The ST-710SS Series offer a replaceable, front loading reference electrode assembly. This replacement electrode sensor head eliminates the shortcomings associated with membranes and gel replacement. Also offers reduced polarization time on start-up. The sensor head offers an electrode life-span potential of up to 2 years barring any mismanagement/maintenance negligence. The flat front-end design of the ST-710SS makes this platform less prone to contamination or fouling and is super easy to clean.