Abstract: A liquid level indicating device such as the fuel gauge 10 in a motor vehicle is of the type which does not return to zero when the ignition 24 is switched of. In order to prevent false readings arising when the fuel in the tank sloshes about, a tilt switch 22 is provided in series with the ignition switch to depower the fuel gauge 10, which then continues to register the previous reading, if the motion or attitude of the vehicle changes. The tilt switch will close when the vehicle returns to a low level of acceleration and a level attitude operating state and power will be restored to the gauge. The gauge then reverts to direct reading of the signal from a sender unit 28 in the fuel tank.