What to consider when selecting a gas detector
When choosing a gas detector, we need to consider both our own conditions and the following situations.
1. Stability
Stability is the primary issue that we must consider. What are the values of zero offset and full amplitude offset? The smaller the value, the better.
2. Convenience
We are all doing homework outside now. On the premise of stability, convenience is also a factor that must be taken seriously. It is lightweight, small in size, easy and comfortable to wear, and easy to maintain.
3. Applicability
Technicians identify and evaluate the hazardous gases on the site of limited space operations to determine whether the sensors of the selected detector meet the usage requirements.
4. Reliability
The longer the lifespan of the sensor, the better. Generally speaking, the lifespan of the sensor is at least 2 years, while for combustible gas sensors, it is 2-5 years. The longer the average error time, the better. What is the accuracy and precision? The smaller the error value, the better.
5. Protection requirements
Is the explosion-proof safety level applicable to the workplace, is the product safety certified, and is there an explosion-proof certification or measurement certificate.
6. Legibility
Whether the display area is large enough, whether the font is clear, whether the alarm sound is loud enough, and whether the alarm flashing light can be recognized from various angles.
What problems will be encountered when using gas detectors
The difference between natural diffusion type and pump suction type
Gas detectors are known to have two common detection methods, one is natural diffusion type and the other is pump suction type. However, it is unknown what the difference between these two methods is. Natural diffusion type slowly senses gas without applying any external force, while pump suction type uses self suction pump to independently suck gas. For example, the human nose reacts faster, so when choosing, it is important to focus on which detection method can effectively detect gas.
What is using oxygen to reverse measure nitrogen gas?
Oxygen and nitrogen are relatively common gases, and the main components in the air are 30% oxygen and 70% nitrogen. Due to the high price of nitrogen specific sensors, some people may choose to use oxygen sensors to reverse measure nitrogen. In fact, it is possible to subtract the oxygen content value from 100 to obtain the oxygen content value.
