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Vaisala DMT143 Miniature Dew Point Probe

Vaisala DMT143 miniature dew point transmitters are designed with OEM applications in mind such as compressed air dryer lines. Vaisala DMT143 are easy to integrate and can be used in conjunction with the Vaisala DM70 portable device. The long probe version, DMT143L has replaced Vaisala’s now discontinued  DMT242 dew point transmitter.

Vaisala DMT143 Dew Point Transmitter Features & Specifications
  • Vaisala DRYCAP® sensor technology with auto-calibration
  • Fast response time of about 5sec typically (see details in datasheet)
  • Compact design of approx. 92mm x 28mm DIA
  • 3 wire design with mA or voltage outputs
  • With RS-485 non isolated output
  • Dew point measurement range down to -70°C (scaling from -80°C)
  • Uncertainty within ±2 ºC (see datasheet for full info)
  • Resistant to condensation
  • Compatible with Vaisala DRYCAP® Hand-Held Dewpoint Meter DM70
  • Comes with factory calibration certificate as standard
    • recommended 2 year calibration interval (or less, as per your requirements)
  • LED alarm for exceeded dew point level
  • Measuring environment: nitrogen, hydrogen, argon, helium, and oxygen
  • Pressure rating: 0 … 50 bara (725 psia)


Vaisala DRYCAP® technology

Vaisala DMT143 includes industry proven DRYCAP® Dew Point sensor technology. The transmitter can be installed directly into pressurized systems at 50 bar (725 psia) maximum pressure. The long term high performance is achieved with Vaisala DRYCAP® technology. Vaisala DRYCAP® fully withstands getting wet, and therefore, the transmitter performs exceptionally well in applications that occasionally experience process water spikes, such as pipeline condensation during a system failure or start-up.  The sensor is also highly resistant to particulate contamination, oil vapor, and most chemicals, and is insensitive to the flow rate.


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 Dewpoint, Humidity and Carbon Dioxide (CO2) instrumentation.  Please call either office for more information (Glasgow 0141 641 5920,  Warrington 01925 572401).


  • Download Vaisala DMT143 Dew Point Transmitter Datasheet
  • Download Vaisala DMT143L Dew Point Transmitter Datasheet
  • Download Vaisala DMT143 Multilingual Quick Guide
  • Download Vaisala DMT143 Full User Manual in English
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