PROGRAMMABLE LOGIC CONTROLLERS(PLC) HUMAN MACHINE INTERFACE(HMI) COUNTERS & TIMERS ENCODERS TEMPERATURE SENSORS PROXIMITY SENSORS PHOTOELECTRIC SENSORS FIBRE OPTIC SENSORS PRESSURE SENSORS PRESSURE TRANSDUCERS FLOW SENSORS FLOW METERS PRESSURE SWITCHES INTELLIGENT RELAYS SAFETY RELAYS TIMER RELAYS TIMERS LIMIT SWITCHES POWER SUPPLY UNITS(SMPS) CONTROL RELAYS