Electronic instruments, namely level switches and level indicators for monitoring and controlling liquids in tanks and vessels, level switches and level indicators for monitoring and controlling granular and pellatized solids in tanks and vessels, magnetostrictive electronic signal transmitters measuring level, interface and temperature, radio frequency liquid level detectors, sound wave liquid level electronic signal transmitters, control electronic signal transmitter for operation with a level detector, and combination glass gauge and magnetic level indicator
Electrical and Scientific Apparatus