S3U Series Threaded Fuel/Water Tank Sensors - 21"

Wema's most versatile senders are the SSS/SSL, S3U, and S5U models. These single stainless steel senders typically have an NBR (Nitrile Butadiene Rubber) float, and differ only in their mounting methods.
SSS/SSL has a basic SAE 5-hole pattern, and typically mounts with gasket and screws; S3U has a 1.25" BSP threaded mount; S5U has a 1.5" NPT threaded mount.
These single stainless steel models can be used in water, gasoline, hydraulic oil, or diesel.

The S3U sensor has a float which rises and falls on the central shaft with the level of liquid in the tank.
The sensor unit is fully insulated to protect against dangerous electric currents inside the tanks.
This is an extremely important safety feature, because it protects against electrolytic corrosion, as well as the danger of an explosion when used with gasoline.

The sensor threads are 1.25" BSP - straight male British pipe thread - with O-ring seal.
Use this sensor with a threaded Top Adapter (FL-2WE) (see Related Products, below) which will bolt to either a standard American SAE 5-hole mount (2.125" bolt circle), or the larger European 5-hole mount pattern, on your tank.

The sending unit length is measured from the top of the threads to the tip of the gauge.
It should be at least 1" less than the depth of a plastic tank, and 3/4" less than the depth of a metal tank.
Note: if the top of your metal tank flexes, deduct one (1) inch from the depth (like a plastic tank).

• For use with diesel, gasoline or water
• Availble in Imperial lengths in 1" increments from 4" to 60"; also available in Metric lengths
• Can be used with any Wema System dash gauge
• Sensor electrical resisitance range is 240-33 Ohms (Standard Aftermarket)
• All 316 stainless steel
• Includes 38mm and 43mm O-rings for sealing
• Odd lengths can be special ordered
• Available in Imperial and Metric measurements