Vaisala DRYCAP® Handheld Dew Point Meter DM70 measures dew point temperature accurately in a measurement range from −60 °C up to +60 °C (−76 ... +140 °F) depending on the probe model. DM70 incorporates the advanced DRYCAP® technology, which enables reliable and high-performance dew point measurement. DM70 measures the following parameters:
| Parameter | Abbreviation | Metric unit | Non-metric unit |
|---|---|---|---|
| Relative humidity | RH | %RH | %RH |
| Temperature | T | °C | °F |
| Dew point/frost point temperature 1 | Td/f | °C | °F |
| Dew point temperature 2 | Td | °C | °F |
| Dew point in the atmospheric pressure | Td | °C atm | °F atm |
| Dew point/frost point in the atmospheric pressure | Td/f | °C atm | °F atm |
| Absolute humidity | a | g/m3 | gr/ft3 |
| Mixing ratio | x | g/kg | gr/lb |
| Water concentration / Water mass fraction | H2O | ppmv / ppmw | ppmv / ppmw |
DM70 consists of 2 main units: the MI70 indicator and DMP74 probe, models A, B, or C. DM70 can be used with the optional sampling cell to measure process dew point. With DSS70A, DM70 forms a part of a complete portable sampling system for measuring process dew point.
1 Td/f shows dew point temperature above the freezing point (0 °C/32 °F) and frost point temperature
Tf (dew point over ice) below the freezing point. This is considered as the industry standard.
2 Td shows dew point over water throughout the entire measurement range.