INTRODUCTION
The reed switch relies on two basic scientific principles namely: buoyancy and magnetism. Buoyancy causes the float (which contains a magnet) to rise with the liquid and magnetism helps open and close the switch. Since this product's this product has been introduced to the market, it has seen significant improvement and advances with regards to convenience, safety and lowering costs.
The float switches are extremely compact, simple and are easy to install on any small locations.
These switches are not affected by electrical interference and can withstand chemicals, high temperatures and pressures if the correct material of float switch is selected.

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WORKING PRINCIPLE
Fig. 1 i lustrates the pivot activation (FCH Type reed switch). When float's magnet is moved close to the switch's stationary stem, the float magnet pushes the stem's switch circuit together and closes the electrical circuit. When the float magnet is moved away from the stem, the switch circuit separates and the circuit is opened.

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The FC/FD Series is a mini magnetic float level switch product line that is very cost-effective and compact. As such these magnetic float level switch units are easily installed on small machinery and in areas where very little space is available inside/outside the vessel in which they are installed.