A new high temperature, side mounted, liquid level switch from Gems Sensors can be used where top or bottom switch mounting is impractical.

Level switches are an important warning device against potential disaster should fluid levels fall too low. A typical application is to maintain constant fluid level in a header tank to eliminate the risk of a pump burning out.

Gems Sensors uses its Versaplast polymer material to withstand temperatures up to 300°F (150°C), which is 50% higher than other plastic switches in its LS-7 range. The material is compatible with water, oils and chemicals that can be used with nylon.

Operation is directly related to movement of the fluid’s surface. As the float rises or lowers a magnetic field actuates a hermetically sealed reed switch inside the housing. It can be set as normally open (NO) or normally closed (NC) by turning the switch through 180°. LS-7 switches can be used for high, low or intermediate level sensing. Mounting is through 1/2in NPT ports and the full operating temperature range is –40°F to +300°F (–40°C to +150°C). Maximum pressure is 100psi at 70°F (7 bar at 21°C) and polypropylene versions are also available.