Is the MKIII Purge Monitor good enough for stainless steel welding?
This instrument has become the world standard for measuring Argon purge quality in welding tubes, pipes and tanks. It shows when the oxygen has been removed down to 0.1% (1,000 PPM) and that there are no leaks or other causes for oxygen to remain in the presence of a weld. Once 0.1% has been reached, coking, blackening and serious oxidation does not occur. Those applications requiring improved degrees of cleanliness can set a procedure to wait 1 or 2 minutes after the 0.1% level has been reached.