Elcometer 138 Bresle Kit & Patches

The surface density of soluble salts can be tested by using the Elcometer 135B Bresle Patch together with a conductivity meter, test strips which change colour or titration tubes. Outlined below is the procedure for testing the surface with the Elcometer 135B and a conductivity meter.

Please note that this is intended as a guide only. The relevant ISO standard should be referred to for precise instructions.

1. Remove the protective paper and the square in the centre of the patch.
2. Attach the Elcometer 135B Bresle Patch to a dry and clean test surface.
3. Measure a given amount of distilled water into a measuring tube or beaker, clean the syringe using this water.
4. Using a conductivity meter, measure the electrical conductivity of the distilled water in the measuring tube.
5. Using the water in the measuring tube or beaker, inject a given amount into the Bresle Patch which is adhered to the test surface.
6. Pump the water back and forth between the syringe and the patch, to dissolve the soluble salts on the test surface.
7. Remove all the distilled water from the patch using the syringe and return it to the measuring tube or beaker.
8. Re-measure the electrical conductivity of the water