OB series timers are easy to operate and have adequate time range as per requirements of pulsejet dust collectors. Seven digits of seven segment display provides all necessary information about running or programming status of timer. The external start reset can be customised for working either on continuity mode or pulse mode. This is a very important feature when using a pressure switch or similar equipment to initiate the timing sequence. This series is extremely user friendly while programming and wiring Comes in a sturdy sheet metal fabricated box for dust protection