Alarm systems are of crucial importance in ensuring safety and efficiency of industrial
installations. In practice, alarm systems are not properly designed or given the attention they
deserve; their performance is unsatisfactory. The main role of alarms is to inform the
operator of any incident in the plant. Regrettably, most occurred alarms are false and
nuisance. To avoid this, industrial community developed techniques like deadbands, filters
and delay-timers. Delay-timer is largely exercised in industry. This article presents a new …