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Dr.Health (TM) TDS-3 Digital Pocket Size TDS Meter, Water Quality Purity Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

This TDS tester is ideal for all water purification applications and wastewater regulation,Calibration: When you test it, push the "TEMP" button in the middle for a few seconds until you see the PPM number flashing then push "HOLD" button to go up and push "ON/OFF" button to go down. When calibration is done, push the "TEMP" button again for a few seconds until it goes to constant display.

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Dr.Health TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. It can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million). It is a great tool for drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and SPAs, and more.TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. The lower the TDS level, the purer the water, with 0 ppm being pure H2O.Features:- Shows the TDS value instantly after being immersed into liquid- Hold Function: Freeze the measurement to view it out of the water.- Auto-off function: the meter shuts off automatically after 6 minutes of non-use to conserve batteries.Specification:- Range: 0～9990ppm(mg/L)- Temperature range: 0-99℃ or 32-212℉- Accuracy: ±2%- Temperature compensation: 0-60°C.- Operating voltage: 2 x 1.5V- Battery life: approx. 1000 hrs- Operating temp: 0℃～60℃- Calibration: factory calibrated- Auto-off time: 6 min- Volume: 142×25×15mm3- Weight: 1.27 ozCalibration:When you test it, push the "TEMP" button in the middle for a few seconds until you see the PPM number flashing then push "HOLD" button to go up and push "ON/OFF" button to go down.When calibration is done, push the "TEMP" button again for a few seconds until it goes to constant display.Package list:- 1 X TDS meter- 1 X protective case- 1 X User manualNote:- Its temperature measurement function is mainly used to compensate the small deviation of TDS value measurement under different temperature conditions and the display is not instant-read, so it is not recommended for professional temperature measurement.

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