The best of the best! The fastest response, highest accuracy, and best reproducibility that you can get with a pH electrode ? plus a 2 year warranty.  ROSS Ultra pH electrodes combine all the benefits of the ROSS line with an extended life expectancy and minimized long-term drift.  The ROSS reference offers stable, fast results regardless of temperature or sample composition. 

Reference electrode for precise pH determinations

The general purpose, top performance combination electrode.

Recommended for test tubes and small diameter sample containers

Toughened bulb for rugged lab use and precise Q.C. measurements

Fits in test tubes and small diameter sample containers

Measures pH of soft, moist surfaces both solid and semi-solid

General purpose when precise pH determination is required

Includes a built in temperature sensor for easier measurement of pH samples