The Danfoss MP55 is a differential pressure control switch designed to safeguard refrigeration compressors against low lubricating oil pressure. If the oil pressure fails, the switch stops the compressor after a pre-set time delay. This essential safety device is used in commercial and industrial refrigeration and air conditioning systems. The MP55 is known for its reliability, robust design, and precise operation, ensuring the longevity and efficient performance of the compressor. It features a manual reset function, which prevents the compressor from restarting until the fault has been investigated and cleared by a technician.