有毒作业分级中,常用检测管进行毒物浓度测定。它又称气体测定管、气体检知管、检气管,是一种内径一致、紧密填充显色指示粉的细玻璃管,一般管长120～180毫米,内径2～6毫米。管内的指示粉用涂渍显色化学试剂的载体制成,指示粉的进气端或两端填充保护剂,两端用衬塞固定、熔封。? Toxic job classification, commonly used test tube for determination of poisons concentration. It is also called gas measuring tube, gas detecting tube and gas detecting tube. It is a fine glass tube with uniform inner diameter and compact color indicator powder. The tube length is usually 120-180 mm and the inner diameter is 2-6 mm. The indicator powder in the tube is made of a carrier coated with a color-developing chemical reagent to instruct the inlet end or both ends of the powder to be filled with a protective agent, and both ends of the powder are fixed with a plug and fused. ?