mpo55Danfoss MP 55 Differential Pressure switches delay of relay 90 sec. 060B017291 Adjustment Cut out for falling pressure. Ambient temperature -40 - 60 °C. Ambient temperature -40 - 140 °F. Ammonia application No. Approval CCC, CE,Discover LG 23MP55HQ. Click for pictures, reviews, and tech specs for the LG LG IPS Monitor MP55.