Internal Top Mounted Single Level Switches are designed for vertical mounting at the top of the vessel and has connection through screwed or flanged ends. The Switches are suitable for liquid with specified gravity of 0.5 to 1.4 and are operated by magnetic piston which actuates the magnetic proximity switch. The Switches are used for single level control. The Internal Top Mounted Single Level Switches are suitable for high immersion depths up to 1 meter.