Bicycle speed/distance "computers"
Domestic water/shower booster pumps (flow sensing)
Central heating boiler water flow sensor
Miniature DIL relays
Wind direction indicators (the cheaper ones use 8 or 16 reeds)
Bicycle speed/distance "computers"
Domestic water/shower booster pumps (flow sensing)
Central heating boiler water flow sensor
Miniature DIL relays
Wind direction indicators (the cheaper ones use 8 or 16 reeds)