Hydro Instruments manufactures the world's highest quality gas chlorinators, gas chlorination systems and chemical metering equipment. Hydro gas chlorinators & residual chlorine analyzers have become globally recognized as the most ruggedly designed, highest quality and longest lasting available. If you have been using another brand of gas chlorinator, spend a few minutes finding out why Hydro is by far the fastest growing gas chlorination equipment manufacturer in the market. We also manufacture corporation stops in a variety of sizes and materials. Our product line includes: chlorine gas feeders, residual chlorine analyzers and chlorination equipment, ejectors, dechlorination systems, calibration columns and corporation stops for chemical injection.                                      ISO 9001                                               COMPLIANT                 CE MARK