Patent ID: 6026673
Filing Date: 2000-02-22
Classification: G01N

Abstract:
An electronic device for sensing gas present in an environment, comprising:at least one gas presence sensor providing an electrical output signal;an electronic processing circuit receiving the electrical output signal;at least one electronic memory of permanent type;a first communication line connecting the at least one electronic processing circuit to said electronic circuit;at least one warning device selected from a group comprising optical warning devices, acoustic warning devices, and warning devices providing both an optical and an acoustic alarm;a second communication line connecting the at least one warning device to the electronic circuit;at least one activator apparatus;a third communication line connecting the at least one activator apparatus to said electronic circuit;at least one logic gate;at least one bidirectional serial communication line connecting the electronic circuit to the at least one logic gate forming a serial communication output of the sensing device,wherein, while located in an environment of known gas concentration, the sensing device is put into a condition such that it can be calibrated, said condition being achieved at the moment in which, starting from a rest condition, power is supplied to the sensing device, andat least one external processor feeds a logic command from outside the sensing device to said logic gate by transmitting through said bidirectional serial communication line a plurality of parameters relating to the environment.