Soluble Salt Meter versus the Bresle Patch Method

The approved ISO8502-9 equivalent fully automated soluble salt meter establishes surface cleanliness on the job and determines salt contamination.

Equivalent to the Bresle test, the soluble salt meter will indicate contamination of soluble salts on blast-cleaned surfaces prior to coating but with the added bonus of a very short test cycle time. Till a few years people were forced to take these measurements with a 20 year old technique using patches. This was a tedious and time consuming task using a lot of ECO unfriendly expensive consumables. Differences in results lead to discussions and reasons for concern in the field.

The Bresle Method was first introduced in 1995 and has been widely accepted. However the method:

  • Has a large variation in results due to the many manual process steps
  • Is tedious & time consuming
  • Leaves residue on the surface; Requires Post Clean-up Process
  • Is costly; each measurement requires a new Bresle patch
  • Requires manual record keeping
  • Uses syringes in industrial practices

Since innovation cannot be stopped, the goals in developing the Soluble Salt Meter were:

  • Improve the time, quality, and accuracy in field analysis
  • Eliminate use of syringe needles
  • Develop a paperless instrument
  • Automate water dosing and washing system
  • Eliminate consumables (patches and syringes)
  • Exactly replicate the Bresle Patch protocol
  • Eliminate residue left behind from Bresle Patches

The Soluble Salt Meter is the first approved ISO8502-9 equivalent method, which automates soluble salt measurements. The patented design provides a hand held paperless solution to measure the presence of soluble salts on flat and curved surfaces.

The Soluble Salt Meter (SSM) combines surface salt extraction and conductivity measurement in one tool, allowing convenient and ergonomic operation.

The hand held design provides a self-contained, easily transportable, unit for soluble salt measurements. Find out how you can save time and money on your salt measurements and ask for a price quote today.

Side-by-Side comparison

The SSM test protocol exactly duplicates the Bresle process, except that measurements are automated and there are no consumables.

The complete test sequence requires only one minute. The SSM is approved as an authorized alternative to the Bresle patch method.

  Bresle Patch Method Soluble Salt Meter
Compartment Area 1250 ± 13 mm2 (square).Can vary an additional 5% due to stretching 1250 mm2 (circular). Fixed footprint
Attachment Method Adhesive. Leaves residue; Requires post measurement cleanup Magnetic. No effect on surface quality; Proven to seal over deep pits
Water Injection Method Manually with syringe (3.0 ± ? ml). Prone to human error and injury Automated and accurate with dispenser (3.0 ± 0.04 ml)
Dissolving salts from the surface By rubbing the surface of the Bresle Patch. Duration and intensity inspector dependent Automatic, according to fixed procedure and duration
Measurement Remove solution with syringe and measure it with separate conductivity meter Automatic
Recording Manually on paper Automatic storage in memory
Consumables per measurement Bresle Patch and deionized water Only deionized water

Process measurement steps


Step #1 Select Bresle patch, remove the protective paper and the punched-out material
Step #2 Adhere patch to surface (attempting to minimize trapped air)
Step #3 Fill syringe with 3ml deionized water
Step #4 Inject half of the water into the patch
Step #5 Reposition needle and evacuate air
Step #6 Remove the needle from the patch. Holding the syringe with the needle pointing upwards, expel the air
Step #7 Re-insert the needle into the compartment and inject the remainder of the solvent
Step #8 Agitate Bresle patch with finger for 10-20 seconds
Step #9 Extract solution using syringe
Step #10 Transfer solution in syringe to Horiba B-173 meter
Step #11 Take reading
Step #12 Record reading by hand on QA sheet; NOTE: ISO 8502-6 dictates that during steps 3 to 10, it is essential that no solvent be lost from the patch or syringe. If any solvent is lost, the solution obtained shall be rejected.
Step #13 Remove Bresle patch from surface
Step #14 Wipe remaining water from surface with rag
Step #15 Clean any adhesive remaining on surface
Step #16 Clean and rinse out syringe
Step #17 Clean Horiba meter.
Process / Time


Step #1 Attach meter to surface
Step #2 Inject deionized water into measurement chamber with one press of the dose bottle
Step #3 Meter automatically agitates solution (~ 20 seconds)
Step #4 Meter automatically takes reading, displays it on the LCD screen and stores values electronically
Step #5 Wipe remaining water from surface after removing SSM
Step #6 Flush meter by turning over and injecting water from dose bottle
Process / Time

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