Lincoln Service Parts 2 › Lincoln Electric 9SS31227-297 ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH S31227-297 Lincoln Electric 9SS31227-297 ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH S31227-297 Sale Price: $159.65 Original Price: $183.60 ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! ADJUSTABLE DIFFERENTIAL PRESSURE SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1