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Home / Lighting / Driving & light bars

Wema Fuel/Water Tank Level Sender Threaded 0-190 Ohms

Wema

Fuel/Water Tank Level Sender Threaded 0-190 Ohms

S3-E150

The S3 sender is an innovative solution for monitoring the level of fuel and/or water tanks in boats, trucks, coaches, caravans and recreational vehicles. With the float as the only moving external part, the S3 is designed with longevity, durability…

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Important note

Wema’s S3 sender is designed for durability and precision in harsh environments. Ensure your gauge matches the 0–190 Ohm resistance for accurate readings.

Size
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Ideal for boats, trucks, motorhomes, caravans, and recreational vehicles.

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The S3 sender is an innovative solution for monitoring the level of fuel and/or water tanks in boats, trucks, coaches, caravans and recreational vehicles. With the float as the only moving external part, the S3 is designed with longevity, durability and performance in mind. Constructed in AISI 316 stainless steel, it’s suitable for a wide range of mediums including diesel, petrol, oil, potable and grey water. It mounts via a 1 1/4" BSP (British Standard Pipe Parallel) fitting and can be simply screwed into the top of a matching tank. The connection cable has a sealed entry into the top of the sender for water resistance. Made from non-corrosive materials to withstand harsh environments, WEMA takes an uncompromising stance on quality; their level sensors meet all applicable ISO, CE, NMMA, ABYC and USCG standards. Rated 0-190 Ohm — you must match the same Ohms rated senders with gauges.

  • Float-based sensor with no external moving parts
  • Sealed cable entry for water resistance
  • Compatible with UFW and SUF sensors
  • ISO, CE, NMMA, ABYC and USCG compliant


Resistance: 0–190 Ohm

Operating Voltage: 12/24 VDC

Mounting: 1 1/4" BSP

Material: AISI 316 Stainless Steel

Temperature Range: -40° to +85°C

Cable: 290mm sheathed, tinned leads

Compatible Fluids: Diesel, Petrol, Oil, Potable and Grey Water


Length is measured from the underside of the flange to the base of the shaft. Longer senders available on request.

Everything this install needs

0 of 0 in the box


Mounts using a 1 1/4" BSP thread directly into compatible tanks. Ensure correct orientation and sealing. Includes 290mm flying leads for wiring. Match sender length to tank depth.

Ideal for boats, trucks, motorhomes, caravans, and recreational vehicles.


Q: Can I use this sender with a black water tank?

A: No, it's not rated for black water use.

Q: What happens if I mismatch the Ohm rating?

A: Your fuel or water gauge will display incorrect readings.

Q: How do I test if it’s working?

A: Connect to a multimeter and move the float—resistance should range from 0 Ohm (empty) to 190 Ohm (full).

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