In situ oxidation reduction potential measurement of soils and ground water
US5798940A · kind A · utility
Inventors
Key dates
| Filing date | Jul 5, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jul 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V9/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A ground penetrometer for determining pH and oxidation reduction potential (ORP) of soils. The penetrometer includes an ORP electrode, a pH electrode, reference electrodes, and a temperature sensor. A singular reference electrode device establishes two reference partial electrical circuits complementing the ORP and pH electrodes. The reference electrode device includes an electrolytic chamber isolated from soil being investigated by an ion permeable ceramic barrier. Electrolytic liquids are retained within their chamber. The temperature sensor and the electrical circuits generate voltage or current signals to transducers, which in turn generate data signals responsive to the electrical signals to a microprocessor. The penetrometer, a driver for forcing the penetrometer into the ground, and the microprocessor are carried on a motorized vehicle to and about a site being investigated. The data is stored within the microprocessor and is available for graphic reproduction and transferral to other data handling equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.