Explosimeters

Explosimeters

L 'explosimeter is a device that indicates the concentration of one or more gases (previously specified) in an environment; is used, primarily, for the purpose of detecting, and optionally locating, leakage of fuel gas. It is part of the broader category of gas detectors. Generally is designed as a detector or indicator, rather than as a measuring instrument, being usually employed to "test" areas not well demarcated, where the precision measurement makes sense if performed on a given sample of gas, with obvious reference to those gases, such as natural gas, which become explosive in certain concentrations. 

There are various types of explosimeter: under the appearance can be portable (shoulder or pocket), vehicle (mounted on a truck or trailer) or wall (with audible alarm and remote control on a solenoid valve) under the aspect of principle of operation can be flame ionization, catalytic, laser in the infrared region, semiconductor, photoionization, etc.. Then stand further regard to selectivity towards the various gases. The most common explosimeters are used as detectors of methane (especially if not yet odorised) or other potentially explosive or flammable gases, in order to prevent injuries in various environments with insufficient air exchange, or to locate leaks from pipelines. The tools may reveal other gases (eg.: Toxic, inert, refrigerants, organic) are generically called "gas detectors". In any case it is obvious that a explosimeter must ensure that will not trigger the ignition of the atmosphere in which is immersed: for the marketing is required, therefore, the conformity all'ATEX. Aside from a few models laser, all explosimeters have an input and an output of the gas, which is moved by a small internal compressor.

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