In the industrial water treatment industry, chlorine tests are used to control bio lm in cooling systems. These tests use the iodometric drop test method or the DPD method to detect free and total chlorine. In the cleaning and sanitation industry our chlorine test kits are used to verify the concentration levels of chlorine. They are used to test chlorine levels in alkaline cleaners, sanitizer applications, wash water treatment and waste water treatment. Concentration levels are represented in ppm. Each kit is packaged in a durable plastic case and includes all items to complete approximately 60-75 tests.