DPT146 Dewpoint and Pressure Transmitter for Compressed Air

The Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed Air makes monitoring compressed air simple and convenient. The DPT146 measures both dew point and process pressure simultaneously, and is the ideal choice for anyone using or monitoring compressed air.

Make More Informed Decisions

For the first time, dew point data - whether calculated to atmospheric pressure or providing ppm - is constantly pressure compensated online and in real-time so there is no ambiguity in the information. Decision making and corrective actions can now be based on more reliable and accurate data. Regulative requirements, for example for medical gas, can also be fulfilled more easily and quickly.

Measured Parameter

Dew point


Pressure, absolute

1...10 bar

Temperature (available if output RS-485 only selected)


Calculated Parameters

ppm moisture, by volume


Dew point converted to atmospheric pressure



Dew point accuracy


Pressure accuracy at +23°C

±0,4 % v. Ew. 

Pressure temperature dependence

±0,1% v. Ew./10°C

Temperature accuracy





PPM accuracy

7 bar

±(14ppm + 12% v. Mw.)

Sensor Response Time

Pressure response time


Dew point response time 63% [90%] bei +20°C, 1 bar

-50 -> -10°C Tdf

5s [10s]

-10 -> -50°C Tdf

10s [2,5min]

DATASHEET» DPT146.en.pdf (1014kB)