DMT340 Series Dewpoint and Temperature Transmitters for Very Dry Conditions

The Vaisala DRYCAP®Dewpoint and Temperature Transmitter Series DMT340is designed for industrial low humidity applications. Typicalapplications include compressed air drying and metal treatment.

DMT341: The DMT341 is made for installations in dry rooms where the entire dew point transmitter needs to be inside the dry space. The concept is easy to clean and suitable also for cleanrooms.

DMT342: The DMT342 probe is installed using a flange or sampling cell. The small probe is ideal for integration into larger Equipment.

DMT344: The DMT344 features a threaded connection for extended pressures with different fitting-body options. It is ideal for permanent installation into pressurized or vacuum processes.

DMT347: The DMT347 probe is ideal for tight spaces with a thread connection. The small probe is installed using Swagelok® connectors.The DMT347 probe is ideal for tight spaces with a thread connection. The small probe is installed using Swagelok® connectors.

DMT348: The DMT348 is ideal for installation into pressurized processes where the probe needs to be able to be removed while the process is running. The probe depth is adjustable.

  • Five different probe types designed to meet variousinstallation requirements
  • Vaisala DRYCAP®Sensor provides accurate, reliable measurement withexcellent long-term stability and fast response time
  • Condensation-resistant
  • Unique auto-calibration feature
  • Graphical display and keypad for convenient operation
  • Optional alarm relays and mains power supply module
  • Integrated data logging with over four years of measurementhistory
  • LAN and WLAN communication options
  • NIST traceable calibration (certificate included)


Sensor Vaisala DRYCAP®180M

Measurement range              -70 ... +80 °C (-94 ... +176 °F) Td

For continuous use               -70 ... +45 °C (-94 ... +113 °F) Td

Accuracy up to 20 bar/290 psia                             ±2 °C/±3.6 °F

    20 ... 50 bar/290 ... 725 psia                            additional inaccuracy +1 °C Td

Dew point accuracy vs. measurement conditions

Response time 63% [90%] at +20 °C gas temperature

Flow rate 1 l/min and 1 bar pressure                   -60 ... -20 °C Td (-76 ... -4 °F Td) 5 s [10 s]

                                                                        -20 ... -60 °C Td (-4 ... -76 °F Td) 45 s [10 min]


Measurement range 0 ... +80 °C (+32 ... +176 °F)

Accuracy                                                            ±0.2 °C at room temperature

Temperature sensor                                            Pt100 RTD Class F0.1 IEC 60751


Measurement range                                             0 ... 70 %RH

Accuracy (RH <10 %RH, at + 20 °C)                    ±0.004 %RH + 20% of reading


Measurement range (typical)                                 10 ... 2500 ppm

Accuracy (at + 20 °C, 1 bar)                                 1 ppm + 20% of reading

Other measurement parameters available (model-dependent): mixing ratio, absolute humidity, pressure

dew point calculated to 1 bar, temperature difference (T-Td), water vapor pressure

Related Products

« Back to list