Gas Detection 53
Beam Splitter Detectors for Gas Analysis
As a part of gas detection instruments, infrared detectors are dedicated to the wellbeing of humans and environment. Multi channel detectors with beam splitters by InfraTec allow for very precise gas analysis, particular in gas detection technology. This ability makes them a perfect fi t for measurement or testing tasks in safety technology. Actually, their measuring performance characteristics experienced crucial improvements over recent years. That’s why they can be found utilised not only in stationary and mobile analysing instruments in industrial environments with adverse ambient conditions but also in the fi eld of process instrumentation supporting quality assurance and in hospitals in measuring instruments for anesthesia monitoring.
Unlike conventional multi channel detectors, beam splitter detectors only have one single aperture opening. Thus, major parts of the incoming radiation impinge vertical to the pyroelectric crystal, which allows for very accurate measurement. Hence, a gas cell with an effective diameter of just 2.5mm is suffi cient. Apart from an accelerated exchange of gas, this results in very low dead volumes of the measuring system. Measurement devices equipped with the detector can be correspondingly smaller. The permanently stable signal ratio between the individual channels ensures a high degree of measurement accuracy. This is because mechanical expansions in the optical system of the measurement device, ageing effects or any possible contamination in these detectors are already accounted for before the beam is split and thus affect all channels equally.
The split of incoming radiation beams into various parts takes place inside the detector. The beam splitters used by InfraTec in multi channel detectors are solely refl ection beam splitters. That means they refl ect the incoming radiation in various directions respectively. These optical components consist of highly refl ective gold plated microstructures. The radiation entering through the aperture opening of the detector is split into several radiation beams of equal intensity but in different, predefi ned directions within the detector based on the architecture of the innovative microstructure inside. Each of the beams impinges on a corresponding pyroelectric sensor element with an upstream optical fi lter. The microstructures vary according to the detector type. In four channel detectors these resemble four- sided micro-pyramids, whereas in dual channel detectors these are V-shaped grooves.
Combining stable measurement characteristics with long-lasting design, beam splitter detectors are suitable for integration into portable gas detection instruments as well as fi xed installed gas detection systems. They enable for continuous 24/7 operation.
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E4000 Portable 4-GAS Detector
Newly Designed High-Quality Portable Multi-Gas Detector for the Detection of up to 4 Gases Simultaneously
Features: • Smart Interchangeable Sensor Module
• Selectable MOS, Catalytic, Infrared, Electrochemical & PID Sensors
• Optional Built-in Pump
www.hwsensor.com sales@hwsensor.com +86-371-67169080
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Henin Advert E4000
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ISO14001 ISO9001
OHSAS18001
7174ad@reply-direct.com Available from:
Euro-Gas Management Services Ltd, Churston House, Bascombe Road, Churston Ferrers, Devon, TQ5 0JJ, United Kingdom.
TEL: +44 (0)1803 844414 FAX: +44 (0)1803 844224 EMAIL:
sales@euro-gasman.com WEB:
www.euro-gasman.com
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24/01/2017 16:01
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www.envirotech-online.com IET March / April 2017
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Solutions for Gas Detection using TDLS
Axetris AG is a designer and OEM manufacturer of Laser Gas Detection (LGD) solutions based on Tunable Diode Laser Spectrometry (TDLS). The TDLS technology provides a solution to many gas detection challenges in emission monitoring and process control. The technology offers unique advantages like precise optical, contact-less measurements, excellent target gas selectivity and sub ppm-level detectivity.
Laser Gas Detection solutions from Axetris cover a variety of applications in the fi eld of continuous emission monitoring, process control, leak detection or selective catalytic reduction. This year, at AQE 2017, Axetris are particularly proud to announce their new LGD F200 module able to measure HCl in a low range according to compliance requirements of European directives QAL1. Learn more at Stand 8.
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GAS DETECTION STARTER KIT OFFER
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Detect more than 400 h and vapours simply and calibration effort or pow
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• Kitagawa AP-20 Sam with integral sample t precision sampling, tu fragment container;
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Detect over 400 hazardous gases and vapours simply and reliably, without calibration eff ort or power supply.
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www.euro-gasman.com
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• PLUS manual, carrying case and spares;
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• Certified to EN1231 • Certified to ISO9001:2008 • US Design patent no. US D467,334 S • Japan design reg no. 1131898
Manufactured by:
Komyo Rikagaku Kogyo K.K. 1-8-28 Shimonoge, Takatsu-Ku, Kawasaki-City, Kanagawa 213-0006, Japan
TEL: +81 (0)44 833 8911 FAX: +81 (0)44 833 2672 EMAIL:
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