Complete 4-Bottle Starter Kit: Includes pH 4

plus three replacement cartridges to keep your water clean for months to come

Construction: Waterproof

Designed to make a good shower even better

0 mS/cm = 1400 ppm on the 442 scale or

Hanna HI-70004P pH 4.01 Buffer Sachets, 25 x 20 mL sachets HM Digital PH-80 Complete 4-Bottle Starter Kit: IncludesHI 70004P 25 x 20ml sachets pH 4. 01 buffer solution The pH 4. 01 buffer solution is available in quick and easy to use 20ml sachets, one of the most commonly used buffer solutions. It is extremely stable and represents the mid way point in the acid range of the pH scale ideal for those requiring an accurate acid reading, particularly those working in water purification plants, the food industry, and wherever the pH is expected to be acidic. The