VDO Reed Switch 330MM Tank Depth Fuel Sender

The 330 mm VDO Reed Switch Fuel Sender is a specific-length replacement for marine tanks that require a 330 mm vertical probe. Unlike an exposed pivoting-arm sender, its tubular arrangement stays within a narrow area of the tank. VDO part 226-633 identifies the 330 mm model, helping distinguish it from nearby lengths that look very similar.

An accurate tank-depth measurement matters more than the outside appearance of the sender. Check the available space beneath the mounting flange, including any internal baffles, and make sure the tube can be positioned without touching the tank bottom. The catalog lists a 240–33 ohm resistance range, which must also match the receiving fuel gauge.

Stainless-steel construction suits use in a marine fuel system, while the enclosed sensing tube helps lessen the effect of fuel slosh on the gauge indication. The unit is configured for a five-hole SAE top mount and is supplied with a neoprene gasket and mounting hardware. Inspect the sealing surface and test the electrical reading after installation rather than treating a successful physical fit as proof of gauge compatibility.