Nutating probe for gas analysis

Details Nutating probe for gas analysis Nutating probe for gas analysis

1983-05-31

1984-04-10

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204415, G01N 2730

Patent

active

044419791

ABSTRACT:
A probe immersible in process water or wastewater having oxygen, chlorine or another gas dissolved therein and adapted to continuously and accurately measure the concentration of the gas. The probe includes a noble metal measuring electrode, an oxidizable metal counter-electrode and an electrolyte which in combination with the electrodes defines an electro-chemical cell whose output current depends on the amount of the gas passing into the cell through a diffusion membrane permeable to the gas being analyzed. In order to simulate the effect of rapid sample flow past the membrane and thereby maintain the analytical sensitivity of the instrument, the probe is vertically supported through a flexible coupling and includes an internal motor having an unbalanced rotor secured to its shaft. Rotation of the rotor causes the probe to nutate about its vertical axis to simulate the effect of a rapid sample flow.

REFERENCES:
patent: 3275541 (1966-09-01), Strong
patent: 3360451 (1967-12-01), Stack
patent: 3413199 (1968-11-01), Morrow
patent: 3445364 (1969-05-01), Strickler
patent: 3496084 (1970-02-01), Stack
patent: 3948746 (1976-04-01), Poole
patent: 4176032 (1979-11-01), Stevenson

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