Offering IP67 waterproof protection, the included electrode has a built-in temperature sensor and also contains a mini-amplifier to render your measurements impervious to noise and electrical interference found in environments like plating baths. Features include stability indicator and auto-shutoff. The large display has graphic symbols to guide you through all operations. At startup, a self-check is performed and the remaining battery level is displayed. Automatic calibrations are performed at one or two points using standard buffers. Extended Range -2.00 - 16.00 pH