Typically, they have monitored H2S using the more stringent operating exposure limit (OEL) - i.e., a 10 ppm ceiling averaged over one minute. The past practice of many companies has been to use electronic H2S detectors and monitor for conditions that exceed older ACGIH guidelines. In most cases where exposure to H2S is possible, company procedures call for personnel to wear portable detection devices and take appropriate precautions if an action point concentration is detected. Less than 5 ppm: Metabolic changes observed in exercising individuals, but not clinically significantĥ ppm: Increase in anxiety symptoms (single exposure)ĥ ppm: Start of the dose-response curve (short-term exposure)Ġ.032-0.02 ppm: Olfactory threshold (begin to smell) Physiological responses to various airborne concentrations of H2SĪir Concentration: Physiological Responseġ,000-2,000 ppm: Loss of consciousness and possible deathġ00-1,000 ppm: Serious respiratory, central nervous, and cardiovascular system effectsġ50-200 ppm: Olfactory fatigue (sense of smell is significantly impaired)ġ00 ppm: Immediately Dangerous to Life and Health (IDLH concentration)ĥ-30 ppm: Moderate irritation of the eyesĥ-10 ppm: Relatively minor metabolic changes in exercising individuals during short-term exposures Table 1 lists bodily responses when breathing in various airborne concentrations of H2S. At concentrations above the IDLH level, a person's sense of smell is quickly deadened. Although most people can smell very low concentrations of H2S, it is dangerous to assume odor provides adequate warning. In 1995, NIOSH updated and published the IDLH (Immediately Dangerous to Life or Health) value of 100 ppm. There is little doubt about the health effects of breathing air contaminated with H2S. Are electrochemical sensors available that can accurately detect an H2S concentration at some ceiling limit value that makes sense in terms of the ACGIH-specified TWA and STEL, without a lot of false alarms? Still, there is the question of whether or not these new ACGIH limits are practical in terms of current monitoring and detection technology. The possibility of a worker's suffering serious injury from H 2S exposure and a subsequent lawsuit could have a serious economic impact on a company. This makes sense from both a health and legal perspective. The following table provides an overview of the Crowcon range of portable gas detectors – should you require specific advise or technical support to enable the safe and reliable monitoring of flammable, toxic or oxygen gas levels please do not hesitate to call us.Many companies may feel compelled to use the new limits in their industrial safety and hygiene procedures. Portable Gas Detectors Gas Detection Product Selector Crowcon Clip – Personal fixed life gas alarm (Obsolete).Crowcon Tetra – Personal 1-4 gas monitor (Obsolete).Crowcon I-Test – Fully automated solution for testing and verifying.Crowcon Triple Plus+ – Portable 1-4 gas monitor.Crowcon Laser Methane Mini – Long-range portable detector.Crowcon Detective Wireless – Multigas Temporary Area monitor.Crowcon Detective+ – Multigas Temporary Area monitor.Crowcon Clip SGD – Personal fixed life gas alarm.Crowcon Gasman – Personal single gas monitor.Crowcon Tetra 3 – Personal 1-4 gas monitor.Crowcon Gas-Pro TK – Dual range portable monitor.Crowcon Gas-Pro PID – Gas Monitor with Photo Ionization Detection technology.Crowcon Gas-Pro IR – Personal infa-red multigas monitor.Crowcon Gas-Pro – Premium multigas personal monitor.T&D Can Specify The Correct Crowcon Portable Gas DetectorĬrowcon gas detectors range have over 40 years industry experience and knowledge to back up the technology inside the range of gas monitors. ➡ Also see the range of Crowcon Fixed Gas Detectors The range of gas detectors from Crowcon are suitable for detecting single and multi gases and can be configured to suit specific requirements. This range of portable gas detectors are used to protect staff and personnel in many industries around the world and are specified to ensure that each product is fit for purpose.īy specifying and using the correct portable gas detector, workers are able to work for prolonged periods of time in potentially hazardous areas where the threat from harmful gases would otherwise make work impossible. The range of portable gas detectors and portable monitors for personal and temporary gas monitoring from Crowcon, consists of a wide range of single and multi gas products.Ĭrowcon portable gas detectors guard against a range of hazardous gases and vary in size and complexity depending on the requirements of the end user. Single & Multi-Gas Detectors for Flammable, Toxic & Oxygen Gases Gas Detection Products for Industrial, Hazardous Areas & Explosive Atmospheres Crowcon Portable Gas Detectors Portable Gas Detectors
0 Comments
Leave a Reply. |