How to Select an Appropriate Flammable Gas Detector?
A combustible gas detector is also called a gas alarm. If it is used in an open place, such as a closed task workshop, as a safety alarm, a portable distributed combustible gas detector can be used because it can continuously, real-time, and accurately display the concentration of toxic and harmless gases on site. This new type of instrument also comes with a vibration alarm attachment - to prevent the sound alarm from not being heard in noisy environments, and is equipped with a computer chip to record peak values, STEL (15 minute short-term exposure level), and TWA (eight hour statistical weight value uniformity) - providing detailed guidance for worker health and safety.
If entering a confined space, such as reaction tanks, storage tanks or containers, sewers or other underground pipelines, underground equipment, agricultural enclosed grain warehouses, railway tankers, shipping cargo holds, tunnels, etc., testing must be stopped before personnel enter, and testing must be stopped outside the confined space. At this point, it is necessary to choose a multi combustible gas detector with a built-in sampling pump. Because there are significant differences in gas dispersion and gas species in different parts (upper, middle, and lower) of a confined space. For example, in the ordinary sense, combustible gases are relatively light in weight and are mostly dispersed in the upper part of enclosed spaces; Carbon dioxide and air have similar relative weights and are generally distributed in the middle of enclosed spaces; Heavier gases such as hydrogen sulfide exist in the lower part of enclosed spaces. Meanwhile, oxygen concentration is also one of the types that must be tested.
In addition, if considering the possible volatilization and leakage of inorganic substances inside the tank, a combustible gas detector capable of detecting inorganic gases is also required. Therefore, one intact combustible gas detector in a confined space should be equipped with a built-in pump suction function to detect non combustible gases in different locations; Capable of multi gas detection - to detect risk gases dispersed in different spaces, including inorganic gases and inorganic gases; Capable of oxygen detection - avoiding hypoxia or oxygen enrichment; A portable instrument with a compact size that does not affect workers' tasks. Only in this way can the relative safety of the personnel entering the confined space be ensured. In addition, after entering a confined space, the gas content inside should be continuously monitored to prevent concentration changes of volatile inorganic compounds or other toxic and harmless gases caused by personnel entry, sudden leaks, temperature changes, etc. If used for emergency accidents, leak detection, and inspection, instruments with pump suction, short response time, high sensitivity, and resolution should be used, which can easily identify the direction of leakage points.
Having a toxic and flammable gas detector is very useful when stopping industrial hygiene testing and health investigations, as it has functions such as data recording, statistical calculation, and computer connection.
Now, with the change in manufacturing capabilities, portable combustible gas detectors or composite combustible gas detectors or multiple combustible gas detectors are also our new choices. Due to the ability to equip multiple gas (inorganic/inorganic) detection sensors on one host, this detector has the characteristics of small size, light weight, fast response, and simultaneous display of multiple gas concentrations. More importantly, the price of the pump suction composite combustible gas detector is relatively cheaper compared to multiple single dispersed combustible gas detectors, and it is also more convenient to use. It should be noted that when choosing this type of detector, one can choose an instrument that has the function of independently switching on and off each sensor to avoid damaging one sensor and hitting other sensors for use. At the same time, in order to prevent the occurrence of suction pump blockage caused by water ingress, it is also safer to choose instruments designed with intelligent pump stop alarms.
