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Hanna Groline Combo pH PPM Temp meter HI9814 - DS Urban Farm / DS Garden Supplies
Portable pH/EC/TDS Temperature Meter w/ CAL Check | Forestry Suppliers, Inc.
PH/EC/TDS/TEMP METER HANNA HI 9814 - Agroponix: Online store for Growing, Gardening, Hydroponics, Aquaponics, Aeroponics, Holticulture, Fertilizers & more
Hanna Instruments HI 9813-6N Waterproof pH/EC/TDS Temperature Meter Clean and Calibration Check for Growers, 0 to 50 Degree C, 9V Battery: Amazon.com: Industrial & Scientific