Information about this product [Convenient use] 5 seconds know water quality, accuracy, faster. This kit includes the TDS PH EC temperature. Good value for money, trustworthy quality, all this makes it the first water quality test. [ACCURATE MEASUREMENTS] - Using the pH meter, you can determine the pH value in the range of 0,00-14,00 pH with an accuracy of 0,01, the conductivity meter determines the EC value in the range of 0-9990 µs/cm and the TDS value in the range of 0-9990 ppm with an accuracy of 2%. Conductivity meter can also be used to measure temperature in C and F [AUTOMATIC CALIBRATION] - Both measuring devices can be calibrated with the touch of a button. Just hold the device in the right solution and press the button. The measuring device will be recalibrated after a few seconds [MEASUREMENT OF ALL LIQUIDS] - Measuring devices can be used to determine water quality in swimming pools, salt water pools, hot tubs, aquariums, ponds, drinking water and osmosis, and many other liquids. [Wide Application]: Ideal for home and laboratory pH measurement, including drinking water, electroplating fluid, kettle water, aquarium water, pool water, photo rinse, well water, deep phreatic water, aquaculture, food processing and more. What is TDS? TDS meter: TDS stands for Total dissolved solids. The higher the value of the TDS meter, the more dissolved substances are in the test liquid. The smaller the value, the higher the water quality. What does EC mean? EC stands for "Electrical Conductivity", which in German means "electrical conductivity" of soluble salts in a liquid. The smaller the value, the less electron ions are in the test liquid. 1. The new pH meter has already been calibrated. It can be used directly. 2. During calibration, the tester should be thoroughly cleaned and dried before each immersion. 3. The TDS/EC is calibrated automatically and does not require manual calibration. How to use: 1, Clean the electrode in distilled water. Mix 4.01 Ph powder with a glass of distilled water (250 ml) and shake. Dip the electrode into the mixed water and press the CAL button, wait about 5 seconds for the digital screen to show 4,01. 2, Mix the powder ph 6,86 with a glass of distilled water (250 ml) and shake. Dip the electrode into the mixed water and press the CAL button, wait about 5 seconds for the digital screen to show 6,86. 3, Mix the powder ph 9,18 with a glass of distilled water (250 ml) and shake. Dip the electrode into the mixed water and press the CAL button, wait about 5 seconds for the digital screen to show 9,18. 4, Carefully clean and dry the Ph tester. Turn off the meter. Charging time: about 200 minutes - With automatic temperature compensation (ATC) - Measuring range: 0,00 - 14,00pH - Resolution: 0,01pH - Accuracy: /- 0,01pH - Automatic temperature compensation: 0-80 - Calibration: automatic - Power supply: 2 x 1,5V (button cell) - Operating temperature: 0-80 - Lifespan: about 500 hours - Dimensions: 155 x 31 x 18mm Temperature measuring device TDS EC Technical data: Lock function - makes it easy to read and write, just press the HOLD button and remove the test solution. 4 display modes: Press SHIFT, TDS - ppm and C, EC - μs/cm and C, TDS - ppm and F, EC - μs/cm and F. Automatic shutdown after 5 minutes so that the battery does not run out. Measuring range: conductivity: 0 - 9990 μs/cm TDS: 0-9990 ppm (parts per million) degrees Celsius: 0,1 - 80,0 C, Fahrenheit: 32.0 - 176.0 F Accuracy: 2% Size: 154 x 30 x 14 mm Tips: TDS Total Dissolved Solids, which is salt, metal or mineral in water. Contents of the pack: 1 x Blue pH Meter (Built-in Button Battery) 1 x white water quality detector TDS EC (built-in button battery) 3 x Calibration Kits 2 x instruction manual (Polish language is not guaranteed)