
Temperature and Humidity Transmitter for Critical Climate applications - testo 6681
Model No: testo 6681
Part No: 0555 6681
Testo 6681 temperature and humidity transmitter is designed for monitoring critical climate in industrial processes (e.g. production/process engineering). If these involve maximum precision or specialized applications (high humidity, trace humidity, etc.), then this climate transmitter is the ideal choice because, when it comes to humidity measurement, it features unrivalled cutting-edge technology
- High-precision Testo humidity sensor with long-term stability for high humidity applications (optional)
- Ethernet, relay and analog outputs enable optimum integration into individual automation systems
- High-quality digital probes and an intelligent calibration concept
- Self-monitoring and an early warning function ensure high system availability
Industrial humidity measurement requires absolute professionalism in measuring and control technology. In industrial processes or in research-based business, the testo 6681 temperature and humidity transmitter is ideal wherever critical climatic values need to be maintained. The climate transmitter boasts a high-precision humidity sensor with long-term stability (optionally available), which enables it to achieve maximum precision: up to ±(1.0 + 0.007 * reading)
Precise measuring and control technology will help you to accurately optimize the climatic conditions in your rooms in order to prevent process disruptions and quality losses. Automation systems result in particularly efficient processes. The testo 6681 temperature and humidity transmitter can easily be integrated into individual automation systems because it features Ethernet, relay and analog outputs.
Areas of application for the testo 6681 temperature and humidity transmitter
- Drying processes (e.g. drying tobacco, manufacturing ceramics, drying roofing tiles)
- Painting installations
- Food production (e.g. cheese processing, ripening fruit, drying pasta)
- Bio-research
- Breeding mushrooms
- High-humidity specialist fields
- Sterilization processes in an H2O2 environment
- Clean rooms
- Museums
- Storing hygroscopic substances
- Storing electronic components
Technical highlights of the testo 6681 climate transmitter
- High-quality digital probes available for the temperature and humidity transmitter: e.g. high-precision Testo humidity sensor with long-term stability, probe for high-humidity measurement, probe for trace humidity measurement, probe with a self-monitoring function (for measuring in sensor-damaging media)
- Smart probe technology: probe can be changed by the user, digital interface for the temperature and humidity transmitter, intelligent calibration concept
- Ethernet, relay and analog outputs allow for versatile use of the temperature and humidity transmitter: e.g. for control purposes (2 or optionally 3 analog outputs), for direct activation of units in the air conditioning system (optionally via relay) or even in climate monitoring systems (optionally via Ethernet connection)
- P2A software for parametrization, adjustment and analysis saves time and money during commissioning and maintenance
- Optimum protection: the climate transmitter features a robust metal housing and is protected against water jets according to protection class IP 65. Protective caps are also optionally available for specific applications (made of stainless steel, PTFE, wire mesh filter or metal). A patented H2O2 protective cap is also available to order
- 2-line display: the climate transmitter is optionally available with a display, enabling you to undertake commissioning, adjustment and analysis without using a PC
- Options for self-monitoring and early warning function: guarantees high system availability
In combination with the right probe, the testo 6681 temperature and humidity transmitter offers superior properties and benefits in comparison with a conventional climate transmitter because, when it comes to temperature and humidity measurement, this instrument features supreme, cutting-edge technology.
Note: Please note that the transmitter can only be operated with a probe. The probes are optionally available
Measurement parameters | |
---|---|
Humidity – Measuring range | 0 to 100 %RH |
Trace humidity – Measuring range | -60 to +30 °Ctd / -76 to +86 °Ftd (only with testo 6610 L15) |
Selectable units | Dewpoint in °Ctd/°Ftd |
Temperature – Measuring range | Dependent on probe (testo 661x) |
Selectable units | Temperature in °C/°F |
Inputs and outputs – Analog outputs | |
Output type | 0/4 to 20 mA (2-wire/4-wire) 0 to 1/5/10 V (4-wire) |
Accuracy of the analog outputs | 0/4 to 20 mA ± 0.03 mA 0 to 1 V ±1.5 mV 0 to 5 V ±7.5 mV 0 to 10 V ±15 mV |
Further outputs | |
Ethernet | Optional: module can be fitted as intermediary layer |
Relays | Optional: 4 relays (free allocation to measurement channels or as collective alarm with operating menu/PsA software), up to 250 V AC/DC / 3 A (NO/NC) |
Other outputs | Mini DIN for Testo P2A software |
Voltage Supply | 2-wire: 24 VDC ±10 % 4-wire: 20 to 30 VAC/DC |
Current consumption | max. 300 mA |
Technical data probe range testo 6610 | |
testo 6611 | |
Type | Wall |
Operating range | Room climate probe wall mounting |
Humidity – Measuring range | 0 to 100 %RH |
Temperature – Measuring range | -20 to +70 °C/ -4 to +158 °F |
testo 6612 | |
Type | Cable |
Operating range | Process humidity probe duct mounting |
Humidity – Measuring range | 0 to 100 %RH |
Temperature – Measuring range | -30 to +150 °C/ -22 to +248 °F |
testo 6613 | |
Type | Cable |
Operating range | Process humidity probe flexible with cable |
Humidity – Measuring range | 0 to 100 %RH |
Temperature – Measuring range | -40 to +180 °C/-40 to +356 °F |
testo 6614 | |
Type | Heated Cable |
Operating range | Humidity probe for high humidity applications / when risk of condensation |
Humidity – Measuring range | 0 to 100 %RH |
Temperature – Measuring range | -40 to +180 °C/-40 to +356 °F -40 to +180 °C/- 40 to +356 °F |
testo 6615 | |
Type | Cable trace humidity (selfadjustment) |
Operating range | Humidity probe for trace humidity / dewpoint (with self adjustment) |
Humidity – Measuring range | -60 to +30 °Ctd / -76 to +86 °Ftd |
Temperature – Measuring range | -40 to +120 °C/ -40 to +248 °F |
testo 6617 | |
Type | Cable with cover electrode monitoring |
Operating range | Humidity probe with self-monitoring for sensor-damaging media |
Humidity – Measuring range | 0 to 100 %RH |
Temperature – Measuring range | -40 to +180 °C/- 40 to +356 °F |
General Technical Data – Probes | |
Probe shaft | Stainless steel |
Cable | FEP coated |
Plug | Plastic ABS |
Probe dimensions (diameter) | 12 mm |
Probe dimensions (probe shaft length) | 70/120/200/300/500/800 mm |
Cable length | 1/2/5/10 m |
