Photoionization detector

Details Photoionization detector Photoionization detector

1982-03-02

1983-08-09

Tokar, Michael J.

Electricity: measuring and testing

Using ionization effects

For analysis of gas, vapor, or particles of matter

324464, G01N 2700

Patent

active

043981526

ABSTRACT:
A gas discharge tube is provided for use in a detector of the type capable of identifying ionizable species in a carrier gas. The tube contains an inert gas at reduced pressure and the gas is excited by an external circuit including a coil about the tube. The circuit generates a radio frequency which excites the gas and emits ultraviolet radiation. This radiation passes through a transversely located window at the end of the tube for ionizing the species in a chamber. Electrodes are also described for use in association with the chamber to sense ionization. These electrodes form part of a sensing circuit.

REFERENCES:
patent: 2544078 (1951-03-01), Glassbrook
patent: 3223873 (1965-12-01), Hampton

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