Elcometer 135B Bresle patches
The original Elcometer 135B patches are used to determine the chloride contamination of a surface; they have a self-adhesive rubber film and a sealed compartment for sampling steel surfaces for soluble impurities with a suitable solvent.
Elcometer 135B Bresle Patches can also be used with the Elcometer 138C Bresle Salinity Kit.