Fuel & Water Sender - S5 (5 bolt)

Regular price £40.89
Shipping calculated at checkout.



  • 316 stainless steel
  • SAE 5 hole pattern
  • Nitrile gasket included
  • IP67
  • Simple to install and remove
  • Very reliable
  • Lengths from 150mm - 1600mm + 




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 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 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.

They have proved very reliable and this technology is used by all major European truck and bus manufacturers and on many off road vehicles.

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.

Longer senders and bespoke options are also available, please get in touch to find out more. 

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.



Simply connect one wire to earth and the other wire to the sensor cable on the gauge.


Please note: 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.  

Customer Reviews
4.9 Based on 16 Reviews
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Canada Canada
I recommend this product
work great

As advertised. Would buy again without hesitation.

dan b.
United Kingdom United Kingdom
lovely bit of kit


phil s.
United Kingdom United Kingdom

I spoke with Stuart at Wema seeking advice on what I needed.. Stuart was a veritable mine of information and explained everything I needed in detail. 100% top drawer bloke.one slight moan though.. I ordered and paid for a spare gasket but it never arrived. end result of the job though.. perfect.

Saudi Arabia Saudi Arabia
Good products

Very good product as i used i all my generators

Dico v.
Portugal Portugal
received !

just received it today (exactly 1 month after I ordered it). So I still have to install it ! Kind regards, Dico van Ooijen s.y. ‘PUFF’ the Magic Dragon Lagos Marina, portugal

Wema UK

Hello Dico, I'm sorry you have only just received your order. I can see you placed the order after the cut-off time on Friday 11 December and it was dispatched immediately after the weekend on the Monday 14 December. At the checkout you chose the option to have it shipped by post and not by courier which would have arrived within 3-5 days. As I'm sure you can appreciate, once we hand it over to the post office we are not in control of how long it takes to arrive, especially over Christmas and in the middle of the Covid pandemic and Brexit. Please rest assured that it does not normally take this long to arrive in Portugal. I hope you will be very happy with the sender once you install it but if you have any questions please feel free to email us at hello@wema.co.uk