In-line pH meter

process

pH is traditionally measured through glass electrodes. Due to the mechanical weakness of the glass probes, there are many protective measures that must be taken. Further, drifting of glass probes make on-line measurements difficult. Pfaudler has developed an enamelled steel with pH sensible glass. Fitted on an enamelled probe carrier, this pH sensible glass is positioned inside the reactors or in the main flow lines, where the process occurs. At the edge of the pH probe carrier, the pH signal is available online, and it is faultless and precise, whatever the conditions may be. Due to its unique design, the Pfaudler pH measurement system continues to be operational when traditional pH glass probes “give up”: High mechanical stability: probe can be installed in the centre of the liquid flow or close to the agitator Self-cleaning, by flow velocities when installed in turbulent flows Can work at pressures of 10 bar, respectively up to 100 bar for differential pH probes Can be sterilized at 134°C No risk of pollution of reference electrode – almost no drifting One-point calibration – no dismantling required Low maintenance – service intervals of 360 days are possible Almost no consumables: low life-cycle cost On-line acquisition of process data as an indicator of the process progress, improvement of product quality and productivity, contribution to safe operating procedures, low maintenance and low life cycle costs are the benefits of glass-lined pH probes.