Digital Ph Meter + TDS Tester Aquarium Pool Hydroponic Water Monitor 0-9999 PPM

YOU WILL GET 1 PH METER, & 1 Portable Digital TDS3 TEMP PPM Tester TDS Meter, PLUS 1 OF EACH packs of popular pH buffer solutions,pH4.00, pH6.86 & Batteries Included.. Don't be fooled by others selling without Batteries as they can cost upwards to $5.00 Best Price on eBay...& Remember always FREE SHIPPING Batteries already installed in BOTH units & with BOTH SOLUTION Specifications pH Calibration Buffer Powder for pH4.00, pH6.86 Powder buffer solution provide indefinite or long shelf life and stability, ideal for low volume use. Each pack makes 250mL of buffer solution. It's lightweight, inexpensive and takes up very little space. These buffers are accurate to within ±0.01pH units at 25°C and remain stable over long periods of time. Directions For Use Completely empty the powder into a clean 250mL glass beaker. Add 250mL of Deionized Water to the beaker. Stir until the powder has completely dissolved. pH solution accuracy is ±0.01pH °C pH4.00 pH6.86 10 4.00 6.92 15 4.00 6.90 20 4.00 6.88 25 4.00 6.86 30 4.01 6.85 35 4.02 6.84 40 4.03 6.84