... parameter display,such as temperature, level,flow. Precise control,analog output, data collection and communication processing ... backward control. For example, 4-20mA output for analog output or proportion control. Digital outpt: up ... and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, ...