Byson Dual Pressure Control Switch Refrigeration HP & LP - Auto ResetCan be used not only in fluoride refrigeration, but also in air and liquid Protect compressors in refrigeration and air condition plant, and keep them from over low pressure or over high suction pressure Switch Type SPDT Low pressure Adjust Range: 0. 5 6 Bar 7 87 PSI Differential: 1 4 High Pressure Adjust Range: 5 30 Bar 72 435 PSI Differential: Fixed <=4 Reset Type Low Pressure: Auto High Pressure: Manual Voltage AC 110V, 24A AC 220V, 16A Thread