Does anyone know of a company that can provide a verification service for an (obsolete) MESA 90DX conductivity meter?
As far as we know it's accurate, so doesn't need recalibrating as such, but we need a certificate to say it's in spec to use it in anger.
If it can't be certified it may have to be scrapped, but finding funds to replace what is only our spare / backup meter will not be without difficulty
Matt