Which portable gas detectors are available?
The detecting technique of portable gas detectors primarily distinguishes two types: pump suction type and diffusion type. The so-called portable is intended to be portable, transportable, and flexible in use, as the name implies. When making a decision, we must take into account which portable equipment is best for his application area.
The following features should be present in a portable gas detector:
1. The current gas concentration can be promptly displayed on a direct-reading digital screen.
2. Record storage allows you to choose the sample interval and automatically record current concentration data in response to demand.
3. If the gas level exceeds the standard, it vibrates, flashes, and makes a sound.
4. Comes with a battery that can ensure a power reserve for more than a few hours of nonstop operation, either a rechargeable lithium battery or a replaceable battery.
5. The equipment's weight and volume. We must take into account the proper volume and weight based on our own usage and application features because portable gas detectors come in a variety of weights and volumes.
The concepts of operation for portable gas detectors are pump suction sampling and diffusion sampling. The key differences between these two categories are listed below.
1. The equipment can be made smaller and use less energy with the diffusion type. When a gas diffuses and meets a sensor, the gas concentration is detected, which works similarly to how the human body detects smells.
2. Pump-suction type. Because the air pump is used to extract air and sample, the power consumption, volume, and weight must be slightly larger and heavier. However, the air pump may be used to locate the necessary detection point quickly and precisely. It is better suited to and requires pumping sampling detection circumstances, such as detecting the amount of gas in a pipeline or the amount of gas in a sealed room. These are the gas detectors that need to be pumped in order to operate and detect more conveniently.
