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Testo 0555 6681 6681 Temperature and Humidity Transmitter

  • Brand Testo
  • Part # 0555 6681
  • Model # 6681
  • Condition
    Brand New

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0555 6681, The industrial humidity transmitter

Note: Please note that the transmitter can only be operated with a probe. The probes are optionally available.

Features with all optional accessories:

  • Optimum adjustment concept thanks to adjustability of the entire signal chain incl. analog adjustment
  • Ethernet, relay and analog outputs allow optimum integration into individual automation systems
  • Self-monitoring and early warning guarantee high system availability
  • Calculation and presentation of all relevant humidity parameters
  • P2A software for parameterization, adjustment and analysis saves time and costs in commissioning and maintenance
  • Display with multi-language display
  • Robust, easy-to-clean metal housing

Applications:

  • 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:

  • High-quality digital probes available for the temperature/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/humidity transmitter, intelligent calibration concept
  • Ethernet, relay and analog outputs allow for versatile use of the temperature/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 temperature/humidity 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 humidity measurement, this instrument features unrivalled, cutting-edge technology.

Industrial humidity measurement demands absolute professionalism. Not only in running the system, but also in the measuring technology used. The industrial humidity transmitter testo 6681, combined with the probe series testo 661x fulfils these high demands. The testo 6681 has a number of additional features, above and beyond the properties and benefits of a conventional transmitter, which will delight practitioners. This and other reasons make the testo 6681 the first choice in drying technology, trace humidity and compressed air process technology, as well as in demanding air conditioning technology, e.g. in cleanrooms.

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.

