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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
Water /fuel /coolant Tank Side Mounted Stainless Steel Low Alarm Level Switch
Level Switch
Water /fuel /coolant Tank Side Mounted Stainless Steel Low Alarm Level Switch
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6-hole PA66 Flange Pack for Mechanical Level Gauge Mounting
BSP 1 1/2" Thread
6-hole PA66 Flange Pack for Mechanical Level Gauge Mounting
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Add to Basket
Steel/aluminum Welding Adaptor/flange for Mechanical Level Gauge Mounting
BSP 1 1/2" Thread
Steel/aluminum Welding Adaptor/flange for Mechanical Level Gauge Mounting
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Add to Basket
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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Add to Basket
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 6233 2026-05-24
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Fuel tank level sensor.pdf 1.97MB 6231 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.
Related Products
Learn More
Water /fuel /coolant Tank Side Mounted Stainless Steel Low Alarm Level Switch
Water /fuel /coolant Tank Side Mounted Stainless Steel Low Alarm Level Switch

Learn More

6-hole PA66 Flange Pack for Mechanical Level Gauge Mounting
6-hole PA66 Flange Pack for Mechanical Level Gauge Mounting

Learn More

Steel/aluminum Welding Adaptor/flange for Mechanical Level Gauge Mounting
Steel/aluminum Welding Adaptor/flange for Mechanical Level Gauge Mounting

Learn More

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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Float Type Mechanical Diesel Level Gauge To Indicate The Level of Liquid in Leaf-Blower Tank
Float Type Mechanical Diesel Level Gauge To Indicate The Level of Liquid in Leaf-Blower Tank

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M45*2 thread in Customized Length From 110~1500mm Mechanical Level Meter for Light Tower
M45*2 thread in Customized Length From 110~1500mm Mechanical Level Meter for Light Tower

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M45*2 thread in Level Measuring Display Gauge for Stationary or mobile fuel tank
M45*2 thread in Level Measuring Display Gauge for Stationary or mobile fuel tank

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NPT 1 1/2" thread-in 300mm in Length Spiral Content Gauge for Air Compressor
NPT 1 1/2" thread-in 300mm in Length Spiral Content Gauge for Air Compressor

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NPT 1 1/2" thread-in Mechanical Grey Water/holding Tank Level Sensor Meter for Recreation Vehicles
NPT 1 1/2" thread-in Mechanical Grey Water/holding Tank Level Sensor Meter for Recreation Vehicles

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NPT 1 1/2" thread-in Fuel/oil/gasoline Cap Gauge for Construction Machineries
NPT 1 1/2" thread-in Fuel/oil/gasoline Cap Gauge for Construction Machineries

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NPT 1 1/2" thread-in type mechanical spiral content gauge for small vehicles
NPT 1 1/2" thread-in type mechanical spiral content gauge for small vehicles

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SAE-5 Hole Flange Pattern Mechanical Level Sensor And Gauge for Transfer Tank & Holding Tank
SAE-5 Hole Flange Pattern Mechanical Level Sensor And Gauge for Transfer Tank & Holding Tank

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Mechanical Fuel Level Measuring Sensor And Display Gauge And Indicator for Subbase Tank
Mechanical Fuel Level Measuring Sensor And Display Gauge And Indicator for Subbase Tank

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Fuel Cap And Gauge Construction Machineries /waste Tank Gauge
Fuel Cap And Gauge Construction Machineries /waste Tank Gauge

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Side Mount Resistance Analog Output 10mm Or 21mm Resolution SAE-5 Hole Flange Mount Level Sensor
Side Mount Resistance Analog Output 10mm Or 21mm Resolution SAE-5 Hole Flange Mount Level Sensor

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S5L-300 90 Degree Side Mount Stainless Steel Resistance Output Level Sensor
S5L-300 90 Degree Side Mount Stainless Steel Resistance Output Level Sensor

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0-190ohm Or 240-33ohm Analog Output 10mm Or 21mm Resolution SAE-5 Hole Flange Mount Level Sensor
0-190ohm Or 240-33ohm Analog Output 10mm Or 21mm Resolution SAE-5 Hole Flange Mount Level Sensor

Learn More

S5-250 0-190ohm Or 240-33ohm Analog Output Signal Stainless Steel Water Tank Level Sensor
S5-250 0-190ohm Or 240-33ohm Analog Output Signal Stainless Steel Water Tank Level Sensor

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S5-350 SAE-5 Bolts Flange Mount Recreation Vehicles & RV Tank Oil/fuel Level Sensor
S5-350 SAE-5 Bolts Flange Mount Recreation Vehicles & RV Tank Oil/fuel Level Sensor

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S5-400 0-190ohm Resistive Output Bio-chemical Spray Tank Sensor /recreation Vehicles Sensor
S5-400 0-190ohm Resistive Output Bio-chemical Spray Tank Sensor /recreation Vehicles Sensor

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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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