Digital PH Garden Meter for Water Ph Meter Electronic ATC Applicable to all types of water (lake, river, drinking, technical). The set includes 2 sachets of powder for calibration solution (pH 4,01 and pH 6,89). Application of pH meter: pH meter is designed to measure the pH level (concentration of free hydrogen ions in water) in aquariums, swimming pools, boilers, water treatment systems, etc. Characteristics of the device: pH measurement range: 0 – 14 Built-in sensor for automatic ATC temperature compensation (0 to 50C) Operating temperature: 0-50C Resolution: 0,1 pH - Accuracy: 0,1 pH Single-point calibration with a calibration screwdriver (included) Power supply: 2 x 3V batteries (CR2032) included Battery life: more than 1000 hours Dimensions: 150 x 29 x 20 mm Storage and transport: Before pH transport, meters are calibrated in acid-salt solution and dried. Therefore, do not worry if after the first opening of the cap you find a white deposit on the electrode. The glass electrode, which is a key element when measuring pH, can dry out during long storage – avoid drying out the electrode. After the first calibration, keep the pH meter in a dish with acidified water to a pH of 4. During transport, pour a few drops of buffer solution into the black protective cap to prevent the glass electrode from drying out and reduce the need for frequent calibration. If the pH meter is stored without a solution, its indications may start to deviate from reality by 0,1 after a month. Measurement instructions: To measure, do not immerse the device directly in the solution container. First, take 20 ml solution (np. Using a disposable syringe), then transfer the sample to a clean cup. Dip the pH electrode of the meter into the sample, lekko mix and wait 30 seconds. Then turn on the pH meter. When the pH indications stop changing, you can read the pH value. After measuring, rinse the pH meter in a separate cup of distilled water to remove the solution residue, and place the device in a storage dish filled with acidified buffer solution with a pH of 4.