dissolved oxygen sensor (0~20mg/l)

Specializing in manufacturing teaching models and instruments for biology, chemistry, physics, geography and physiology education. with the guidance of educational equipment research institute which is under the state education ministry, we are one of the major suppliers with full items for china school education as well as many overseas countries. our products are well-performed at and very popular among more than 25 worldwide countries school labs covering asian, american, european and africa