We know pH levels can be the difference between a great crop and well, a disaster. Measuring and adjusting nutrient solution levels constantly can be time-consuming. And let's face it; you have better things to do. BlueLab's clever pH controller automatically monitors and fine-tunes the pH levels for you. You simply set it, and forget. The pH is taken care of. So you can relax…Features: Built-in Wi-Fi (with the option to disable) View and control on your mobile phone Safety lockouts prevent excessive dosing Automatic control and monitoring of system pH with reservoirs up to 200 US gal / 760 L Plant-safe green backlit LCD with adjustable brightness Large, easy-to-read displays Easy to navigate menu to program and adjust settings Simple push button pH calibration with an on-screen guide Flashing high/low alarm with control lockouts Dosing lockouts to protect from over-dosing Auto resumes dosing on restart after power loss Water-resistant, wall-mount design 13-foot (4 meters) acid/alkali resistant dosing tube supplied Use with undiluted Bluelab pH Up or Down International power supply Replaceable double junction pH probe Separate Bluelab Temperature Probe (for pH ATC) Replaceable peristaltic pump and tubes 2 Year limited warranty on the unit, 6 months for the pH probe Technical Specifications: Control Parameter: pH ”“ user-selectable single direction (up or down)Control Range: 0.1 ”“ 13.9 pHDose Rate: 10ml per minuteResolution: 0.1 pHAccuracy at 25ÌŠC / 77ÌŠF: ± 0.1 pHAutomatic Temperature Compensation: Yes, if the temperature probe is in the same solution as the pH probeOperating Environment: 0 ”“ 50 ÌŠC / 32 ”“ 122 ÌŠFCalibration: Two or three points, pH 7.0 & pH 4.0, and/or pH 10.0 calibrationPower Source: International power supplyCertifications: CE, FCCScreen Display Languages: English; Deutsch; Espanol; Français; NederlandsUser Manual Languages Available: English