enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Gas detector - Wikipedia

   en.wikipedia.org/wiki/Gas_detector

   A typical calibration schedule for a portable gas detector is a daily "bump test" accompanied by a monthly calibration. [17] Almost every portable gas detector requires a specific calibration gas In the US, the Occupational Safety and Health Administration (OSHA) may set minimum standards for periodic recalibration. [citation needed]

3. Explosimeter - Wikipedia

   en.wikipedia.org/wiki/Explosimeter

   Oldham EX2000 portable explosimeter. An explosimeter is a gas detector which is used to measure the amount of combustible gases present in a sample. When a percentage of the lower explosive limit (LEL) of an atmosphere is exceeded, an alarm signal on the instrument is activated.

4. Photoionization detector - Wikipedia

   en.wikipedia.org/wiki/Photoionization_detector

   The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes. PIDs produce instantaneous readings, operate continuously, and are commonly used as detectors for gas chromatography or as hand-held portable instruments. Hand-held, battery-operated versions are widely used in military, industrial, and ...

5. Hydrogen sensor - Wikipedia

   en.wikipedia.org/wiki/Hydrogen_sensor

   A hydrogen sensor is a gas detector that detects the presence of hydrogen. They contain micro-fabricated point-contact hydrogen sensors and are used to locate hydrogen leaks. They are considered low-cost, compact, durable, and easy to maintain as compared to conventional gas detecting instruments. [1]

6. Infrared open-path detector - Wikipedia

   en.wikipedia.org/wiki/Infrared_open-path_detector

   For portable use, detectors have also been made which use the natural albedo of surrounding objects in place of the retroreflector. The presence of a chosen gas (or class of gases) is detected from its absorption of a suitable infrared wavelength in the beam. Rain, fog etc. in the measurement path can also reduce the strength of the received ...

7. Explosive vapor detector - Wikipedia

   en.wikipedia.org/wiki/Explosive_vapor_detector

   EVDs can be classified into two types: portable EVDs, and pre-concentrated sample EVDs. Portable units have detection limits in the ranges of parts per million or parts per billion, similar to those of ETDs or explosive detection dogs. Pre-concentrated sample EVDs have sensitivities in the range of parts per quadrillion (10 −15).