BL-122-20 AUTOMATIC POOL CONTROLLER OF PH AND ORP WITH ETHERNET, FLOW CELL

BL122 is designed to maintain constant pH and disinfectant levels in swimming pools, hot tubs, and spas and offer the added benefit of allowing remote connection and access to devices via the Hanna Cloud web app.
These controllers are available in two configurations. The basic version is the in-line model which allows for direct installation of probe and chemical injection fittings into existing piping. A panel mounted version with a bypass flow cell is also available. The bypass flow cell allows for calibration and maintenance of the probe without having to shut down the recirculation pump.
For compliance monitoring, BL122 has a built-in datalogger. Measurement readings are logged every 10 seconds with a new log starting for each new day or when the instrument is calibrated.
Logged data include pH, ORP, and temperature values, last calibration data, setup configuration, and any event data.
The chlorine level is measured based on the ORP or REDOX principle. An increase of the ORP value correlates with an increase of the free chlorine level. pH and disinfectant tests are made together for more efficient disinfection and control. The efficacy of sanitisers is dependent on a controlled pH value. The ORP value is the most consistent indicator of the sanitising effectiveness of the pool/hot tub or water treatment. Typically 650-750 mV at 7.2 pH indicates proper water treatment (all harmful bacteria are killed in less than 1s). pH and disinfectant tests are made using the HI-1036-1802 combined electrode installed in-line or in flow cell. To prevent the ground loop effects from causing erratic readings and damage to the system the electrode has a matching pin considered the ‘earth ground’ connection.
It was specially designed to detect the broken electrode based on a shifted isopotential value. The HI-1036-1802 uses an Ag/AgCl reference with 3.5 M KCl. The ORP values are referenced to it.