Bluelab Guardian Connect pH/EC/TDS Meter

Key features of Guardian: -Large "Plant Safe" display with green LEDs to prevent stress. -Measures pH from 0.00 to 14.00 pH -Measures EC from 0.0 to 5.0 EC, 0 to 50 CF, 0 to 2500 TDS, 0 to 3500 ppm 700. -Measures temperature from 0 to 50 ºC and 32 to 122 ºF. -Selectable values for both EC and temperature. -pH calibration with a simple button. -No calibration needed for EC or temperature. -Silent (visual) alarm for high and low values. -Retains programmed values even during power outages (non-volatile memory). -Automatic temperature compensation. -Water-resistant (splash-proof). -2-year Bluelab warranty (6-month warranty for the electrode). -Adjustable screen brightness