The SENSOREX S223CD pH Electrode is a combination pH electrode with a glass body, double junction reference, and BNC connector. It has a pH range of 0-14 pH, temperature range of 0-80°C, and 12/120 mm dimensions. This electrode is designed for laboratory use in aqueous solutions with a fast response time. It requires storage solution and regular calibration for accurate measurements. The S223CD has a 1 year warranty.