Nondispersive infrared gas analysis device

Details Nondispersive infrared gas analysis device Nondispersive infrared gas analysis device

1978-07-06

1980-01-15

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01N 2126

Patent

active

041840747

ABSTRACT:
A body has two bores defining two cuvette chambers, one for holding a comparison gas and the other for holding a gas to be analyzed by comparison with the first. An infrared (IR) source at one end of the body provides in-phase radiation into the two cuvettes. At the other end is a window, a selective filter, a reception chamber for each cuvette, and an absorption chamber. The reception chambers are coupled to a device for producing a signal representing the difference in radiation reaching the reception chambers. The reception and absorption chambers are separated by a low reflectance window and the absorption chamber contains an IR absorbing body of glass, polymethacrylate or the like with concentric grooves.

REFERENCES:
patent: 2844729 (1958-07-01), Winterling et al.
patent: 3725702 (1973-04-01), Schaefer

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