Dennison, Schultz, Dougherty & MacDonald
Gas detection instrument and method for its operation
A gas detection instrument comprises a combustible gas sensor and associated circuitry, which supplies power to the sensor and measures and displays resulting sensor response. The supplied power is switched between timed pulses of electricity and steady state electricity, with the intermittent electricity being employed only when no significant change in sensor output has been detected. Alternatively, timed pulses of electricity are maintained, and predictive software algorithms are used to give readings for gas concentration during interruption of the power supply. The sensor operation enables the instrument to respond to rapid changes in gas concentration while minimizing power consumption of the sensor.
Industrial Scientific Corporation
G G G G
G01N G08B G08B G08B
inventional inventional inventional inventional
Chuan-Bao David C. Wenfeng
Wang Green Peng