tailored to your specific tank geometry. Bluefin supports OEM & ODM customization, including:
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Tank Height & Mounting Pattern
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Output Signal Customization
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Connector & Cable Options
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Branding Of User's Logo And The Artwork

Engineering Support & Documentation

Access of full data sheets, installation guides, and wiring diagrams for our entire S5, BS, and TN series.
Name Size Downloads Update Download
Mechanical level gauge.pdf 5.86MB 5602 2026-05-24
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Fuel tank level sensor.pdf 1.97MB 5640 2026-05-24
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Quality & Manufacturing

 100% functional inspection and testing for each sensor
 100% sealing test on all mechanical assembly
CE compliant
FAQ
  • What output signals are available?
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    CANBUS J1939, RS485, 4–20mA, 0-5Vdc, resistance, and other customized outputs.
  • Can sensors be customized for different tank heights?
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    Yes, we support full customization (from 80mm to 2500mm in tank's height)
  • Are the sensors suitable for diesel and gasoline?
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    Yes, compatible with diesel, gasoline, kerosene, oil, and water.
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S5-450 Generator Diesel Tank Float Type Stainless Steel 304 Level Monitoring Sensor
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Top Mounted Stainless Steel Nut-lock Type Single Float Level Switch
Top Mounted Stainless Steel Nut-lock Type Single Float Level Switch

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FDA Compliance Food Grade Drinking Water And Milk Level Monitoring Systems Sensor
FDA Compliance Food Grade Drinking Water And Milk Level Monitoring Systems Sensor

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S5-250 CANBUS/J1939 Compliant for Accurate Telemetry SAE-5 Flange Mount Fuel Level Sensor
S5-250 CANBUS/J1939 Compliant for Accurate Telemetry SAE-5 Flange Mount Fuel Level Sensor

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S5-300 Automotive Network Stainless Steel 304 CANBUS And Resistance Dual Output Level Sensor for Coolant Levels
S5-300 Automotive Network Stainless Steel 304 CANBUS And Resistance Dual Output Level Sensor for Coolant Levels

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CANBUS, J1939 Signal Output Fuel Tank Level Sensor
CANBUS, J1939 Signal Output Fuel Tank Level Sensor

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S5-400 Stainless Steel Dual-output Date-tranmission Float Type Level Control Sensor for Automotive And Industrial Systems
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S5-200 CANBUS Output SAE-5 Hole Flange Mount High-speed Data Transfer Fuel Level Sensor, J1939 Compliant
S5-200 CANBUS Output SAE-5 Hole Flange Mount High-speed Data Transfer Fuel Level Sensor, J1939 Compliant

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S5-350 SAE-5 Bolts Flange Mount Stainless Steel Float Type 21mm in Precision Controller Area Network (CAN) Protocol Level Sensor
S5-350 SAE-5 Bolts Flange Mount Stainless Steel Float Type 21mm in Precision Controller Area Network (CAN) Protocol Level Sensor

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SAE-5 Hole Flange Mount Fuel/Water/Liquid/Oil Tank Level Sensor with Integrated Gauge
SAE-5 Hole Flange Mount Fuel/Water/Liquid/Oil Tank Level Sensor with Integrated Gauge

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5mm High Resolution 4-20mA Output Stainless Steel Level Sensor Integrated with Level Gauge Display
5mm High Resolution 4-20mA Output Stainless Steel Level Sensor Integrated with Level Gauge Display

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S5-400 21mm Resolution 4-20mA Level Sensor with Integrated PCB for Generator/genset Tank
S5-400 21mm Resolution 4-20mA Level Sensor with Integrated PCB for Generator/genset Tank

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SAE-5 Hole Bolts Flange Mount Stainless Steel Float Type Magnetic Reed Switch Fuel Tank Level Sensor with LED Digit Display
SAE-5 Hole Bolts Flange Mount Stainless Steel Float Type Magnetic Reed Switch Fuel Tank Level Sensor with LED Digit Display

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S5-250 4-20mA Current Output Stainless Steel Level Sensor with Built-in PCB for Chemical Tank
S5-250 4-20mA Current Output Stainless Steel Level Sensor with Built-in PCB for Chemical Tank

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S5-300 Vehicle Remote Control Level Sensor with 4-20mA Output And 21mm Precision
S5-300 Vehicle Remote Control Level Sensor with 4-20mA Output And 21mm Precision

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S5-350 High-Resolution 4-20mA Current Output Stainless Steel 304 Probe And Float Level Sensor for Bio-diesel Tank
S5-350 High-Resolution 4-20mA Current Output Stainless Steel 304 Probe And Float Level Sensor for Bio-diesel Tank

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S5-200 4-20mA Output 21mm-in-resolution Level Sensor with Built-in PCB on The Head Unit for Vehicle Fleet Management
S5-200 4-20mA Output 21mm-in-resolution Level Sensor with Built-in PCB on The Head Unit for Vehicle Fleet Management

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Robust Aluminum Mechanism No Power Supply Spiral Content Gauge for Golf Kart/Lawn Mower
Robust Aluminum Mechanism No Power Supply Spiral Content Gauge for Golf Kart/Lawn Mower

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PMGC-200 Thread in Mechanical Spiral Content Level Gauge Meter for Generator/Genset Water/Diesel/Oil/Fuel Tank
PMGC-200 Thread in Mechanical Spiral Content Level Gauge Meter for Generator/Genset Water/Diesel/Oil/Fuel Tank

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BSP 1 1/2" Thread-in Type Mechanical Level Gauge for Power Generator Fuel Tank
BSP 1 1/2" Thread-in Type Mechanical Level Gauge for Power Generator Fuel Tank

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Looking for a Reliable Fuel Level Sensor Manufacturer?

Share with us your tank type, application, and signal output requirements. Our engineers will work out the recommended design within 1-2 working days, and complete prototyping within 1-2 weeks.
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No. 1, Hengling, Tiansheng lake, Roma, Qingxi Town, Dongguan City, Guangdong Province , China
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Tel: +86 186 7515 2690
Email: sales@bluefin-sensor.com
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