Air Systems' breathing air quality test kits are designed to test the air produced by both low pressure compressors (use model LP-A4) and high pressure air in cylinders (use model HP-A4 or HP-A445). The tests are accomplished through the use of low cost detector tubes providing a "go/no go" test of the air quality. If a high reading is found, this signals potentially unacceptable breathing air quality and a laboratory analysis of the breathing air must be made to determine the exact readings of the air quality in order to take corrective action.