Permeable membrane soil probe
US5639956A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Nov 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/2294
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A permeable membrane sensor probe has a housing with a gas permeable membrane. The membrane has an outer surface and an inner surface. The membrane outer surface is disposed adjacent an outer soil engaging surface of the housing. The membrane is adapted to allow the gas phase of at least one particular chemical compound found in the soil to permeate through the membrane from the membrane outer surface to the membrane inner surface while substantially preventing the transfer of liquids and solids found in the soil through the membrane. A gas detecting arrangement is disposed adjacent the membrane inner surface and inside of the housing. This detection system detects the presence of a particular compound at different soil levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.