Price on request
testo humidity transmitters: testo transmitters for continuous humidity and temperature measurement in HVAC, greenhouses, cleanrooms and industrial processes, from the basic 6621 to the 6681 for critical applications. Configured on request.
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testo 66xx transmitters integrate testo’s highly accurate, long-term stable humidity sensor for continuous humidity and temperature measurement in control systems. The testo 6621 is the basic model with 2 analogue outputs and optional display; the testo 6631 includes a fan for greenhouses and still-air environments.
For critical climate conditions, the testo 6651 and testo 6681 offer self-monitoring with early warnings, Ethernet, relay and analogue outputs, P2A software for parameterisation and adjustment, and special probes for high humidity or aggressive media. They are configured to order.
| testo reference | Version |
|---|---|
| 0555 6621 | testo 6621: temperature and humidity transmitter with 2 analogue outputs |
| 0555 6631 | testo 6631: temperature/humidity transmitter with integrated fan |
| 0555 6651 | testo 6651: transmitter for critical climate conditions |
| 0555 6681 | testo 6681: humidity transmitter for critical applications |
See the specifications table for technical data.
Price on request: add it to your quote request and we will reply with price and lead time.
| Reference | 0555 6621 (testo 6621) |
|---|---|
| Brand | testo |
| Model | testo 6621 / 6631 / 6651 / 6681 |
| Type | Humidity and temperature transmitters for fixed installation |
| Output | Analogue (6621/6631); Ethernet, relay and analogue (6651/6681) |
| Accuracy | testo 6631: ±2.5 %RH |
| Optional | LCD display; special probes for high humidity or aggressive media (6681) |
