一种新的手持设备可以在100英尺外探测爆炸性甲烷气体的存在。对于消防员来说，该工具提供了态势感知，节省了时间，并确保了距离上的安全。知道甲烷气体的存在使消防人员能够处理紧急气体泄漏，避免致命的爆炸。Teledyne气体和火焰探测公司的气体激光可以通过窗户、门上的缝隙或其他常见的排气点发射激光束，以提供100英尺外区域的甲烷含量的即时读数。激光是不可见的，但在用户“瞄准并射击”时，有一个绿色的指针引导目标。激光反射任何反射物体，然后分析沿激光路径每米距离的甲烷气体百万分之一(ppm)。它的测量下限为1.25 ppm/米。除了存储在设备上的气体读数外，手持设备还可以捕获视频图像和GPS位置。它可以通过WiFi和/或蓝牙连接到智能手机或其他设备，并有车载数据记录。设备被自动校准和测试时，它被送回其外壳。 Detects minute quantities of methane Gas laser detects a much smaller amount of methane than would be explosive, thus preventing explosions “It’s a brand new device, and everybody wants it,” says Alan Skinner, Regional Manager, Portable Gas Detection for Teledyne Gas and Flame Detection. “Once they understand what it does, they want it. Now you don’t have to be inside a hazard to detect the hazard.” The Gas Laser detects a much smaller amount of methane than would be explosive, thus preventing explosions by addressing leaks early. The lower explosive limit (LEL) for methane is 5 percent, the equivalent of 50,000 ppm, much higher than the measurement threshold of the Gas Laser. Previously, there was no entirely safe method of evaluating the gas concentration without being near an area, typically using a three-foot probe sensor, for example. “Now they know what they are getting into before they enter,” says Skinner. “It saves a huge amount of time.” Understanding working of gas laser Getting the word out about the device has been a challenge given the continuing coronavirus pandemic and disruptions of the hurricane season. “It’s one of those products you have to show them and let them play with it to understand what it does,” says Skinner. Interest was high at the recent FDIC show, where Teledyne unveiled the new sensor alongside its broader range of gas detection sensors. Teledyne’s range of portable sensors traces its roots back to GM Instruments (GMI), founded in Scotland in 1947. The sensor company was involved in multiple mergers and acquisitions in recent years, including ownership by companies such as Battery Ventures, Tyco, Scott Instruments, Johnson Controls, and 3M. Two years ago, the product line was acquired by Teledyne and represents the portables segment of their Environmental Monitoring Division, which also includes Detcon, Simtronics, and Oldham. Protege ZM and PS200 sensor PS200 sensor measures levels of four gases – methane, oxygen, carbon monoxide, and hydrogen sulfide Another sensor among Teledyne’s range of handheld devices is the Protégé ZM, a carbon monoxide sensor that a fireman can clip to their helmet, pocket, or bag. The “disposable” device has a 24-month lifespan, requires zero maintenance, and provides a calibration and bump test. The PS200 sensor measures levels of four gases – methane, oxygen, carbon monoxide, and hydrogen sulfide. An internal pump extracts a sample before a firefighter enters a confined space. A charge, bump, and calibration station (ABC Station) ensures calibration on a weekly, monthly, or twice-yearly basis. PS500 and GT Fire sensor The PS500 model adds another sensor to the four – typically either a photoionization detector (PID) for volatile organic compounds such as benzene, or a hydrogen cyanide (HCN) sensor to measure the presence of carcinogenic compounds that can be a byproduct of burning vinyl or plastics. The PID sensor can help investigators detect propellants that might indicate arson. The GT Fire sensor detects explosive gases in the PPM/LEL ranges with optional CO, H2S, and O2 sensors. The device can sniff out small gas leaks before any LEL level is reached. Able to find leaks in the PPM range, the device can pinpoint exactly where gas is leaking.