Timed Electronic Shunt - SB-2000 SeriesThese products are all Made to Order Which means they are non cancelable and non refundable Description Timed Electronic Shunt SB 2000 Series The Timed Electronic Shunt is designed to electronically shunt across a switch or sensor that is being monitored by a normally closed protective loop. It may be set for a 15, 30 or 60 second time delay. The timer may be reset to the initial delay time by depressing the button while the switch is being shunted.