Humidity Transmitters
The models of Testo 6651 & 6681 are positioned in the middle to upper performance range, they are designed for the monitoring of critical climate in process engineering and also in compressed air technology. The demanding measurement is realized with the further developed Testo humidity sensor, with its well-known and highly-valued long term stability. Unmatched state-of-art technology in humidity measurement, with solutions for highest accuracy as well as for special applications (high humidity, humidity in H2O2, trace humidity etc.) is provided.
Both instrument series present many innovations, including world firsts such as Profibus interface in the humidity transmitter's Testo 6681 and an Ethernet interface in the transmitters Testo 6681 and testo 6651.
It is a completely newly developed generation of instruments, which in particular offers solutions for safe and service-friendly use, meaning high reliability and operational security for industry.
- Exchangeable probes.
- Early warning reports
- Variable possibilities for adjustment.
In addition they also continue to use already existing technology such as the external interface for communication, for example for the parameterization and adjustment software P2A from testo.
Technical Specifications
- Measuring Range
- 0-100 %RH, -20 to +70oC (Wall Version)
- 0-100%RH, -40 to 180oC (Cable and duct Version)
- Display: 2 line LCD with Backlite.
- Accuracy: + 2.5% RH, 0.5oC
- Output: 4-20 mADC - 2 wire/4wire, 0-10VDC
- Relay Output: 2 NO+NC contacts optional
- Power Supply: 24VDC.
- Enclosure: ABS Plastic.
Areas of applicationStationary humidity measurement in production/process technology
- Drying processes
- Food
- Bio research
- Mushroom farming
- Special areas high humidity
- Sterilization processes in H2O2-atmospheres
Stationary measurement of indoor ambient conditions
- Monitoring comfort levels
- Museums
- Storage of hygroscopic substances
- Storage of electronic components.
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