Infrared radiation detector units and methods of assembling transducers in which said units are incorporated
US5793044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1995 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Nov 9, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/61
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transducer for nondispersive infrared radiation (NDIR) gas analysis and a passive device for verifying the calibration of the transducer. The calibration verification device can be mounted on a cable by which the transducer is attached to an associated signal processing-control-display unit (SPCDU) or monitor. Calibration parameters for the transducer are stored in a plug at the monitor end of the cable. The transducer includes an integrated subassembly of an infrared radiation source unit, an infrared radiation detector unit, and a flex connector and may be employed with an airway adapter preferably maintained by a thick film heating element at an above-dewpoint temperature to ascertain the concentration of a specie potentially present in gases flowing through the adapter. The transducer may also be employed for other purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.