Danfoss pressure switches are block design to survive in the harsh conditions known from machine rooms onboard ships Regulating Range:-0.2 to 4 bar Differential MIN Range: 0.3 bar Differential MAX Range: 0.45 bar Max. Working Pressure: 15 bar Connection Size: Flange Contact Function: SPDT Electrical Connection:Pg 9 plug (DIN 43650 A) Reset: Automatic