... AC/DC,12~30V AC/DC should indicate when ordering. We can manufacture thousands of different models of products, including Temperature Controller, Digital ... Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay ...