Amperometric carbon monoxide sensor module for residential alarm

Details Amperometric carbon monoxide sensor module for residential alarm Amperometric carbon monoxide sensor module for residential alarm

1992-04-06

1994-07-19

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340628, 204406, G08B 1710

Patent

active

053313100

ABSTRACT:
A relatively inexpensive modular component that can be substituted for, or used in conjunction with, an existing smoke detector in a commercially available residential fire-detection alarm comprises: (A) an amperometric sensor for carbon monoxide, in which the reference and counter electrodes are combined either internally into a single auxiliary electrode or externally by electrical shorting; and (b) a simple current-to-voltage converter circuit that converts the current signals from the sensing electrode into amplified voltage signals. The converter circuit is powered by the same battery (usually a 9-volt dry cell) and is connected to the same alarm-triggering circuit that are used in existing residential fire alarms. The sensor-and-converter module is designed to fit into a commercially available smoke-detector-type fire alarm unit. The electrical output of the module is designed to be compatible with the electrical input requirements of the commercial detection circuitry. An alarm fitted with this module provides early warning of hazardous conditions, such as a smoldering fire, a leaky furnace, or an otherwise heavily polluted atmosphere.

REFERENCES:
patent: 3776832 (1973-12-01), Oswin et al.
patent: 4171253 (1979-10-01), Nolan et al.
patent: 4688021 (1987-08-01), Buck et al.
patent: 4767994 (1988-08-01), Hopkins et al.
patent: 4874500 (1989-10-01), Madou et al.

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