Greisinger-p H-Transmitter-Without-Electrode-GPHU-014-MP-Cinch-BNC-Greisinger-GPHU-14-P-The-Greisinger-GPHU-014-MP-BNC-p H-is-a-High-Quality-p H-Transmitter-designed-to-provide-a-standard-4-to-20m A-current-output-which-is-proportional-to-the-p H-being-measured-Its-small-size-&-encapsulated-construction-allow-for-easy-installation-&-will-accommodate-any-p H-electrode-with-a-BNC-Connector-P-P-The-temperature-compensation-is-either-manual-or-automatic-when-Pt 1000-temperature-probe-is-connec