A major zinc producer informed us that during operation of the zinc concentrator and thickener, their pH sensors were unable to cope with the solids content and composition, causing the reference junction to persistently clog and foul.
The reduced response and subsequent shortened sensor life were also due to the poisoning of the glass by high concentrations of zinc.
Utilising our zinc resistant glass we provided a replacement sensor in our slurry/viscous design which is able to withstand high velocity and high solid content environments.
This self-cleaning design removes problems due to clogging and fouling of the reference. Sensor life expectancy was increased 6-8 times, and hands-on maintenance time was significantly reduced.