Senders are available with either a 5 hole flange (S5) or a 1 ¼” BSP male thread (S3) and are made in a series of lengths from 150mm - 1600mm.
There are two standard resistances, 0-190 ohm, used mainly in European gauges and 240-30 ohm used by American gauge manufacturers. Senders and gauges must have the same resistance range.
The Wema S5 fuel and water sender is also suitable for use in oil level sender & many other liquids. (contact us for confirmation if using for unusual use)
Robustly made from 316 stainless steel and fitted as original equipment for over 30 years by all the major British and European boat builders, our fuel and water senders still work on the simple principle of twin magnets in the float tripping a series of reed switches securely housed, and doubly insulated inside the stainless tube.
Over the years senders have been improved with advances in reed switch technology, allowing us to fit far more switches inside the senders, giving the better resolution required by modern digital displays.
We now offer high-resolution S5 fuel and water senders from 150mm to 400mm.
These senders are the same as the standard-resolution in every way except we have placed the switches at ~every 10mm instead of ~every 20mm giving you more accuracy and clarity in the shallowest of tanks.
The S5 senders have proved very reliable and this Wema technology is used by all major European truck and bus manufacturers and on many off road and military vehicles.
Longer senders and bespoke options are also available including different outputs; 0-5v, 0-10v, 4-20ma... Please get in touch to find out more.
The Wema S5 Fuel and Water Sender can also be used as a position sensor; mounting the sender to one part and clamping the float to the other moving part.
If sender length/resistance is out of stock then we can normally supply you with an S3 sender and FL2 flange for the same price as an S5.
Please contact us if the website shows product is out of stock and we can advise lead time or suggest an alternative solution.
[Please note: the code 001306 refers to the S5 head]
S5 Fuel and Water Sender Specifications
316 stainless steel
0-190 ohms or 240-30 ohms
Simple to install and remove
Lengths from 150mm - 1600mm +
Use these torque settings when attaching an S5 sender to a tank: 1.7Nm – 2.0Nm