HI9920 is an ORP controller with a single set point for user selectable dosage of reducing or oxidizing solutions. A pump or electrovalve can be wired directly to the controller and be powered through the terminals.
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When activated, the alarm contacts will open or close, triggering the mechanism of your choice, whether a buzzer, light or any other electrical device.The alarm is activated when the measurements exceed the operator adjustable threshold of 50 to 250 mV from set point.
The electrodes can be installed quickly and easily. Simply plug the universal BNC connector into the socket and twist it into a secured position.
With proportional control, you can fine-tune your treatment plant and minimize the use of chemicals. The proportional setting can be adjusted through the time cycle from 0 to 90 seconds and the band from 0 to 200 mV. The setpoint can be accurately adjusted through coarse and fine trimmers.
Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller.
See the controller’s status, even from a distance, by observing the dosage or alarm LED’s.
This controller is housed in a rugged, modular, fiber-reinforced ABS housing.