Fixed gas probes must be used in the following situations:

1. Places with a risk of combustible gas leakageIn industrial, commercial, and household environments, it is used to monitor the concentration of combustible gases in the air and issue an alarm when the concentration exceeds the standard to prevent accidents such as fires and explosions.

2. Gas alarm controller installed uniformly by relevant departmentsIn this case, only a few probes need to be installed to work properly. If the monitoring system outputs a 4-20mA signal, it can be directly paired with a probe; If it is an RS485 signal output, it depends on the situation.

3. Need to independently detect the concentration of natural gas leakageIf the detector is equipped with on-site display function and sound and light alarm lights, it can exist independently by installing only one sound and light alarm device, which is a remote control device.

4. Gas monitoring in special environmentsIn environments with high temperature, high humidity, and a lot of dust, it is necessary to choose detectors with corresponding protective functions and regularly clean and maintain them to ensure their normal operation and accuracy.

5. Installation location determined based on gas density and air flow conditionsFor example, natural gas is lighter than air, and the detector should be installed at a distance of about 30 centimeters from the ceiling; Liquefied petroleum gas is heavier than air, and the detector should be installed at a distance of about 30 centimeters from the ground.

In summary, fixed gas probes must be used in situations where there is a risk of combustible gas leakage, there is a unified installation alarm controller, independent detection is required, special environments, and installation locations are determined based on gas density and air flow conditions.