22 Gas Detection IR-Sources for Gas Detection and Spectroscopy
Axetris’s Infrared (IR) source from Leister (Switzerland) is a preferred component for optical infrared analysers used in life saving medical instruments, automotive emission control devices and in demanding, safety-relevant applications in the oil & gas industry. Further applications include water analysis, breath alcohol testing and refrigerant monitoring. Integration into optical gas detection systems using Non- Dispersive Infrared Absorption (NDIR), photo acoustic (PAS) or attenuated total reflection (ATR) techniques allow the
monitoring of gases such as CO2, CO, CH4, C2H4, NH3, H2S, SF6, NOx, SOx, CS2, VOC’s, H2O, N2O and many others. The IR source is a MEMS Chip-based black body emitter with broadband emission (2 to 14µm), high mechanical stability, high emissivity, low power consumption and long lifetime (>10 years). The exceptional modulation speed of up to 100 Hz and high modulation depth is a result of the low thermal mass of the heated micromechanical membrane.
Axetris offers a wide range of packaging options such as protective caps or reflectors combined with either sapphire, CaF2, BaF2 or Germanium coated windows. Custom beam shaping solutions and support from Axetris’s optical- and application engineering team enables system solutions, which are superior in terms of signal-to-noise, power efficiency and lifetime of the device.
Reader Reply Card No. 72
Photoionisation Lamps Are the Heart of Gas Detection Systems
Heraeus Noblelight (Germany), one of the technology and market leaders in the field of specialty light sources, has published its latest application note on Photoionisation Detector Lamps (PID) lamps. PID lamps are at the heart of gas detection systems: why is a good PID lamp important and how to get the best out of it are explained in the latest application note. Lamp spectra, lifetime and the best practice for ensuring long term stability, plus why PID lamp quality is important are topics discussed. PID lamps are most commonly used in Hand-Held Gas Detectors for VOC detection, gas chromatography (GC), trace gas monitoring and sample ionisation for mass spectrometry.
“The purity of the spectrum is important for good lamp operation. The presence of secondary lines due to contaminants can affect the intensity of the primary lines, lamp intensity and lifetime”, explains Stephen Attwood, Sales Director of Heraeus Noblelight Analytics. However, contamination of the lamp can occur at higher wavelengths due in main to hydrocarbons. Whilst this does not interfere with the VUV lines in terms of detection of VOCs, the contamination absorbs some of the energy from those lines, resulting in decreased sensitivity and a shorter life time.
WD6200 Fixed Gas Monitor Fixed Gas Monitor
Feature
• High Sensitivity, stable performance, long life span • 4-20mA analog signal output
• Relay output of low alarm, high alarm and fault alert • LCD screen display
• Setting through remote controller, easy for the users • Specific module design, easy for maintenance and replacement • Fool-proofing plugging sensor module design, quick for replacement • Indication functions of re-calibration and sensor overdue
NO.169, Xuesong Road, National High-Tech Zone, Zhengzhou, 450001, China Tel: 86-371-67169080 / 70
Email:
sales@hwsensor.com Reader Reply Card No. 74
Henan Hanwei Electronics Co., Ltd. Fax: 86-371-67169090
New Colorimetric Instrument Offers Simple and Reliable Detection for a Wide Range of Gases
DOD Technologies Europe – represented by Solidsense GmbH (Germany) – has launched a new portable colorimetric detection device.
The Next Generation ChemLogic Portable (CLPX) provides powerful portable gas detection to meet a wide variety of applications. Its Improved Optics Design and Automated Optics Calibration makes the CLPX the most reliable, fool proof, user friendly gas detector on the market.
The CLPX is a versatile instrument that can be configured to detect a variety of gases, eliminating the need to purchase different instruments or different gas keys to sample different gases. Changing the instrument from detecting one gas to another requires a simple change of the cassette.
The CLPX uses DOD Technologies’ reliable ChemLogic tape technology to detect toxic gases and utilises the most advanced electronics and analysis software to meet the needs of health and safety professionals.
Reader Reply Card No. 75 Reader Reply Card No. 73
New Multi-Gas Detector Launched
Industrial Scientific (USA) recently introduced the Ventis MX4 – one of the most highly configurable instruments available today. Select a powerful, yet lightweight pump for easy monitoring in confined spaces, or use the instrument without the pump for continuous personal monitoring. Best of all, the Ventis is compatible with iNet®, Industrial Scientific’s unique Gas Detection as a Service solution.
Reader Reply Card No. IET May / June 2012
www.envirotech-online.com 76 Reader Reply Card No. 77
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