Ionization monitor with improved ultra-high megohm resistor

Details Ionization monitor with improved ultra-high megohm resistor Ionization monitor with improved ultra-high megohm resistor

1986-10-07

1988-07-05

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250381, 250382, G01T 1185

Patent

active

047556820

ABSTRACT:
An ionization monitor measures extremely small currents using a resistor containing a beta emitter to generate ion-pairs which are collected as current when the device is used as a feedback resistor in an electrometer circuit. By varying the amount of beta emitter, the resistance of the resistor may be varied.

REFERENCES:
patent: 2965847 (1960-12-01), Radley
patent: 3521263 (1970-07-01), Lampart et al.
patent: 3946374 (1976-03-01), McMillian et al.
patent: 3959653 (1976-05-01), Lee et al.
patent: 4012729 (1977-03-01), Weaver et al.
patent: 4044263 (1977-08-01), Ried, Jr. et al.
patent: 4081684 (1978-03-01), Wieder
patent: 4243981 (1981-01-01), Beyersdorf
patent: 4258261 (1981-03-01), Conforti
patent: 4286160 (1981-08-01), Ried, Jr.
patent: 4336454 (1982-06-01), Bryant et al.

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