The CVS Dew Point Tester is a chilled mirror apparatus, which operates by attaining the conditions necessary by the definition of dew point.

When a gas is cooled out of contact with liquid water, the content remains constant but the percentage saturation increases until it reaches 100 percent and moisture begins to condense. The temperature at this point is known as the dew point.

The CVS Dew Point Tester is a rugged, reliable, mobile instrument that requires no calibration and is primarily used to measure the moisture content in any gas. Conforms to ASTM D 1142 and GPA 2140 standards.