Indicator Universal input:including mV, mA, V, A,TC, RTD, PT100; ... relay outputs. Applicate to any non-linearity sensor. Universal input Indicator for sensor (DL) 1) Universal input:4-20mA, DC 0 ... Controller Current/Voltage/Power meter,various sensor indicator Frequency / Tacho / Batch / Length /Linespeed Meter Flow / Level /Pressure Controller Proximity/ Photoelectrical Switch Timer ...