The main differences between portable and fixed gas probes are as follows:

1. Installation and usage methodsPortable gas detectors can be carried around and are suitable for occasional testing, without the need for fixed installation on site; The fixed gas detector needs to be fixedly installed on site for 24-hour continuous monitoring, suitable for fixed detection points in industrial equipment and production processes.

2. Application scenariosPortable detectors are suitable for use in open workshops as safety alarms and can also be used for testing before entering enclosed spaces; Fixed detectors are more suitable for detecting specific gas leaks at specific detection points, such as reaction tanks, storage tanks or containers, sewers or other underground pipelines, underground facilities, agricultural closed grain warehouses, railway tankers, shipping cargo holds, tunnels and other work environments.

3. structural compositionFixed detectors are mostly two-piece, with a detection head composed of sensors and transmitters installed as a whole on the detection site, and a secondary instrument composed of circuits, power supplies, and display alarm devices installed as a whole in a safe place for easy monitoring by personnel; Portable detectors are compact in size, easy to operate, and can be carried to different production sites.

4. Detection principle and technologyThe detection principle of a fixed detector is similar to that of a portable one, but it is more suitable for the continuous, long-term stability and other characteristics required for fixed detection in terms of process and technology. Portable detectors are typically powered by alkaline or rechargeable batteries and can operate continuously for nearly 12 hours.

In summary, the choice of which type of gas probe to use depends on the specific application scenario and detection requirements.