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See Chinese contents: GB 15322.1-2003 GB 15322.1-2003: Combustible gas detectors -- Part 1: Point type detectors for 0~100% LEL combustible gas
This part of GB 15322 specifies the definition, classification, technical requirement, test method, marking, inspection rule and operating instruction of the point type detectors for combustible gas. This part applies to the point type detectors for 0~100% LEL combustible gas installed and used by general industrial buildings and civil buildings. This part also applies to those special detectors installed in other environments with special requirements, unless it is specified by relevant standards separately.
