The Electronic Industrial Timers are used in the industries to control the process/operation with specified time interval of repetitive nature. It is basically a time-clock with an arrangement for on/ off operation/process at a predetermined specified time-intervals. According to the applications many types of timers are use in industries, On-delay Timer (TON), Off-delay timer (TOF), Retentive timer (RTO). Many Types of counters are use in industries Synchronous counter, Asynchronous Counter or Ripple Counter, Up/Down Counter, Decade Counter, Ring counter, Ascaded counter, Johnson counter, Modulus counter.