Flexibility, reliability and low maintenance are among the benefits offered by the EXA PH402 pH analyzer. Designed to meet the exacting requirements of measuring pH and ORP in the modern industrial environment, it contains many features to ensure the best precision whatever the application. This 4-wire unit is housed in a robust IP65 field mountable case. Two mA outputs, four relays, digital communication and a clear LCD make the PH402 a truly comprehensive package.