ORP is used in cooling towers where it provides an effective measurement of oxidizing biocides. ORP sensors are installed alongside pH sensors and are monitored continuously throughout the process. Specialized insertions are often needed to enable safe and convenient access to the sensors and prevent outages during maintenance. Sensor maintenance can be minimized with the appropriate sensor design, in particular, the housing material, reference junction, and reference electrolyte. This is critical as sensors are often located in remote areas.