Hanna HI 9813-6N pH-EC-TDS Meter

Tired of your digital pen being just a bit off? Then select this proven workhorse for all your indoor growing needs. This hand-held electrode reads pH, TDS, and EC and displays readings clearly on an LCD display. The electrode probe allows you to take readings fast and easy even in hard-to-reach reservoirs. Reads ranges: 0.0 to 14.0 pH, 0 to 1999 ppm, 0.00 to 4.00 mS/cm. Accurate to 0.2 pH or 2% f.s. and is adjusted for a wide temperature range. Warranty is for 2 years on the body and 6 months on the electrode. Includes a 9 volt battery and initial calibration fluids.