According to the national standard “Occupational Exposure Limits for Harmful Factors in the Workplace GBZ2-2002”, the maximum allowable ammonia concentration in the workshop is 30mg / M3, which is about 39.5ppm. In the actual application of ammonia detector, the following values are usually referred to: Average threshold (TLV-TWA): 25 (generally set as a first-level alarm […]
