A gas sensor detects the presence of
different gases in its proximity, and is used as a part of safety system to
warn and sound alarm about gases that can have harmful and hazardous effects on
humans, animals and environment. The gas detectors are used to detect
combustible, toxic, potentially hazardous gases along with oxygen, CO2 and many
techniques developed for multigas detection are basically categorized into two
- Non-interactive gas analysis
- Interactive gas analysis.
non-interactive technique is further sub-categorized into two types; non-dispersive infrared (NDIR) and
dispersive infrared (DIR) technique.
NDIR technique offer a number of advantages which include fast detection
response, gas detection specificity, long term measurement stability, reduced
maintenance cost and good sensitivity.
NDIR are widely used in
- Wood gasification
- Chemical industries
- Food & beverage industry
- Metal and steel production
- Oil rigs
- Mineral and coal mines
- Indoor complex and residential area.
Some of the major
manufacturers of non-dispersive multigas sensors:
- Dexter research centre
- FLIR systems
- General Monitors
- Crowcon Detection Instruments
- Oldham gas and many others
(Germany) recently introduced in the market an in-house developed NDIR sensor ”InfraFRED” and it can detect CH4, CO2, CO, NH3 and many other gases.
feature for NDIR sensors that has been overlooked
is the intrinsic safety of operating NDIR gas sensors in an explosive environment. The infrared light source in an NDIR
gas sensor could ignite a flammable gas inside the sensor. If the ignition escapes
from the NDIR sensor, a wider explosion could occur. With technology
improvement providing an intrinsically safe, portable NDIR sensor, it may open
new application areas, such as underground tunnels and sewers, chemical plants
and oil refineries.
Sensors Market Analysis: By Range
(SWIR, MWIR, LWIR, FWIR); Types (PIR, Thermopile, Pyroelectric, Photo
Reflector); Application (Automotive, Healthcare, Semiconductors,
Telecommunications, Manufacturing) - Forecast (2015-2020) http://industryarc.com/Report/119/infrared-sensors-market-report.html
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