This industrial probe has a glass body electrode for use in aggressive chemicals and are easy to clean. A PEI protective sleeve gives the electrode resistance against mechanical stress. Operating limits are -5 to 80°C (23 to 176°F) and pressure up to 6 bar (87 psi).½ " NPT external thread for in-line installationpH electrode with exclusive PTFE non-clogging membranePerfect for continuous flow-thru monitoring in industrial water softening and cooling tower applications.