Portable Digital LCD TDS-3 Drinking Water Meter, Water Quality Tester Pen with Temperature and PPM Measurement, Water Purity Tester 0-9990 PPM, Suitable for Drinking Water and Hydroponic Growing (Does

Function: Test the quality of different waters, ensuring you enjoy the best water quality and temperature ((Cannot test pH or the concentration of dissolved substances in water).)

Hold Function: Saves measurements for easy reading and recording.

Auto Function: Turns off the meter after 10 minutes of inactivity to conserve battery power.

Dual Range: Measures from 0-999 ppm with a resolution of 1 ppm. From 1,000 to 9,900 ppm, the resolution is 10 ppm.

Suitable Applications: This item can be used in water purifiers and filters, food (vegetables, fruits) and beverage quality monitoring, swimming pools, spas, aquariums, and hydroponics.