Testo 6740 Trace Humidity Sensor
Description
Description
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.
Testo 6740 Trace Humidity Sensor Specs
| 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, ppmv, mg/m3, °C, °F |
| Resolution | 12 bit |
| Accuracy | ±40µA |
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