Instrument accepts signals from Photo sensors,
Proximity Switches, Limit Switches, Contact closures,
Encoders, Voltage Pulses... etc... Instrument
can work upto 2KHZ .. of switching frequency.
The incoming signal is filtered, conditioned,
wave shaped with help of filters and choppers.
The signal is fed to synchronous counter I.C.
which drives seven segment display. at the same
time signal is compared with set value. At the
set point relay change over takes place. The relay
can be operated in delayed on, Delayed off, auto
reset modes as per the application.