Digital PH Tester Meter Pocket Pen Aquarium Pool Water Digital Tester

Note:
The new digital tester shouldn't need to be adjusted. When you turn on the tester , you may find the measured value is not accurate and unstable, it's normal phenomenon. Put the digital tester in the liquid that you want to test about 1 minute and you can read the PH. If you find it not accurate, use the Calibration Adjustment Screwdriver (including) to adjust the adjustment trimmer.
Description:
This digital pen style pH meter is an ideal instrument for aquarium, fishing industry, swimming pool,
school laboratory, food & beverage etc. Very excellent, accurate and durable.
Features & details:
Measuring pH Range: 0.0 - 14.0 pH
Resolution: 0.1 pH
Accuracy: ±0.1 pH (20°C), ±0.2 pH
Operating Temperature: 0 - 50°C (32 - 122°F)
Calibration: Manual,1 point  (not including calibration buffer solution)
Item Net Weight: Approx. 57g (after installed batteries)
Dimensions: 152 x 29 x 20mm (5.984 x 1.142 x 0.591 inch)
Package Included:
1 x Digital pH meter
1 x Calibration Adjustment Screwdriver
3 x Batteries Included in pH Meter
1 x User instruction (English)