Check the listing for details. 2-Pack PH Meter PH Level Test Pen Electrode Sensor Reader for Pond, Tape Water. Condition: New. Listed at 18.99 USD. PH Meter Digital PH Tester 0.01 High Accuracy PH Meter for Water, 0-14.0 PH Measurement Range, PH Meter with ATC for Drinking Water, Food, Brewing, Pool and Aquarium About the item: [ 𝐅𝐀𝐒𝐓 𝐀𝐍𝐃 𝐀𝐂𝐂𝐔𝐑𝐀𝐓𝐄 ] Ensure your pool, general hydroponics pH or even drinking water has a perfect pH balance and safe for use with Tester precision pH accuracy. Tester has a sensitive electrode sensor to read accurate pH levels. The included detailed manual will show you how to get the best accurate and stable reading.[ 𝐀𝐔𝐓𝐎𝐌𝐀𝐓𝐈𝐂 𝐓𝐄𝐌𝐏𝐄𝐑𝐀𝐓𝐔𝐑𝐄 ] pH meter has a built-in temperature sensor.When the temperature of the sample solution is different from that of the standard solution, the automatic temperature compensation system (ATC) adjusts the temperature to accurately measure 0°C-80°C (32°F-176 °F).[ 𝐖𝐈𝐃𝐄 𝐔𝐒𝐄 𝐏𝐇 𝐌𝐄𝐓𝐄𝐑 ] Pocket Size pH Meter is the ideal test kit for home and laboratory uses. Ideal use to test for water, pools, aquariums, spas, hydroponics, food, wine and beer making and more.[ 𝐀𝐔𝐓𝐎𝐌𝐀𝐓𝐈𝐂 𝐂𝐀𝐋𝐈𝐁𝐑𝐀𝐓𝐈𝐎𝐍 ] pH meter has an automatic calibration function that can be adjusted according to water temperature and quality, and the pH reading can be obtained by just waiting a few seconds in the testing. Calibrate the tester with one touch button “CAL”using Calibration Buffer Powder. How to use:1.Take off the pen cover and clean the electrode with pure water2.Put the pen probe into the solution, taking care not to exceed the water level3.Turn on the switch, stir gently, and wait for the reading to stabilize4.After the reading is stable, read the displayed value5.After the test, clean the electrode with pure water, dry the water on the pen tip in time, and cover the pen cover back. Standard configuration:2x pH meter, 2x user manual, 4x 1.5V LR44 button cells(build-in), 6x pH Buffer Powders.