The Hanna Instruments HI 98103B is a hand-held pH meter with manual two-point calibration, a replaceable electrode, and an LCD screen. The meter provides readings from 0.00 to 14.00 pH (+ or - 0.2), with a resolution of 0.01 pH. It is designed for beer and beverage making, but can be used for other applications; it is an alternative to litmus paper. Manual two-point calibration for increased control and accuracy; instructions manual provided with this item. Replaceable electrode to prolong life of meter. Provides pH readings from 0.00 to 14.00 pH (+ or - 0.2), with a resolution of 0.01 pH. Two 1.5V batteries (included) provide approximately 3,000 hours of continuous use. Measures 66 x 50 x 25 mm/2.6 x 2.0 x 1.0 inches (H x W x D) for holding in one hand. *This product is Recertified. A recertified product is one that is returned by a customer, for whatever reason, and then restored to original working condition after undergoing an intensive inspection process by qualified technicians. The recertified product is then offered at a substantially discounted price. All stock of our current products are guaranteed to be in working condition and have been successfully tested for optimal performance. 7 day return policy is in effect for both in-store and online purchases. See in store for more details.