Patent ID: 8166799

Claim:
A gas concentration distribution measuring apparatus, comprising: a gas detection part which includes a plurality of gas detectors provided at a plurality of mutually different positions to measure a concentration of a predetermined gas, and which moves while maintaining relative positions of the plurality of gas detectors; a gas detector position information measuring part which measures position information of the plurality of gas detectors of the gas detection part; and a gas concentration distribution display unit to which measured values of gas concentrations measured by the plurality of gas detectors of the gas detection part and position information of the plurality of gas detectors measured by the gas detector position information measuring part when the plurality of gas detectors finish measurement of gas concentrations are inputted, and which displays a distribution of concentrations of the predetermined gas in a space, in which the gas detection part moves, based on the measured values of the gas concentrations and the position information of the gas detectors, wherein each gas detector includes a surface acoustic wave element including at least one surface acoustic wave circulating path which is circularly continuous with a portion of a spherical shape and along which a surface acoustic wave is capable to circulate, and each gas detector includes a filter which covers the surface acoustic wave element and which prevents foreign matter excluding gases from coming into contact with the surface acoustic wave circulating path of the surface acoustic wave element, and a gas exchange element which exchanges a gas contained in a space enclosed by the filter for a gas in an outer space surrounding the filter.