- Measure pH, EC (Conductivity) and TDS (Total Dissolved Solids) with just one instrument!
- Easy to use
- Automatic Temperature Compensation (ATC)
- Calibrate probe anywhere in seconds
- Displays in Celsius with Press of Button
CLICK on this link Hanna Instruments HI 9813-6N Waterproof pH/EC/TDS Meter Clean & Calibration Check for Growers to buy or for more information from Amazon.com