Testo 6742 Dew Point Transmitter (1/2 NPT)

0555 6742

Key Features:

  • Measuring range of -50 Ftpd to +86 Ftpd (-45 Ctpd to +30 Ctpd)
  • Specially developed for measuring trace humidity in compressed air or dried process air (such as in a granulate dryer)
  • Based on the Testo humidity sensor with proven long-term stability and reliability
  • NPT 1/2" or G1/2 Metric process connection models
  • User-friendly operation
  • Easy 3-button control via the display menu (6744 Model only)
  • Without display (Models 6742) via the internal interface and optional 0554 3305 Scaling Software for 6740 Series
  • On-site 1-point adjustment
  • Analog output 4 to 20 mA (2-wire)
Product Options:

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This Dewpoint Transmitter provides stability with a resistance to contaminants, all within a fast response time.


Dewpoint Transmitter

Dewpoint Range

-60 to 30°C td

Max temperature (º C)


Dewpoint Accuracy

± 1K at 0°C td

Min temperature (º F)

32º F

Min temperature (º C)

0º C

Max temperature (º F)

122º F

 Max temperature (º C)

30º C

Temp accuracy

±0.5 K (0-50°C)


0.75” W x 1.5” L

Dew point range

–76 to 86°F (–60 to 30°C)

Housing Rating

NEMA 4 Housing

Signal Output

4 to 20 mA

CE Compliance



24 Volts DC

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