PH Test Pen, High Accuracy Pen Type pH Meter Measurement Probe plus/- 2 0.2ph pH Tester Digital Water Testing Tool for Drinking Water Aquariums Swimming Pool(PH Test Pen)

Specification:Condition: 100% brand newItem type: PH Test PenMaterial: plasticColor: As picture shownWeight: Approx. 98g  Battery name: cell battery x 4Battery capacity: 160mahBattery model: LR44Measuring range: 0.0 ~ 14.0phResolution: 0.1PHAccuracy: ± 0.1ph (@ 20 ?) /±0.2phWorking environment: 0 ~ 50 ? RH ? 95%Calibration: one-point calibrationPH calibration: 1. Insert the electrode into a mixed phosphate standard buffer solution with a pH value of 6.86 (25 ° C), and gently shake it a few times until the indicated value is stable. 2. Adjust the calibration potentiometer with a small screwdriver until the displayed value matches the pH value of the standard buffer solution at ambient temperature. 3. Cleaning the electrode, and absorb the water absorbed on the electrode with filter paper. 4. Insert the electrode into ph4.01 potassium hydrogen phthalate or ph9.18 borax standard buffer solution. The displayed value should be within the allowable range of error compared with the pH value of the buffer solution. Package List:1 x PH Test Pen 1 x Instruction 1 x Accessory