Water BOD testing instrument, professional for measuring the degree of organic pollution in water. The biochemical oxygen demand BOD analyzer in water developed and produced by Erun Group adopts HJ505 national standard 5-day biochemical culture method, supplemented by simple, safe and reliable mercury-free pressure difference sensing method to analysis BOD concentration in water, which can ensure the accuracy and reliability of the testing results. It is suitable for environmental monitoring, sewage treatment and other fields, and is the preferred tool for environmental activists and enterprises.