Part Number: 1-1224-99 (Differential press switch)Part Number: 21SN04-180A (Differential press switch)Part Number: 420167 (Differential press switch)Part Number: 7183A000 (Differential press switch)Part Number: 774206 (Differential press switch)Part Number: C668516-0101 (Differential press switch)Part Number: S322T004-26 (Differential press switch)Part Number: S322T004-7 (Differential press switch)Part Number: S332T004-3 (Differential press switch)