Low fuel sensor innards

It’s just a resistor.
EDIT: Resistance is .55v when its dry and below that wet. It has a marker at the top of the assembly that says 55 - 8,4
I know several folks have broken ones so figured I would share. Actually I dunno if this one works or not but it does respond to moisture so I can only assume it does!

 

I think it's a thermistor & it may be a 1k ohm. From an old reply of mine:

Resistance values & info from my notes. tests done using a VC97 digital multimeter:
Stock fuel level switch on motorcycle, fuel tank full of gasoline & switch submersed in fuel = 4.4 k ohms.
I've never tested the resistance of that fuel switch in air or when the tank was empty.
NOS fuel level switch (27010-1096) = 1.2 k ohms in air.  I've never tested the resistance of the nos fuel switch in fuel.
(1.28 k Ω @ 76F & 1.22 k Ω @ 88F, so the resistance goes down the warmer it gets. I think there's a thermistor in the little can).

 

wrote:

I think it's a thermistor & it may be a 1k ohm. From an old reply of mine:

Resistance values & info from my notes. tests done using a VC97 digital multimeter:
Stock fuel level switch on motorcycle, fuel tank full of gasoline & switch submersed in fuel = 4.4 k ohms.
I've never tested the resistance of that fuel switch in air or when the tank was empty.
NOS fuel level switch (27010-1096) = 1.2 k ohms in air.  I've never tested the resistance of the nos fuel switch in fuel.
(1.28 k Ω @ 76F & 1.22 k Ω @ 88F, so the resistance goes down the warmer it gets. I think there's a thermistor in the little can).


 

This is also known as an NTC (negative temperature coefficient) sensor. The idea is the gauge is simply a voltmeter and the lower the resistance gets, the higher the gauge reads (also used for temperature gauges)

Thanks. In the past I've searched for NTC thermistors in case I ever need one or for some shade tree experimenting. I'm assuming a good match to stock would be an axial 1k ohm.  

ps: the fuel switch tends to leak around the red plastic piece w the terminal rivet, so I used Permatex liquid metal to seal it. That was more than 5 yrs ago w no leaks. Seal-All is another product that might could be used.  It's resistant to gasoline & seems readily available. I've never used it, though.