The motion of float 3 is transmitted to rocker arm 4 and lever 5 which passes through bellows 6 to ensure complete airtightness of the outlet. Spiral spring 8 tends to turn lever 1 to its extreme position in which arm 7 contacts lever 5. The fuel level in the tank is registered by lever 1 which slides along the coil of potentiometer 2. Leads 9 of the potentiometer are connected to an electric instrument which indicates the gasoline level in the tank.
$3939$LHP,M$