Gas detector is a gas leak detection instrument instrumentation, mainly by the fixed / portable gas detector two. The use of gas sensors to detect the presence of gas in the environment, gas sensors are used to detect the composition and content of gas sensors.
Fixed gas detection:
Specific gas leaks can be tested at specific inspection points.
Fixed detectors are generally two-body type, with the sensor and the transmission of the test head as a whole installed in the test site, a circuit, power and display alarm device consisting of secondary instrument as a whole installed in a safe place, easy to monitor.
【Detection principle】
In the process and technology more suitable for fixed testing required for continuous, long-term stability and so on.
They should be based on the type and concentration of gas in the field to be selected, but also pay attention to install them in the most likely to leak a specific gas location, such as the gas to be selected according to the proportion of the most effective sensor installed height and so on.
At present, this type of stationary gas detection uses more detectors in the production process and on industrial installations.
Portable gas detector:
Convenient operation of portable instruments, small size, easy to carry to different production sites, electrochemical detector alkaline battery powered, continuous use of 1000 hours.
The new LEL detector, PID and composite instruments use rechargeable batteries (currently some have no memory of sickle-horsetail or carp ion batteries) and can work continuously for 12 hours, so they are used as such instruments in various factories and in the health sector More extensive.
In summary, a complete confined space gas detector should have a built-in pumping function so that it can be non-contact, sub-site detection with multi-gas detection function to detect different spatial distribution of dangerous gases, including inorganic gases and organic Nong Nong A portable instrument with oxygen detection to prevent hypoxia or enrichment without affecting the worker's work. Only in this way can we guarantee the absolute safety of the staff who enter the confined space.