How To Choose Gas Sensor

- Jun 13, 2018 -

According to the measurement object and measuring environment

Determine the type of sensor based on the measurement object and measurement environment. To carry out a specific measurement, first consider the principle of the sensor, which requires analysis of various factors before the determination. Because, even if you measure the same amount of physics, there are also a variety of principles of the sensor to choose from, which principle of the sensor more appropriate, you need to be measured according to the characteristics and conditions of the sensor to consider the following specific problems: the size of the measurement of the location of the sensor volume requirements, the measurement of the contact or non-contact type Signal extraction method, wire or non-contact measurement, the source of the sensor, domestic or imported, price can withstand, or self-developed.

After considering the above problems, we can determine what type of sensors to choose, and then consider the specific performance indicators of the sensor.

The choice of sensitivity Usually, within the linear range of the sensor, the higher the sensitivity of the sensor is, the better. Because only when the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is advantageous to signal processing. However, it should be noted that the sensitivity of the sensor is high, and the external noise is also easily mixed with the measurement, and will be amplified by the amplification system, affecting the measurement accuracy. Therefore, it is required that the sensor itself should have a higher signal-to-noise ratio and minimize the disturbance signal introduced from the outside world. The sensitivity of the sensor is directional. When the measurement is a one-way volume, and its directional requirements are higher, you should choose other sensors with small sensitivity, if the measurement is a multi-dimensional vector, the sensor's cross sensitivity is required to be as small as possible.


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