For selecting a fuel sending unit, what do I need to know before contacting a distributor or sales rep?

You must know the inside tank depth to obtain the proper style of adjustable sender or IntelliSensor® fuel sensor.

You should also determine the resistance of your gauge. Fuel senders have to match the resistance range (measured in ohms) of the gauge. The following are examples of the resistance ranges of gauges and senders:

• Stewart Warner: Full 29-33 ohms / Empty 244-250 ohms
• General Motors: Full 91-93 ohms / Empty 0-2 ohms
• Ford/Chrysler: Full 70-73 ohms / Empty 0-2 ohms

(See question on determining Ohms of a fuel sender if you need guidance.)

What type of environment will the instrument be used in (i.e. highway; off-road; stationary equipment; etc)

Stewart Warner makes a variety of adjustable fuel tank senders for a multitude of applications. Stewart Warner also has the IntelliSensor® fuel sensor available in lenghts from 11" to 26".

NOTE: All Stewart Warner fuel senders meet the SAE standard for five bolt flange pattern.

NOTE: Stewart Warner does not make a direct replacement fuel sender for an automotive OEM application.

You should also provide information on the fuel gauge you will need by following the guidelines in "Selecting a fuel gauge".