Turbidity sensor
US5828458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1995 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Jan 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/532
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid turbidity or filter clog sensor comprises a light source and a detector having at least one sensor position to cross a flow path or a filter element in order to improve the correspondence of the light intensity received at the receiver in correspondence with the turbidity level or clogging level occurring in the test cell. The detector preferably includes a direct path sensor, a scattered path sensor positioned to cross the flow path from the transmitter, and the reference light sensor communicating with the source outside of the test chamber. Moreover, the direct path may be a straight line path or a reflected path through the flow path when a fluid having a low level of turbidity is passed through the test cell. Likewise, the sensor includes means for compensating for changes in the illuminating source, changes for temperature variations occurring at the test cell, and compact packaging for convenient installation and improved production capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.