Magnetic Level Switch

General Description
The FM series, side-mounted level sensors, are manufactured specifically for level detection in clean liquids such as oils, water, and chemicals. They are designed for horizontal mounting in a tank or vessel through flanged or threaded connections. To suit many different level sensing situations, a wide variety of models are available.

Operational Description
The FM series contains a hermetically sealed reed switch within the stem or flange and a permanent magnet at the end of the shaft. As the float rises or falls with the liquid level, the magnet activates the reed switch. Changing the mounting orientation can reverse switch action. They work well as high or low level alarm or control for light-duty applications. The FM series can be used in any non-hazardous tanks or vessels. However, they can be used in hazardous locations by connecting with intrinsic safety barriers. (Local approval for the combination system use of Intrinsic Safety standards is required.)