TRAFAG

electrical measurement, signaling, control devices and instruments, namely, [ amperemeters, multimeters, voltmeters and PH-meters; ] temperature sensors, pressure sensors, density sensors, [ PH-electrodes and PH-sensors; ] temperature transmitters, pressure transmitters, density transmitters; temperature indicators, pressure indicators, density indicators, [ and PH-indicators; ] thermostats, pressure switches, and density controls