... Range:-1999~1999; Sampling:>4s/sec. DP3A series big inch Digital Ampere Meter Features:1) Signal Input:selected by ... of different models of products, including Temperature Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor ... Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ...