Testo 6740 Trace Humidity Sensor

Ideal for monitoring compressed air dryers and preventing system damage from condensing water vapor.

Testo 6740 Trace Humidity Sensor — Testo 6740 Humidity Sensor

Starting at $1,785.00 Starting at $1,606.50

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Manufactured

By Testo

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Availability

Usually ships in 3-5 business days

Product Manual Product Specs

Features

Pressure Dew Point Temperature: -60 to 30°Ctpd
Temperature Range: 0 to 50°C
Atmospheric Dew Point: -80 to -15°Ctd (at 30 bar rel.); -70 to +10°Ctd (at 3 bar rel.); -60 to +30°Ctd (at 0 bar rel.)
Pressure Resistance: Up to 50 bar absolute
Analog Output Signal: 4-20 mA (2-wire)
Scaling: Freely scalable via display/buttons
Output Variables: °Ctpd, °Ftpd, °CtA (atm. dew point), °FtA, %RH, ppm_v, mg/m³, °C, °F
Resolution: 12 bit
Accuracy: ±40µA

The Testo 6740 trace humidity sensor monitors moisture levels in air and compressed gasses. The Testo 6740 two-wire unit provides a scalable 4-20mA output signal and can be ordered with or without a local display. Calibrated to ±1% relative humidity and long-term sensor stability makes the 6740 ideal for monitoring compressed air dryers and preventing system damage from condensing water vapor.

The Testo 6740 trace humidity sensor can be configured for a variety of applications. An optional connecting plug can be added to the Testo 6740 to provide 2 limit signal alarms with LED status outputs to ensure your process is within tolerance. The sensor can be installed directly in-line or combined with measuring chamber and cooling coils to suit specific application.

The Testo 6740 housing rotates 350° and can be ordered with a ½" NPT or G1/2 process connection for ease of installation. The Testo 6740 is a simple, flexible, and cost effective sensor for trace humidity monitoring.

Spec Sheets

Testo 6740 Humidity Sensor Data Sheet (422 KB)

Manuals

Testo 6740 Trace Humidity Sensor Manual (608 KB)

Links

All possible part numbers

Testo Connection Plug

Testo Connection Plug

Connection plug with 2 alarm points for Testo 6740 Series Trace Humidity Sensor.

$339.00 $305.10

Testo Measurement Chamber

Testo Measurement Chamber

Measuring Chamber for Testo Dew Point Transmitters .

$322.00 $289.80

Testo Cooling Coil

Testo Cooling Coil

Cooling coil for Measuring Chamber .

$347.00 $312.30

This product can be used in the following applications:

Compressed Air

Need Help? Call a Temperature engineer at 1-800-884-4967

We're open Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET

Rhys D.
Applications Engineer

Shawn D.
Senior Applications Engineer
20 years at Instrumart

Ron J.
Temperature Engineering Lead
29 years at Instrumart

Dwight M.
Senior Applications Engineer
28 years at Instrumart

David S.
Applications Engineer

Luke M.
Applications Engineer
5 years at Instrumart

Alex A.
Senior Applications Engineer
19 years at Instrumart

Rhys D.
Applications Engineer

Shawn D.
Senior Applications Engineer
20 years at Instrumart

Ron J.
Temperature Engineering Lead
29 years at Instrumart

Dwight M.
Senior Applications Engineer
28 years at Instrumart

David S.
Applications Engineer

Luke M.
Applications Engineer
5 years at Instrumart

Alex A.
Senior Applications Engineer
19 years at Instrumart

Rhys D.
Applications Engineer

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Testo 6740 Trace Humidity Sensor