Float Switches (HLL)

These Hansen refrigerant float switches (HLL Series) are used to electrically indicate or control a liquid level by opening or closing a SPDT switch. Their simple, reliable design provides long life performance for almost any application.

These refrigerant liquid level float switches are typically installed on a vessel’s liquid level column. They can control liquid level by controlling a liquid fill solenoid valve. Often, they are used to provide high level cutout or alarm. In addition, they can be used to turn off a recirculating liquid pump if a low level occurs. Other applications include control of liquid level via a liquid exit solenoid valve, level indication via a pilot light, and transfer drum operation.

Technical Specifications:

• Size: 1 ¨
• Pressure: 28 bar (40 bar for CO2)
• Temperature: -50ºC/+ 115 ºC
• Connections: ¾” FPT / 1″ Butt Weld combination
• Sepcific gravity: 0.57 to 1.70
• Electrical switch: 120V, 240V, 10 amp SPDT
• Connection: ½” NPSM for conduit, optional DIN plug (3 wire plus ground)
• Suitable for all usual refrigerants including NH3