The HI98131 is a slim, lightweight, and waterproof pocket tester that measures pH, conductivity (EC), TDS (ppm), and temperature. Simple, two-button meter operation and advanced features, including a selectable EC to TDS conversion factor (0.5 - 500 ppm and 0.7 - 700 ppm). for your essential testing.

• All measurements in a single, hassle-free tester.
• Quick Cal solutions to calibrate pH and conductivity all at once with a single solution.
• Perfect for hydroponics, greenhouse, and agriculture use.