Hydro-Air PH3000 ,PH3000D, PH300, P30  controllers offer an unrivaled user friendliness in measurement of pH and ORP. Its minimalistic design offers the most convenient operation than any analyzers. The operation and calibration can be performed easily with a friendly step-by-step interface. From drinking water to agriculture, our controller is very practicable in many situations thanks to flexibility for different ranges of measurement. Besides, the controller is well-equipped with analogue output and Field Bus Connection RS-485 communication.