ph meter digital original 009 (I)A

pH-009 (I)A Original ATC pH Meter Alat Ukur Air Hidroponik Digital Tester Keasaman Cairan Pocket Pen . Features: 100% brand new ,high quality ,excellent after-sale service .The electrode has been used(laid) for long time from the last calibration. The electrode has been used in particularly taxing conditions .The utmost accuracy is required Specifications: Batteries: 3 x 1.5V(AG-13 Button Battery) Life: approx. 700hours of use Accuracy:+-0.1pH(at200C/680F) Dimensions:150mm x 29mm x 20mm Net weight:123g Original box: YES Packaging size: 180*60*30mm Package weight: 140g Color: Red Packing Content: 1 x Pen Type pH Meter 1 x Screwdriver 1 x PH 4.00 substances (250ml) 1 x PH 6.86 substances (250ml) PH CALIBRATION: 1.Immerse the electrode in pH 6.86 (under the temperature of 25℃)standard buffer solution of phosphate, and gently shake the electrode. 2.Regulate the trimmer with a screwdriver until the buffer solution value corresponding to the measurement temperature is obtained. 3.Immerse the electrode in ph4.01 or ph 9.18 the standard buffer solution of borax. 4,After about one minute, until the buffer solution value corresponding to the measurement temperature is obtained.