Portable measuring device for detecting hazardous gas concentration in air - has chassis carrying circuit board, hinged to move in longitudinal and transverse directions within housing having sealing surface pressed on all sides via central bolt

摘要

The device uses a measurement cell and consists of a housing part contg. a circuit board (3) for electronic power components and a housing cover (4). The circuit board is carried by a chassis (2) which is linked to the cover so as to be movable longitudinally and transversely. The cover is pressed against the housing uniformly on all sides at a sealing surface by a central bolt (17). The measuring cell housing (5) may be connected to the chassis via a bolt (9) or bayonet coupling. ADVANTAGE - Enables rapid effective sealing of housing section contg. electronic parts. Interchangeable measurement cell can be effectively locked inside housing.