Dewmag Magnetic Thermo – Hygrometer , for use during application of protective coatings.
Thermo-hygrometer containing a combination of a precision hygrometer and two bimetal-thermometers. The relative humidity and temperature scales are so arranged that their indicators cross over a series of dew point indication curves in the centre of the dial. The dew point may be read off directly at the intersection of the two pointers. An integrated bimetal-surface thermometer indicates the surface temperature so difference between dew point and surface temperature can easily be determined.
Powerful magnets are fitted to the back plate to enable it to adhere strongly to iron or steel surfaces. Additionally the gauge has a loop on the top of the back plate for fixing.