The REEFE RMP Range of Pressure Switches is a high-quality, reliable pressure with for controlling water pressure booster sets in conjunction with an expansion vessel. The pressure switch has an adjustable cutout and differential (cut-in) pressure to suit your application. The switch will work with fresh water and seawater and there is a 1/4" female BSP connection, with an electrical connection via screw terminals. These 2 pole N/C (normally closed) pressure switches are suitable for single-phase pumps up to 1.5 kW or as a digital signal to control 3-phase pumps using a control panel. The RMP-CONTROL Control Switch is ideal for dedicated control panel applications with N/C (Normally Closed) and N/O (Normally Open) contacts. These switches are an ideal replacement for Square D and XMP Pressure Switches