Nutating probe for gas analysis
US4441979A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1983 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | May 31, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4045
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.