Gas Analysis

From detecting trace levels in the atmosphere to multi-gas analyzers in the operating room and outer space, Dexter gas sensors will not let you down.

Our infrared gas detectors provide superior sensitivity and reliability that may be translated into a more effective early warning system when monitoring atmospheres for gases at trace levels.  Our technology also offers the opportunity to perform sophisticated gas analysis.  One example: To assure personal safety during a medical procedure, our gas detectors deliver a precise monitoring of the ratio of exhaled gases of a hospital patient who is under general anesthesiology.  Another example, no canary need die in a mine if Dexter gas detectors are installed on the job.  Infrared lead detectors, whether mobile or mounted, can be a critical element in your health and safety strategy at home and on the job, whatever life forms it is your responsibility to protect.

Does the job require that your safety or site monitoring equipment be mobile with a potential for high failure reports from routine wear and tear?  Intensive MIL-STD-883H testing performed by Trialon Corporation, an independent testing facility, confirm that Dexter Research's silicon-based temperature sensor detectors meet the same rugged requirements of 1,000G's for mechanical shock and 30G's in random vibration for which our thin-film detectors are famous.  Download Dexter's report here (PDF).

Click on any column heading in the table below to re-sort the listing of products in this application category by the specific characteristic of the Dexter detectors.

Thermopile Model# of ChannelsThermopile TechnologyPackage SizeActive Area Size (mm)Output Voltage (μV)Signal to Noise RatioResistance (kΩ)Time Constant (ms)
S60M TO-18 1 Silicon TO-18 .6 x .6 89 2,320 90 18
S60M-TO-5 1 Silicon TO-5 .6 x .6 120 3,125 90 27
ST60 TO-5 1 Silicon TO-5 .61 x .61 110 3,513 60 18
ST60 LCC 1 Silicon LCC .61 x .61 62 1,981 60 18
DR34 Compensated 1 Thin Film TO-5 3.16 x .4 115 7,099 16 38
ST120 1 Silicon TO-5 1.2 x 1.2 190 4,953 90 25
ST150 1 Silicon TO-5 1.5 x 1.5 295 8,159 80 37
DR46 Compensated 1 Thin Film TO-8 4 x .6 210 11,602 20 40
2M 1 Thin Film TO-5 2 x 2 250 19,531 10 85
ST60 Dual 2 Silicon TO-5 .61 x .61 62 1,981 60 18
DR34 2 Thin Film TO-5 3.16 x .4 115 10,088 8 38
ST120 Dual 2 Silicon TO-5 1.2 x 1.2 165 4,301 90 25
ST150 Dual 2 Silicon TO-5 1.5 x 1.5 230 5,990 90 38
DR46 2 Thin Film TO-8 4 x .6 210 16,406 10 40
TM34 3 Thin Film TO-8 3.16 x .4 115 10,088 8 38
T34 Compensated 3 Thin Film TO-8 3.16 x .4 115 7,099 16 38
ST60 Quad 4 Silicon TO-5 .61 x .61 62 1,981 60 18
ST120 Quad 4 Silicon TO-5 1.2 x 1.2 140 3,649 90 25
ST150 Quad 4 Silicon TO-8 1.5 x 1.5 230 5,990 90 38
2M Quad 4 Thin Film TO-8 2 x 2 250 19,531 10 85
10 Channel 10 Thin Film TO-8 3.16 x .4 115 10,088 8 38
SLA32 2 x 16 Silicon 0.97" x 1.27" DIP .05 x .65 14.8 423 76 7

World's Best Gas Detectors

Oxygen. It’s life itself. No wonder Dexter Research’s thermopile infrared gas sensors are used in home, office and health safety systems to detect dangerous gases that impact oxygen levels and other gas leaks. Our infrared gas detectors have also served as multi-gas analyzers in hospital operating rooms around the world to assure patient safety during anesthesiology.

Dexter Research is an infrared R&D center surrounded by a volume manufacturing operation. Because our infrared gas and temperature detectors are rugged and long lasting, because they are passive and require no external power source or battery to remain active and because they can be ordered to MIL-Spec, they have been a detector of choice for NASA and the US space program and our armed services. And because our customer service in gas detector technology is second to none, we are proud of our long-term customer relationships.

Dexter infrared gas leak detectors compete with semiconductors, oxidation and catalytic technologies. Gases of interest, including carbon monoxide, carbon dioxide, methane hydro carbons and refrigerants to name just a few, are often corrosive and reactive. With most sensor types, the sensor itself is directly exposed to the gas, often causing the sensor to drift or die too soon after installation. A Dexter infrared gas detector is remote and sealed against corrosion, contributing to its long life and reliable, stable performance. Our IR gas detectors are used in handheld monitors for infrared sensor gas detector designs, based on non-dispersive infrared sensor technology (NDIR), and as an infrared open-path gas detector.

Dexter gas detectors are available as thin-film and silicon based thermopiles. Our gas detectors are built to MIL-spec, as required, and are similar in construction to those used in combat ground vehicles and aircraft to detect fire, triggering rapid automatic extinguishing protocols than can successfully outrace a pending explosion or fire. In other applications, Dexter gas detectors continuously monitor for combustible, flammable and toxic gasses and oxygen depletion without requiring an external power source or battery to remain active. Our product is used widely in health safety systems and industrial process control and can be used on oil rigs to identify toxic gas levels.

Gas detectors may be designed as fixed gas detectors or as portable gas detectors. Gas detectors from competing technologies and other infrared manufacturers have potential for high failure reports from use. Intensive MIL-STD-883H testing performed by Trialon Corporation, an independent testing facility, confirm that Dexter Research's silicon-based temperature sensor detectors meet the same rugged requirements of 1,000G for mechanical shock and 30G in random vibration for which our thin-film detectors are famous.

A Dexter IR gas detector is essentially an infrared sensor that is sensitive to changes in temperature as small as 0.1 degree C. This makes our infrared sensors very valuable in gas detection. Our gas detectors will operate between -40°C to 85°C without being affected by ambient temperature fluctuations.

Use of a gas analyzer is essential in any operations where there are many gases that can be harmful to humans, animals, plant life or microorganisms. A Dexter gas detector, sometimes called a gas analyzer, continuously monitors the presence of target gas or gases within a defined area of interest, many times as part of a safety system. A Dexter gas sensor is integrated within a control system designed for automatic shutdown in the event of a leak or presence of an unwelcome gas by-product. The control system can also be programmed to simultaneously sound a gas alarm and send a text message or email alert to remote operators.

A product that includes a Dexter gas detector can also sound an alarm if one or more required gases are suddenly absent or fall below required levels. This sensing capability, combined with rugged design and years of reliable operation, is what drives worldwide use of Dexter’s gas detectors in hospital operating rooms during anesthesiology. Our IR gas sensing technology monitors critical levels of multiple gases as a patient exhales to confirm his or her respiratory safety during a hospital operation.

Infrared (IR) gas detection is a proven and well-developed sensing technology. Early infrared gas analyzers from some competitors were overly complicated, cumbersome, and expensive. However, Dexter IR gas detectors are quiet and do not have electronic noise issues. Our infrared detectors integrate well with microchip components, demonstrating a new and exciting potential for infrared gas sensing and analysis. Dexter gas analyzers have enjoyed an increase in demand in the commercial sector, as well as medical and military applications, and these demands will be met through our collaborative and highly productive relationships with our customers.

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