Failure analysis of ifm gas sensors

Create Date: 2024-8-30 12:03:23|Source: IFM/ifm

1. How long does it take for the gas sensor to be recalibrated after use: The length of the time distance between the initial calibration and recalibration depends on many factors, generally including the operating temperature, humidity, pressure, what kind of gas the sensor is exposed to, and the length of time it is exposed to the gas.

However, most products can provide a very stable signal over a long period of time, and the use of gas sensors only requires regular calibration, such as once a year. If the requirements for sensor use are extremely high or for safe use, calibration work may be more frequent.

Failure analysis of ifm gas sensors

2. What happens when the temperature of the gas itself is different from the temperature of the sensor: the temperature of the sensor itself determines its minimum display current, and the temperature of the measured gas sample has a certain impact on this. The rate at which gas molecules pass through the pores and enter the sensing electrode determines the signal of the sensor.

If the temperature of the diffused gas passing through the pores is different from the temperature of the gas inside the sensor, the sensitivity of the sensor may be affected. Before the device is set up, there may be a slight drift or a transient change in current.

3. Whether the gas sensor can be continuously exposed to the policy gas: The gas sensor can intermittently monitor the guide gas, which is generally not suitable for continuous monitoring, especially when it involves high gas concentration, high humidity or high temperature.

In order to achieve the intention of continuous monitoring, it is sometimes possible to cycle two (or even three) sensors, so that each sensor is exposed to the gas for at most half of the time, and the other half of the time is restored in the fresh air.

The gas sensor will be developed on the basis of making full use of multidisciplinary induction skills such as micromechanical and microelectronic skills, computer skills, signal processing skills, sensing skills, fault diagnosis skills, and intelligent skills. The development of fully automated digital intelligent gas sensors that can monitor multiple gases together will be an important research direction in this field.

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