Features: brand new and high quality Portable TDS meter can be carried anywhere to measure water quality such as Hydroponics, Drinking Water, tap water, RO system water, aquarium, seawater, pool water, etc. High-accuracy algorithm chip and electrode of our digital water ph tester ensure an accurate and fast response. When the measured value is stable, just press the HOLD/TEMP for key to lock the measured value and take it out for viewing, which is really simple. Digital pH tester has the functions of monitoring TDS, pH, salinity, EC meter and temperature measurement. Temperature can affect reading levels, Digital PH Meter for water hydroponics has an even better range of 0 C-50 C (32 F-122 F), automatic temperature compensation can ensure that you are getting the best reading, so you can test with confidence in any environment. IP67 is an international waterproof and dustproof certification. for Protection against dust intrusion, short-time immersion. Specifications: Material: ABS Size: 183x37mm/ 37.2x 1.46 in Conductivity test range: 0 to10000uS/for cm 10.01-19.99ms 20.1-400mS/for CM Resolution: 1uS/for cm; 0.1mS/for CM Accuracy: 2% of reading Tds test range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt Resolution: 1ppm;; 0.1ppt Accuracy: 2% of reading Salinity measurement range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (0.1%) 5.10-25.00% (1%) pH test range: 0.01-14.00pH Resolution: 0.01pH Accuracy: 0.05pH Temperature compensation: automatic temperature compensation (ATC) Working environment: 0 to 60.0C (32.0-140F); RH 100% TDS factor: 0.4to 1.0 Temperature range: 0.1-60.0 32.0-140 Temperature accuracy: 0.5 Temperature resolution: 0.1/ Display: Support NO backlight Waterproof rating: IP67 Power consumption: 2.9 mA, shutdown power consumption is 0 The accuracy is more accurate within 150ppt, and the deviation above 160ppt is relatively large. Note: Every for time you use it up, you must clean the electrode About instrument calibration Conductivity EC: support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms) with 3 built-in calibration points (1413us /for cm 12.88ms /for cm 111.8ms /for cm) PH: calibration solution can be automatically identified at 1 point (6.86) or 2 points (6.86 4.00) (6.86 9.18) or 3 points (6.86 4.00 9.18) PH measurement range Describe the details of the selling point above, attracting and providing trust to your potential users. Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Digital Water Tester