Quantitative measuring system for combustible gas with audible tick rate
Patent
·
OSTI ID:6884374
Northern Illinois Gas Co.'s new gas-detection instrument is lightweight, portable, easy to use, and in compliance with industry standards as an intrinsically safe device. The instrument uses a semiconductor gas-sensor element energyzed with the regulated voltage source. Placed in the atmosphere to be tested, the detector generates a signal representative of the concentration of natural gas in the air. A meter displays the signal to determine whether the area is hazardous; a variable-repetition-rate blocking oscillator feeding a speaker responds to the signal, generating an audible tick rate useful in locating a leak.
- Assignee:
- Northern Illinois Gas Co.
- Patent Number(s):
- US 4166380
- OSTI ID:
- 6884374
- Country of Publication:
- United States
- Language:
- English
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