... etc), contact switch, encoder, etc, used to measure power frequency (AC 0-- 600V), range: 0.01Hz--100KHz (max 100KHz), ... selectable; high value, low value, intervals, etc. analogue output 4-20mA or 0-10mA with range settable.5 ... (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, ...