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Technical Details

Reviews
Subject to the use of all the optional accessories.
Humidity
Selectable unitsDependent on probe, available are:relative humidity %RH; normed atm. dewpoint in°CtdA (°Ftd); dewpoint in °Ctd (°Ftd); absolutehumidity in g/m³ (gr/ft³); degree of humidity ing/kg (gr/lb); enthalpy in kj/kg (BTU/lb);psychrometer temperature in °Ctw (°Ftw); watervapour partial pressure in hPa/H20; watercontent in ppmV; mixture dewpoint H2O2 in°Ctm/°Ftm; %RH acc. to WMO; temperature in°C/°F
Measuring range0 to 100 %RH
Trace humidity
Selectable unitsTemperature in °C/°F
Measuring range-60 to +30 °Ctd / -76 to +86 °Ftd (only with testo 6610 L15)
Analog outputs
Quantity2, optionally 3 channels (channel freely selectable)
Output type0/4 to 20 mA (2-wire/4-wire) 0 to 1/5/10 V (4-wire)
Measuring rate1/s
Galvanic isolationGalvanic isolation of the output signals (2-wire and 4-wire), isolation of supply from outputs (4-wire)
Resolution12 bit
Accuracy of the analogoutputs0/4 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
Max. load500 Ω at 24 VAC/DC
Further outputs
EthernetOptional: module can be fitted asintermediary layer
RelaysOptional: 4 relays (free allocation tomeasurement channels or as collective alarmwith operating menu/P2A software), up to 250VDC /3 A (NO/NC)
Other outputsMini DIN for Testo P2A software
Power
Voltage supply2-wire: 24 VDC ±10 %,4-wire: 20 to 30 VAC/DC
Current consumptionmax. 300 mA
General technical dataDesign
MaterialMetal
Dimensions4.8 x 6.37 x 3.03 in (without probe)
Weight3.3 lb (without probe, withoutProfibus/Ethernet module)
Display
DisplayOptional: 2-line LCD with clear text line andrelay status display
Resolution0.1 %RH / °Ctd / °Ftd / °Ctw / °Ftwor 0.01 °C/°F 1g / kg / g/m³ / ppm
Operation
Parameterization4 operating buttons for display / P2A software
Installation
Probe connectionDigital plug connection
Miscellaneous
Protection classIP65
EMC2004/108/EG
Operating conditions
Operating temperature(with integrated relay)-40 to +60 °C
Without displayOperating temperature-40 to +70 °C / -40 to +158 °F
Storage temperature-40 to +80 °C / -40 to +176 °F
With displayOperating temperature0 to +50 °C / +32 to +122 °F
Storage temperature-40 to +80 °C / -40 to +176 °F
Probes
Type6611Wall6612Cable6613Cable6614Heated cable6615Cable trace humidity (selfadjustment)6617Cable with cover electrode monitoring
Operating rangeRoom climate probe wall mountingProcess humidity probe duct mountingProcess humidity probe flexible with cableHumidity probe for high humidity applications / when risk of condensationHumidity probe for trace humidity / dewpoint (with selfadjustment)Humidity probe with self-monitoring for sensor-damaging media
Humidity
Measuring range***0 to 100 %RHsee trace humidity0 to 100 %RH
Measurement uncertainty* (+25 °C)**testo 6611/12/13: ±(1.0 + 0.007 * mv) %RH for 0 to 100 %RH / ±(1.4 + 0.007 * mv) %RH for 90 to 100 %RH; testo 6614: ±(1.0+ 0.007 * mv) %RH for 0 to 100 %RH; testo 6617: ±(1.2 + 0.007 * mv) %RH for 0 to 90 %RH / ±(1.6 + 0007 * mv) %RH for 90 to 100 %RH +0.02 %RH per Kelvin dependent on the process and electronics temperature (for a deviation of 25 °C / 77 °F)
Selectable units%RH; °Ctd/°Ftd; g/m3 / gr/ft3; g/kg / gr/lb; kj/kg; BTU/lb; °Ctw/°Ftw; hPa; inch H2O2; ppm vol %; %vol; °Ctm (H2O2)/ °Ftm (H2O2)
Reproduceabilitybetter than ±0.2 %RH
SensorTesto capacitive humidity sensor, plug-inTesto capacitive humidity sensor; soldered
Response timet90 max. 10 sec.
Temperature
Selectable units°C/°F
Measuring range-20 to +70 °C/ -4 to +158 °F-30 to +150 °C/ -22 to +248 °F-40 to +180 °C/-40 to +356 °F-40 to +120 °C/ -40 to +248 °F-40 to +180 °C/- 40 to +356 °F
Measurement uncertainty* (at +25 °C / +77 °F)±0.15 °C / 0.27 °F (Pt1000 Class AA)Pt100 Class AAPt1000 Class AA
Trace humidity
Trace humidity-60 to +30 °Ctd/ -76 to +86 °Ftd
Measurement uncertainty-±1 K at 0° Ctd ±2 K at -40° Ctd ±4 K at -50° Ctd-
Probe shaftStainless steel
CableFEP coated
PlugPlastic ABS
Probe dimensions (diameter)12 mm
Probe dimensions (probe shaft length)70/200 mm200/300/500/800 mm120/200/300/500/ 800 mm200/500 mm
Cable length-specially for duct versions1/2/5/10 m
Pressure tightness1 bar positive pressure (probe tip)PN 10 (probe tip) PN 1 (probe tipPN 16 (probe tip)1 bar positive pressure (probe tip)
* Other accuracies apply for wall probe length 70 mm combined with a current output (P07): Operation: 2 channels at 12 mA, without display illumination, relay off, additional measurement error to above values at +25 °C (+77°F), humidity ± 2.5 % RH
**The determination of measurement uncertainty takes place according to GUM (Guide to the Expression of Uncertainty in Measurement): For the determination of measurement uncertainty, the accuracy of the measuring instrument (hysteresis, linearity, reproduceability), the uncertainty contribution of the test site as well as the uncertainty of the adjustment site (works calibration) are taken into account. For this purpose, the value of k=2 of the extension factor, which is usual in measurement technology is used as a basis, which corresponds to a trust level of 95%.
***For continuous applications in high humidity (>80 %RH at ≤30 °C for >12 h, >60 %RH at > 30 °C for >12h), please contact us via www.testo. com. testo 6614 is suitable for high humidity applications.
Product Details
