RPI Test Tube pH Pen, Glass Probe, Atc

Highly stable and accurate readings with a large LCD display. Designed for simple one-hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize any buffer. Features hold function, and auto power off with low battery indicator. Variety of probes available for all applications: Glass Probe is EPA compliant for laboratories and wine. The case is IP65 waterproof and will float if accidentally dropped into the water. Supplied with 2 button-cell batteries and a built-in electrode that is kept moist with a protective cap.