INTRODUCTION Model HR-30 is simple, reliable float switch designed for top mounting to tanks or vessels. And give dependable repeatability in the detection of high, low or intermediate loquid levels in almost any tank or vessel. PRINCIPLE A magnet-equipped float the sole moving part moves with liquid level between stops to magnetically actuate a hermetically sealed, glass-enclose HM-95Series 系列液位开关 INTRODUCTION Widely applicable level switch for antioverflow of various liquid tank. Model HM-95 units are siple, reliable float switches designed for top mounting to tanks or vessels. HM-95 units utilize a single switch mechanism and float. PRINCIPLE A permanent magnet is attached to a pivoted switch mechanism. As the float rises following the liquid level, it raises the attraction sleeve into the field of the magnet, which then snaps against the non-magnetic enclosing tube, sctuating the switch mechanism. The enclosing tube provides a static pressure boundary between the switch mechanism and the process. On a falling level, a spring retracts the magnet, deactivating the switch mechanism.