Dew point recorder DWY 1

The atmospheric influence of humidity and temperature during the different seasons can change the conditions during fabrication remarkably.

The same way as humidity condenses on a cool glass of beer, this can also happen on Aluminium surfaces. The water condensed on the metal surface is a source of Hydrogen and leads to an increased porosity. The difference in temperature between air and metal and the relative humidity are the parameters that determine condensation. A table in the application reference shows the dew point at various temperature differences and humidities. A dew-point calculator is available as well.

MIG WELD now also offers a device which measures air temperature, metal temperature and the relative humidity and provides a direct readout about weldability.

Principle of operation

The sensors for temperature and relative humidity are well protected within a massive Aluminium case.

With an external sensor the surface temperature of the welded part is measured. A personal computer connected via USB displays all values graphically and numerically. Furthermore it displays welding yes/no.