DescriptionPH-20 pen type pH meter is used to test the pH of water. The instrument is suitable for water monitoring, aquaculture, environmental protection, printing and dyeing, , beverage industry and research institutes for water quality.Technical DataspH Measuring Range: 0.0 - 14.0 pHResolution: 0.1 pHAccuracy: ±0.1 pHTemperature Measuring Range: 0 - 50°C (32 - 122°F)Calibration: 3 point(4.0 6.9 9.2)Operating Temperature: 0 - 50°C (32 - 122°F)Power Supply: 1.5 V button battery（LR44）*4PCSWeight: 88gSize: 185mm*40mm(H*Dia.)NoteAll products have been checked and packaged in good condition before shipping.After your order is confirmed,the product will be sent to your hands for 7-13 workdays.If you have any question, please feel free to contact with us . We will try our to give you a satisfactory solution.We are committed to providing good quality services, if you have any needs, welcome to consult，we will do our best to meet 。