TEMP/PPM Water Meter Quality Testing Pen 0-9999 PPM PH TDS Meter Tester Portable Water Purity Filter Measuring Tools Features: 100% new and high quality The TDS meter tester can be used in: water purifiers and filters, food (vegetable,fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics etc. Hold function: Saves measurements for convenient reading and recording. Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteries. Press "TEMP" button can shift temperature meter between fahrenheit degree and centigrade degree. Measures Range: 0-9990ppm, with a resolution of 1ppm. From 1,000 to 9,990ppm, the resolution is 10ppm, indicated by drinking x 10image, factory calibrated. Applicable industries: water laboratories, CDC, the aquaculture industry, hospitals, swimming pools, household tap water quality testing. Specifications: Shell Material: Plastic Main Color: Yellow, White ,Gray Range: 0~9999ppm Accuracy: +/-2% Battery: 2 x 1.5v LR44 Button Cell Batteries (Included) Size: Approx. 15.5 x 3 x 1.6cm Please refer below standard for testing water 0~50ppm --------- High Purity Water 50~100ppm --------- Pure Water 100~300ppm --------- General Pure Water 300~600ppm --------- Fouling 600~1000ppm --------- Poor Taste Water,Fouling Above 1000ppm --------- The water is not suitable for drinking Package Included: 1 x Water Quality Tester Note: Please allow 0~1cm error due to manual measurement.Thanks! Photos will be slightly different from different display screen. _x000D_