Pressure stat for nitrogen sensor alarm gauge, dry cleaning part 0804013, old Firbimatic reference A1843, for compatible Union, Realstar, FMB, and commercial dry cleaning machines. Use this replacement pressure stat when servicing nitrogen sensor alarm circuits that require a matching 0804013 pressure-control component. Verify part number 0804013, old reference A1843, pressure range, connection type, electrical rating, and machine fitment before ordering.