Differences Between Multi‑Gas Detectors and Toxic‑Gas Alarms
① Multi‑Gas Detector Multi‑gas detectors are applied for concentration measurement of various mixed gases in diverse industrial and special environments. Adopting imported electrochemical / infrared gas sensors and microcontroller technology, they deliver fast response, high measurement accuracy, good stability and repeatability with competitive overall performance domestically. It is an intrinsically‑safe device for continuous gas‑concentration monitoring. It is powered by a high‑capacity rechargeable Ni‑MH battery for ultra‑long standby time. SMD packaging ensures reliability and neat appearance. Digital backlit LCD provides clear and intuitive readings. Two‑level audible‑visual alarm gives timely, accurate and straightforward warning upon reaching preset alarm concentrations. The housing is made of high‑strength special ABS engineering plastic with stylish design for comfortable grip and high durability.
A multi‑gas detector can be fitted with multiple required gas‑detection sensors within one unit. Therefore, it features compact size, light weight, fast response and simultaneous multi‑gas concentration display. More importantly, multi‑gas detectors are more cost‑effective and easier to operate than several single diffusion‑type gas detectors. When selecting such devices, models with individual on/off control for each sensor are recommended to prevent one faulty sensor from affecting others. Multi‑gas detectors are capable of detecting numerous gases including methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, acrylic acid and more.
② Toxic‑Gas Alarm Toxic‑gas alarms measure toxic‑gas concentrations in atmosphere in ppm, while oxygen readings are given in %VOL. Equipped with highly‑reliable industrial‑grade electrochemical or infrared sensors, they feature high stability and maintenance‑free performance, reflecting advanced technical standards. Three programmable preset alarm points are available, each corresponding to one LED indicator.
A toxic‑gas alarm system consists of detectors and an alarm control main unit. It is widely deployed in petrochemical sectors such as petroleum, gas supply, chemical plants and oil depots where toxic‑gas hazards exist, to detect gas leaks in indoor and outdoor hazardous areas. It serves as critical equipment for production and personal safety. When toxic gas is present, the detector converts gas signals into voltage or current signals transmitted to the alarm controller, which displays the concentration reading. Audible‑visual alarms will trigger once the toxic‑gas concentration exceeds preset thresholds, prompting operators to take safety measures and prevent combustion‑explosion accidents.
Various toxic gases are generated in many industrial processes, which may cause poisoning without proper precautions. In particular, combustible toxic gases such as carbon monoxide may explode when mixed with air at certain concentrations upon exposure to ignition sources. The presence of toxic gases cannot be completely avoided, yet risks can be prevented. Timely detection of toxic‑gas presence and concentration together with proper countermeasures can minimize hazards and losses.
