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Vaisala DMT340 Series Dewpoint and Temperature Transmitter

The Vaisala DMT340 Series Dewpoint and Temperature Transmitter is designed for industrial low humidity applications. Typical
applications include compressed air drying, plastic drying and metal treatment. The device is very reliable, easy to use and economical to maintain. The Vaisala DRYCAP® Sensor is immune to particulate contamination, water condensation, oil vapor and most chemicals.


The Vaisala DMT340 Series Dewpoint and Temperature Transmitter comes with a unique auto-calibration function which ensures low maintenance and high performance. The DMT340 is also available with graphical display with real-time trending and a datalogging facility.


The DMT340 series has several versatile output and communications options. It can be connected to a network via (W)LAN to allow wireless connection. It also benefits from multiple serial connection options, USB, RS232 or RS485.


The recorded measurement data can be easily viewed on the graphical display or downloaded to a PC via Windows Software.

Several versions are available to suit the specific needs of individual applications.


 Vaisala DMT340 Series Dewpoint and Temperature Transmitter Models…

  • DMT342 With Small Size Flanged Probe for Use with Sampling Cell
  • DMT344 For Pressurized Processes
  • DMT345 For measurement in hot and dry processes (Up to 180°C)
  • DMT346 With passive cooling for very hot processes (Up to 350°C, with cooling fins)
  • DMT347 With Small Pressure-tight Probe
  • DMT348 For Pressurized Pipelines, available with hot tap removal ball valve



Fluidic are a recognised partner of Vaisala CEN (Industrial division) for Scotland and the North of England.  Our instrumentation engineers are product trained and able to help with instrument selection within the full range of Vaisala relative humidity and dewpoint transmitters.  Please call either office for more information (Glasgow 0141 641 5920,  Warrington 01925 572401).



  • Download Vaisala DMT340 series Dewpoint Transmitter Datasheet
  • Download Vaisala DMT345 & DMT346 Dewpoint for High Temperature and Humidity Datasheet
  • Download Vaisala DMT340 series Operating Manual
  • Download Vaisala DMT345 & 346 Operating Manual
  • Download Dewpoint Measurement in Compressed Air FAQ
  • Download Dewpoint Application - Plastics drying
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