The measurement of pH in pure water has met with variable success. The high resistivity of pure water, vulnerability of the sample to contamination, variability of reference electrodes and additional temperature effects converge to make this a particularly challenging measurement.
For more information see the applicatiuo note below.
The Jenway Environmental electrode is available from camlab order code 1136165 and costs £139.00 (BNC Connector)
The Camlab equivalent electrode is order code 1161705 ( BNC Connector and 1m Cable)
Cable adaptors are available which will allow you to connect probes from alternative manufacturers to your pH meter.