The HI21211 controller is a simple, digital pH controller (Wall Mounted) specifically designed to meet your process control requirements. A host of self testing features and user-friendly functions make HI21211 a great value.
Request a quotation
5 in stock
This product cannot be purchased online. Fill in the form to get a quotation, thank you.
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.
To enhance troubleshooting and the ability to record data while monitoring, simply attach a recording device to the instrument’s 4 to 20 mA output contacts, conveniently located on the front panel, to obtain a copy of the results on demand.
Housed in a rugged, modular, fiber-reinforced polypropylene housing that will resist the harmful effects of most chemicals.
HI21211 has mounting holes molded into the housing to assure simple, quick and secure installation without the need for additional hardware.
A differential input prevents problems due to ground loop current, extending the life of the electrodes.
The Hanna password protection feature keeps these controllers safe from tampering. Only users with the proper password can change the settings of these controllers.