The PCWI Wet Sponge Porosity Detector is designed to non-destructively detect pinholes in coatings up to 500um using the “wet sponge method”. A voltage from the battery supply is transmitted through the probe and dampened sponge attached. Because the instrument’s earth is connected to the substrate, when a flaw is encountered, the conductive path is made and the alarm sounds.
The unit features three test voltage options; 9V for coatings up to 300um, 67.5V for coating assessment to ASTM standards, and 90V for coatings up to 500um.
Please note: while the PCWI Wet Sponge Detector has a maximum range of 500um, we highly recommend that coatings over 150um, or coatings in corrosive environments, be high voltage porosity tested.