The LANCIER CoverSensorBasic has been specially developed for the monitoring of manhole covers and other building openings. Its self-contained design and the materials used have been engineered for use in harsh environments, such as those found in manhole structures. It is equipped with a pre-mounted bracket for quick and easy installation.

The CoverSensorBasic (1) is equipped with a spring-loaded rotary head switch (2). It is screwed firmly to a manhole wall, for example, so that it is in permanent and pretensioned contact with the manhole cover (3). The spring-loaded rotary head is pretensioned to compensate for tilting movements of the manhole cover. Mounting on doors and other building openings is similar.

For monitoring, an internal dry contact is read out by means of a four-wire measuring cable (4).  
When the manhole cover/door is opened, the switching state of the contact changes, whereby the affected building opening is detected and reported by the LANCIER monitoring system.

The alarm is triggered decentrally via relay outputs or via Modbus to a remote control system or via IP network to the universal monitoring platform UMS.