Convenient UseRemove the cap from the pen. Press the power button to fill 2/3 of the cap with the water to be tested. Immerse the pen in the water to be tested and gently stir to remove bubbles. air in the pen. Wait for the reading to stabilize (approximately 3 seconds) and watch the reading on the screenUsefulCan accurately measure EC, easily detect the concentration of plant culture solution, and help plants grow healthily. Measurement range: 0-1999US 0-19.99ms. Resolution: 1us 0.01mS. Measurement accuracy: 2% F.S. Automatic temperature compensation: 0-50. Operating temperature: 0-50CBacklit LCD ScreenSmall and lightweight, easy to carry, with backlit LCD screen, it can read clearly and accurately even in dark environments. Power supply 4 x 1.5V AG13 button cells (not included)Automatic Temperature CompensationWith ATC function, it can solve the problem of inaccurate measurements caused by liquid temperature changes; easily obtain reliable and stable readingsWide ApplicationIdeal for home and laboratory pH testing, including drinking water, boiler water, aquarium water, swimming pool water, photography flushing fluid, etc. well water, deep groundwater, aquaculture, food processing and moreSpecifications:Measurement range: 0-1999US 0-19.99msResolution: 1us 0.01mSMeasurement Accuracy: 2% F.SAutomatic temperature compensation: 0-50Operating temperature: 0-50CPower supply: 4X1.5V AG13 button battery (not included)Characteristics :- Can accurately measure EC, easily detect the concentration of plant culture solution, and help plants grow healthily.-Small and light, easy to carry, with backlit LCD screen, it can read clearly and accurately even in dark environments.- Automatic Temperature Compensation: With ATC function, it can solve the problem of inaccurate measurements caused by liquid temperature changes; easily obtain reliable and stable readings.- Wide range of applications: very suitable for home and laboratory testing applications and aquariums, hydroponics, etc.Packing list :1 X EC Meter1 X Screwdriver1 X Manual