BL120 • BL121 • BL122 • BL123 Swimming Pool Controllers for Nutrient Solutions and Irrigation Water The Hanna Instruments® BL12X swimming pool controllers are automatic systems, specially designed to measure and control pH and freechlorine levels. BL122 & BL123 allow remote access and visualizing of measured data via Cloud connectivity. For BL121 & BL123 three analog outputs are available that allow to connect to an external chart recorder or datalogger to monitor any of the three measured parameters. • USB-C • User selectable logging interval · As pool settings normally do not change that quickly, minimize data management by choosing from a wide selection of logging intervals See page 15.24 Updated HI97790 Free and Total Chlorine Portable Photometer The HI97790 meter measures free and total chlorine in water samples from 0.00 to 5.00 mg/L (ppm). The method is an adaptation of the Standard Methods, 4500-Cl G, DPD Colorimetric Method. See page 10.116 www.hannainst.com | New xxi
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