Adoption of the most advanced Teflon diaphragm with large ring section to make the electrode with stable liquid juntion; • Strong anti-interference ability; It is not easy to be polluted and blocked; Long life; • The reference system is filled with the high polymer; Convenient use; It is unnecessary to refilling electrolyte. • Sensitive response of electrode (the measured value 95%can be reached up in several seconds); • PH range: 0~14pH the temperature range: 0~110º C; • Pressure resistance of the electrode: 0.6MP and the zero potential E0=7pH • Outer tube material: Glass or PPS plastic • The external dimension of the electrode is φ12x120, 225 or other dimensions.