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Hi FreightTrain, The buzzer cutoff is fail safe. If the relay does not operate, the buzzer will keep on buzzing. I do have the dash warning light seperate from the buzzer (in parallel) so if one fails , the other will get my attention of a low air problem. I do not like surprises either. Will...

Hello Group, I use a latching relay to control the Low Air Buzzer. When the buzzer goes off, I push the button to latch the relay. When air pressure is up, battery is removed from the relay. This releases the relay, reseting the buzzer . The buzzer will sound the next time there is low air...