TDS / EC / Temp / PPM Meter Tester with BACKLIGHT + LCD Display + Battery + Leather Carry Case 3 In1 Water Quality Purity Check Tester Monitor Tool Professional Smart TDS/EC/Temp Meter with Titanium alloy probe 3 in 1 High accurate 0.1 LED Digital TDS EC Tester meter water quality monitor ppm 0- 9999 with backlight for RO Serivce Aquarium Lab Equipment Office Supplies Water Safety Pen Type Pocket Sized Handheld Plastic Portable Hydroponic Digital HERE'S WHY: With Advanced Microprocessor Technology ; Measures Electrical Conductivity (µS/cm), TDS (mg/L), Temperature . APPLICATIONS FOR ALL: Water purification, Wastewater plant, Aquaculture, Hydroponics, Colloidal silver, Scientific labs, Pools/Spas, Ecology, Food Processing, Physics/Chem labs, Cosmetics, Home/Office, RVs. NOT JUST ANOTHER ONE: Titanium Probes (Professional grade), Easy Recalibration, BACKLIT Display (Green / Red), Hold Function, Auto Shutdown (60 seconds), SHIFT button (switches between TDS, EC and Temp mode), Automatic Temperature Compensation, Leather pocket with belt clip. Features: 1. BACKLIT DISPLAY: Green(<40ppm) / Red (>40ppm). 2. Lock Reading - To hold off reading after testing, press HOLD button then remove from test solution. 3. Display Mode(s): Press SHIFT button to select the function you want to test i.e Total Dissolved Solids (TDS in ppm & °C/°F) , Electrical Conductivity (EC in µs/cm & °C/°F) and Temperature. 4. Auto Shutdown: water quality tester comes with a automatic shutdown feature, which turns off the device in 1 minute, if idle. - This saves the battery life of the meter. 5. Range: EC: 0-9990µs/cm, TDS: 0-5000ppm, Temp:0-99°C/32.0-212°F 6. Accuracy: ± 2% 7. Net weight: 1.86oz/53g 8. Size: 6 x 1.2 x 0.55 inches (161.9 x 29.4 x 15.9 mm)