SIGNALLING DEVICE Russian patent published in 1994 - IPC

FIELD: automatics. SUBSTANCE: device has set of sensor 1, each made in form of chamber with detector 2. Before operation initial adjustment is carried out, in particularly, clearing of storage units, resetting of registers. Device operates continuously at zero setting mode, flame spread lower concentration limit setting mode and measuring mode. First two modes are executed successively upon arrival of calibration signal at input 21 of synchronizing signal generator 19. At no such signal, device operates at measuring mode. Each sensor 1 measures explosive gas concentration in all samplers with simultaneous measurement of medium in all samplers. EFFECT: enlarged functional reliability. 3 cl, 4 dwg