The SensoRex pH Electrode pH 16Y977 is a gel-filled, combination pH electrode with a glass body and epoxy body gel filled reference. It has a 12 mm diameter pH bulb and internal Ag/AgCl reference. The electrode has a BNC connector and 1 m cable. It has a 3/4" MNPT process connection and is suitable for use from 0-80°C. The electrode has a fast response time and is designed for laboratory, industrial, and municipal water applications. It requires a pH meter for operation.