Infrared filter - Import export

Gas Detection Systems use Interference Bandpass Filters to identify the emission of a type of gas. Different gases emit at a specific wavelength which makes it identifiable when using a relevant Interference Bandpass Filter. These wavelengths are: Carbon Monoxide (CO) @ 4.73μm Nitric Oxide (NO) @ 5.24μm Nitrogen Dioxide (NO₂) @ 6.17μm Sulphur Dioxide (SO₂) @ 7.42μm Hydrogen Chloride (HCl) @ 3.55μm Carbon Dioxide (CO₂) @ 10.7μm Knight Optical provide a wide range of interference bandpass filters that can be used with gas detection. The Interference Bandpass Filters would be need to transmit in the infrared region. These would be a customised item, which we are very experienced in. We provide narrow, standard, broadband and extra broadband filters with a high optical density of 4 as standard, however this can be customised for you. For more information read PDF

Offers excellent performance for multigas measurements in dry sampling, including HCl, HF, NO, NO2, N2O, SO2, CO, CH4, TOC, CO2 and O2. MultiGas NDIRGFC analyzer (NonDispersive Infrared Gas Filter Correlation) measuring up to ten gases simultaneously, including Nitrogen Oxide (NO), Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Carbon Monoxide (CO), even Hydrogen Chloride (HCl) and Hydrogen Fluoride (HF). • process optimization and environmental compliance • measurement of dry and corrosive samples • fast and simultaneous measurements of up to 10 gases • dry basis measurement • automatic cross interference correction

The MIR 9000 P measures simultaneously 8 gases – NOx, SO2, CO, CO2, CH4, N2O, O2 and residual H2O – and uses the nondispersive infrared method (NDIRGFC) with gas filter correlation. O2 is measured by a builtin SRM paramagnetic sensor. • operational at any time due to standby mode • remote access to full operation • quick installation • onsite preparation of report elements • time saving all along emission testing process

The TPS 534 thermopile sensor in TO 5 type housing employs a chip of 1.2 x 1.2 mm2 absorber size and a 30 kV thermistor as temperature reference. The round window opening is equipped with a 5.5 µm longpass (standard) infrared filter. The sensor shows a flat sensitivity characteristics over the wavelength.

The TPS 534 thermopile sensor in TO 5 type housing employs a chip of 1.2 x 1.2 mm2 absorber size and a 30 kV thermistor as temperature reference. The round window opening is equipped with a 5.5 µm longpass (standard) infrared filter. The sensor shows a flat sensitivity characteristics over the wavelength.

The high detectivity up to 4.0*10^8 cm√Hz/W as well as the high sensitivity up to 200000 V/W characterize the MPS2SENS flourane. The optical characteristics of the infrared filter windows perfectly suit the analysis of flouranes (CWL of 8620 ± 45 nm, HBW of 540 ± 45 nm, reference channel with CWL: 5060 ± 25, HBW: 100 ± 15 nm). The MPS2SENS sulfur dioxide provides reliable readings in environments between -20 and 85 °C for NDIR gas measurement in medical applications, e.g. anesthetic gas monitoring. The pyroelectric detector has 2 chips with a thin film CPM membrane in the core. (CPM: Ceramic Pyroelectrical Material). Other key product features for long-term use in demanding applications: wide spectral sensitivity 2 - 15 µm (optimized from 3 - 5 µm), high sensitivity with a modulation frequency of up to 100 Hz, low microphone effect due to the low membrane mass, very low temperature dependence, amplified signal in current mode.

The premium dual channel thermopile has been specifically designed for demanding measurement applications for the analysis of N2O (nitrous oxide) in environments from -20 to 85 °C. It achieves an exceptionally high detectivity of up to 6.27*10^8 cm√Hz/W and a sensitivity of up to 171 V/W. This signal quality is comparable to pyroelectric detectors. The infrared filter with a CWL of 4525 ± 20 nm and a HBW of 83 ± 6 nm is precisely matched to the optical characteristics of the target gas. Medical technology, especially patient and anesthetic gas monitoring, are typical application fields for the MTS2SENS200 nitrous oxide. The integrated thermistor for reference temperature determination and an additional reference channel (CWL: 3910 ± 28, HBW: 70 ± 10 nm) complete the detector. The dual detector MTS2SENS200 nitrous oxide is based in the core on 2 chips with 200 bismuth-antimony/antimony thermocouples each.

This 2 channel premium pyrodetector offers an optimal performance for the measurement of carbon compounds (CxHy) through the narrowband infrared filter with a CWL of 3400 ± 20 nm and a HBW of 140 ± 20 nm as well as an additional reference channel (CWL: 3910 ± 28, HBW: 70 ± 10 nm). The particularly high detectivity of up to 4.0*10^8 cm√Hz/W as well as the very high sensitivity of up to 200000 V/W guarantee precise and long-term stable measurement results. The pyroelectric detector allows demanding applications in gas measurement and gas analysis in various industries such as aerospace, medical or industrial process technology. Two detector chips with a ceramic pyroelectric thin film diaphragm form the core of this 2 channel pyroelectric detector. The low microphone effect due to the low membrane mass, the very low temperature dependence and an amplified signal in current modes enhance the measurement signals of the dual IR detector.

2 sensor chips, each with 200 bismuth-antimony/antimony thermopairs, form the basis of this thermopile detector. Incident IR radiation creates thermal diffusion currents of the two different metals (Seebeck effect). The signal strength of the highly sensitive IR sensor is comparable to that of a pyro detector: high detectivity up to 6.27*10^8 cm√Hz/W and high sensitivity up to 171 V/W (detector with the filling gas Krypton in the TO housing). The infrared filter windows are ideal in their optical characteristics for the analysis of flouranes with a CWL of 8620 ± 45 nm and a HBW of 540 ± 45 nm. The interference absorber, an integrated thermistor for reference temperature determination and the reference channel (CWL: 5060 ± 25, HBW: 100 ± 15 nm) are further important features for reliable measurements in demanding medical applications. The MTS2SENS200 flourane provides reliable measurements in environments between -20 and 85 °C, e.g. for anesthetic gas monitoring.

This premium pyroelectric quad detector is tailored for measurement applications for the analysis of nitrogen oxides (NOX) in environments from -20 to 85 °C. The filters determine the infrared detection of the following gases: water vapor (H2O) (CWL: 6580 ± 40, HBW: ± 35 nm), nitric oxide (NO) (CWL: 5300 ± 30, HBW: ± 20 nm), sulfur dioxide (SO2) (CWL: 7300 ± 50, HBW: 180 ± 20 nm) and an embedded reference channel (CWL: 5060 ± 25, HBW: 100 ± 15 nm). The four-channel IR pyrodetector achieves a high detectivity of up to 4.0*10^8 cm√Hz/W and sensitivity of up to 200000 V/W. The MPS4SENS NOX provides reliable measurement values in ambient temperatures between -20 and 85 °C, e.g. for industrial gas measurement or process analysis in various industry and manufacturing areas, such as chemical, textile, environmental technology, recycling or exhaust gas technology. Micro-Hybrid is the only manufacturer of pyroelectric 4-channel detectors with a high performance membrane in a TO39 package.