ORP, auto calibration pH METER Model : PH-221E * 0 to 14.00 pH, 1,999 mV. * LCD show both pH and the temperature. * ATC or manual Temp. compensation. * Auto calibration for pH 4, pH 7 and pH 10. * Optional pH electrode and the ATC probe. * DC 9V battery (006P). * Meter size : 135 x 60 x 33 mm.
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