Subject to the use of all the optional accessories.
Humidity
Selectable unitsDependent on probe, available are:relative humidity %RH; normed atm. dewpoint in°CtdA (°Ftd); dewpoint in °Ctd (°Ftd); absolutehumidity in g/m³ (gr/ft³); degree of humidity ing/kg (gr/lb); enthalpy in kj/kg (BTU/lb);psychrometer temperature in °Ctw (°Ftw); watervapour partial pressure in hPa/H20; watercontent in ppmV; mixture dewpoint H2O2 in°Ctm/°Ftm; %RH acc. to WMO; temperature in°C/°F
Measuring range0 to 100 %RH
Trace humidity
Selectable unitsTemperature in °C/°F
Measuring range-60 to +30 °Ctd / -76 to +86 °Ftd (only with testo 6610 L15)
Analog outputs
Quantity2, optionally 3 channels (channel freely selectable)
Output type0/4 to 20 mA (2-wire/4-wire) 0 to 1/5/10 V (4-wire)
Measuring rate1/s
Galvanic isolationGalvanic isolation of the output signals (2-wire and 4-wire), isolation of supply from outputs (4-wire)
Resolution12 bit
Accuracy of the analogoutputs0/4 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
Max. load500 Ω at 24 VAC/DC
Further outputs
EthernetOptional: module can be fitted asintermediary layer
RelaysOptional: 4 relays (free allocation tomeasurement channels or as collective alarmwith operating menu/P2A software), up to 250VDC /3 A (NO/NC)
Other outputsMini DIN for Testo P2A software
Power
Voltage supply2-wire: 24 VDC ±10 %,4-wire: 20 to 30 VAC/DC
Current consumptionmax. 300 mA
General technical dataDesign
MaterialMetal
Dimensions4.8 x 6.37 x 3.03 in (without probe)
Weight3.3 lb (without probe, withoutProfibus/Ethernet module)
Display
DisplayOptional: 2-line LCD with clear text line andrelay status display
Resolution0.1 %RH / °Ctd / °Ftd / °Ctw / °Ftwor 0.01 °C/°F 1g / kg / g/m³ / ppm
Operation
Parameterization4 operating buttons for display / P2A software
Installation
Probe connectionDigital plug connection
Miscellaneous
Protection classIP65
EMC2004/108/EG
Operating conditions
Operating temperature(with integrated relay)-40 to +60 °C
Without displayOperating temperature-40 to +70 °C / -40 to +158 °F
Storage temperature-40 to +80 °C / -40 to +176 °F
With displayOperating temperature0 to +50 °C / +32 to +122 °F
Storage temperature-40 to +80 °C / -40 to +176 °F
Probes
Type6611Wall6612Cable6613Cable6614Heated cable6615Cable trace humidity (selfadjustment)6617Cable with cover electrode monitoring
Operating rangeRoom climate probe wall mountingProcess humidity probe duct mountingProcess humidity probe flexible with cableHumidity probe for high humidity applications / when risk of condensationHumidity probe for trace humidity / dewpoint (with selfadjustment)Humidity probe with self-monitoring for sensor-damaging media
Humidity
Measuring range***0 to 100 %RHsee trace humidity0 to 100 %RH
Measurement uncertainty* (+25 °C)**testo 6611/12/13: ±(1.0 + 0.007 * mv) %RH for 0 to 100 %RH / ±(1.4 + 0.007 * mv) %RH for 90 to 100 %RH; testo 6614: ±(1.0+ 0.007 * mv) %RH for 0 to 100 %RH; testo 6617: ±(1.2 + 0.007 * mv) %RH for 0 to 90 %RH / ±(1.6 + 0007 * mv) %RH for 90 to 100 %RH +0.02 %RH per Kelvin dependent on the process and electronics temperature (for a deviation of 25 °C / 77 °F)
Selectable units%RH; °Ctd/°Ftd; g/m3 / gr/ft3; g/kg / gr/lb; kj/kg; BTU/lb; °Ctw/°Ftw; hPa; inch H2O2; ppm vol %; %vol; °Ctm (H2O2)/ °Ftm (H2O2)
Reproduceabilitybetter than ±0.2 %RH
SensorTesto capacitive humidity sensor, plug-inTesto capacitive humidity sensor; soldered
Response timet90 max. 10 sec.
Temperature
Selectable units°C/°F
Measuring range-20 to +70 °C/ -4 to +158 °F-30 to +150 °C/ -22 to +248 °F-40 to +180 °C/-40 to +356 °F-40 to +120 °C/ -40 to +248 °F-40 to +180 °C/- 40 to +356 °F
Measurement uncertainty* (at +25 °C / +77 °F)±0.15 °C / 0.27 °F (Pt1000 Class AA)Pt100 Class AAPt1000 Class AA
Trace humidity
Trace humidity-60 to +30 °Ctd/ -76 to +86 °Ftd
Measurement uncertainty-±1 K at 0° Ctd ±2 K at -40° Ctd ±4 K at -50° Ctd-
Probe shaftStainless steel
CableFEP coated
PlugPlastic ABS
Probe dimensions (diameter)12 mm
Probe dimensions (probe shaft length)70/200 mm200/300/500/800 mm120/200/300/500/ 800 mm200/500 mm
Cable length-specially for duct versions1/2/5/10 m
Pressure tightness1 bar positive pressure (probe tip)PN 10 (probe tip) PN 1 (probe tipPN 16 (probe tip)1 bar positive pressure (probe tip)
* Other accuracies apply for wall probe length 70 mm combined with a current output (P07): Operation: 2 channels at 12 mA, without display illumination, relay off, additional measurement error to above values at +25 °C (+77°F), humidity ± 2.5 % RH
**The determination of measurement uncertainty takes place according to GUM (Guide to the Expression of Uncertainty in Measurement): For the determination of measurement uncertainty, the accuracy of the measuring instrument (hysteresis, linearity, reproduceability), the uncertainty contribution of the test site as well as the uncertainty of the adjustment site (works calibration) are taken into account. For this purpose, the value of k=2 of the extension factor, which is usual in measurement technology is used as a basis, which corresponds to a trust level of 95%.
***For continuous applications in high humidity (>80 %RH at ≤30 °C for >12 h, >60 %RH at > 30 °C for >12h), please contact us via www.testo. com. testo 6614 is suitable for high humidity applications.
Note

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Reviews

Reviews

Heavy Duty Depot
+1 (838) 222-2023
+1 (718) 504-5719 (Intl.)