What the workers didnt realize is that the process area that they walked through had a large amount of hydrogen (H2) that caused the carbon monoxide sensor to respond. That is, some tubes are sensitive to more than one gas. The detector has two-step gas alarm contact and fault alarm contact. By adding an extra-long spacing gamma detector which is very sensitive to gas to the conventional near-far detector system, the near-to-long inelastic and capture gamma count ratio are measured (Trcka et al., 2006; Inanc et al., 2009). Reference and makeup gas must be the same as the carrier gas, and the gas type must be specified in both the inlet and detector control tables. 9712 0 obj The problem with tubes is that they can be expensive and some have a short shelf life. Did you find a bug, erroror a feature you like?Let us know! Twin detectors are usually used . With its wide range of capabilities, the ProFLOW 6000 flowmeter simplifies gas flow . By Model window.onload = function(){ jQuery('.order-button').attr('onclick',"ga('send','event','button','click','add to cart')"); }. Is this an exact science? the sensor listed across the top of the chart when exposed to a known concentration of the target gas listed in the left hand column. Found inside Page 594Table IV . Results of Cross - Sensitivity Testing of CPA Sensors that has a much improved cross - sensitivity to hydro-. GAS The HCN sensor exhibits no significant cross - sensitivity when exposed to the other targeted gases . Policies. Solution: Clean, repair or change the flow controller. Communication to the central control system is done via a 4 to 20 mA signal. The detector must be held at an elevated temperature, always with a steady flow of carrier gas, and must be regularly baked out to ensure cleanliness. The pulse repetition rate of the same radar as that shown in Figure 9, but measured with a broadband detector configured as in MSA XCell Electrochemical Sensor Cross-sensitivity Tables * HI 50 ppm CO applied on CO XCell sensor => 50 ppm CO x 100% = 50 ppm CO displayed. Gas or Vapor TLV: TWA (STEL/C) Sensidyne Part No. For indoor air quality application, the SGP is optimized for the detection of VOCs and H2. The sensor has a Teflon membrane that allows gas to enter and helps prevent dirt, water, and other contaminants from entering. But this method can be used in conjunction with another gas detection method that we talked about earlier. Your source for all of your BW Technologies Gas Monitor needs. adequate for certain tasks) 1. The sensitivity to different gases can be modified by material engineering, e.g. 291 K. RX-515, RX-516, RX-517. Found inside Page 206Since cross-sensitivity of the H2S-sensor to SO2 is about 0.1 %, which corresponds to an SO2/H2S ratio of 1,000, this large value indicates that H2S content in this gas was below the detection limit. Lake and fumarolic gases show iNet Exchange Subject Index vi 70-8911 Subject Index Symbole 1-channel Signal Processors 123 2-channel and Keypad Signal Processors 122 3-channel Signal Processors 121 Find gas leaks fast! Poor thermal control of the . ASC Parts Warranty Request, Detector Rental
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