Inline pH electrode system - For continual online pH measurement. Quick release inline pH electrode holder - PES-1-QR The PES-1-QR is out inline pH electrode holder for use in 3/4" pipework. The unit allows a pH electrode to be held in pipework to give a continuous online pH measurement when accompanied with an appropriate pH instrument. The PES-1-QR allows the quick release of the pH electrode for maintenance or buffering / calibration. The inline pH electrode system forms part of the pipework as a permanent installation and the pH electrode can be easily removed in minutes without the need for special tools. Inline pH electrode system for larger diameter pipes - PES-2-QR For larger diameter pipework we offer the PES-2-QR which works with our PS183-20B from the industrial pH probe range. The PES-2-QR is designed to become part of the pipework and the specially manufactured quick release fitting is designed to allow the pH probe to be removed easily form inline pH electrode system in minutes - without the need for special tools. The PES-2-QR inline pH electrode system is normally solvent welded into 2" diameter pipework. Retractable pH electrode system - Lock-n-Load The lock-n-load inline pH electrode system differs from our standard range by offering a unique internally sealed retractable mechanism. With normal inline pH electrode systems the process needs to be stopped and the measured fluid needs to be isolated and drained before the pH electrode can be removed. With the Lock 'N' Load system - the process doesn't need to be stopped the pH probe in the Lock 'N' Load is simply retracted, locked into place, and the probe can be removed while the system is completely sealed. There are no need for valves, retaining cables, or special tools - the lock 'n' load means that probes can be removed from pipework in a matter of minutes.