Method and apparatus for detecting toxic gases

Details Method and apparatus for detecting toxic gases Method and apparatus for detecting toxic gases

1989-10-02

1991-10-15

Lacey, David L.

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

436151, 436147, 422 90, 422 93, 422 98, 422 69, 422 88, 338 34, 73 3106, G01N 3000

Patent

active

050574361

ABSTRACT:
Apparatus for detecting the level of ammonia in air comprises a conduit through which air is flowed as an airstream past two ammonia sensors that straddle an ammonia absorber. The apparatus also comprises a signal processing circuit for comparing signals generated by the two ammonia sensors with the difference representing the level of ammonia present in the air.

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