The Digital TDS-4TM Water Meter is ideal for testing applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, water ionizers, drinking water and more
Temperature Button: Test water temperature, 31 - 200 F degrees, 1 F degree resolution.Hold Function: saves measurements for convenient reading and recording.
Auto-off function - Turns off meter after 10 minutes of non-use to conserve batteries.
The smallest and lightest TDS meter available on the market.Highly Efficient and Accurate Due to Its Advanced Microprocessor Technology.