Smart Digital Water Tester: This digital TDS meter measures Total Dissolved Solids (TDS), Electrical Conductivity (EC), and temperature (°C/°F) in a single pen, making it ideal for tap water, RO systems, aquariums, hydroponics, and pools. You no longer need separate devices to test your water quality across different home scenarios. One-Button Quick Calibration & Portable Design: This digital TDS meter supports auto-calibration within 1-3 seconds and features auto shut-off to conserve battery life. Automatic Temperature Compensation (ATC) for Consistent Accuracy: Whether you're testing cold tap water for drinking or warm water in a hydroponic reservoir, the built-in ATC ensures consistent EC and TDS readings across any temperature range. No manual adjustments required-just dip and read for reliable results every time. Instant Color-Smart Water Quality Indicator: The smart color display provides immediate visual feedback: bright green when your drinking water or RO-filtered water reads 0-50 PPM, and red at 50+ PPM. Simply dip the water testing pen and read the result in 0.5 seconds with ±2 accuracy. A Great Gift for Water Quality Enthusiasts: This water quality tester makes a thoughtful and practical gift for new homeowners, health-conscious families, outdoor campers, RV travelers, or anyone maintaining a freshwater aquarium or swimming pool., Weight: 0.330693393 Pounds, Manufacturer: Teuypty