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Testo 0555 6651 6651 Temperature and Humidity Transmitter

  • Brand Testo
  • Part # 0555 6651
  • Model # 6651
  • Condition
    Brand New

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0555 6651, Humidity transmitter for critical climate applications

Note: Please keep in mind that you need an attachable probe to commission the transmitter.

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 the humidity parameters relative humidity absolute humidity and dewpoint.
  • P2A software for parameterization, adjustment and analysis saves time and costs in commissioning and maintenance
  • Display with multi-language display
  • High-quality plastic housing
  • High-precision Testo humidity sensors with long-term stability (±1.7 % RH) can be ordered for the transmitter

In combination with the testo 660x probe series, the testo 6651 temperature/humidity transmitter meets high demands. It is not possible to solve every measuring problem in air conditioning technology with “simple" temperature/humidity transmitters. We recommend you get the testo 6651 transmitter for special challenges. Combining it with the testo 660x probe series makes it the first choice when it comes to measurement in rooms and also ducts.

Applications:

  • Monitoring of comfortable climate conditions
  • Museums
  • Storing hygroscopic substances
  • Storing electronic components
  • Stationary measurement of production climate conditions:
  • Drying processes/high-humidity processes
  • Food: processing cheese, ripening fruit, drying pasta, conditioning chambers for cold meats
  • Bio research
  • Mushroom cultivation
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We aim to show you accurate product information. Here you will find what the manufacturers have provided us with. See our disclaimer.

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Technical Details

Reviews
Subject to the use of all the optional accessories.
Humidity
UnitsRelative humidity %RH , °Ctd, °Ftd, g/m³
Meas. range0 to 100 %RH
Temperature
UnitsTemperature in °C / °F
Meas. rangeDependent on probe (testo 660x)
Analog outputs
Quantity2 channels
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 analog outputs0/4 to 20 mA / ±0.03 mA0 to 1 V / ±1.5 mV0 to 5 V / ±7.5 mV0 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 parameterization software
Power
Voltage supply2-wire: 24 VDC ±10 %4-wire: 20 to 30 VAC/DC
Current consumptionmax. 300 mA
General technical data Design
MaterialPlastic
Dimensions122 x 162 x 77 mm (without probe)
Weight0.675 kg (without probe, without Ethernet module)
Display
DisplayOptional: 2-line LCD with clear text line andrelay status display
Resolution0.1 %RH / 0.01 °C/°F / 0.1 °Ctd/°Ftd/ 1 g/m3
Operation
ParameterizationFour operating buttons for display /P2A software
Installation
Cable screw fittingStandard: PG screw fittingOptional: M16 or M20 M plug connection oroptional: NPT 1/2 plug connection
Probe connectionDigital plug connection
Other features
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
Measurement mediumAir, nitrogen
 
Probes
Type6601 Wall6602 Duct6603 Duct6604 Cable6605 Cable
Operating rangeRoom climate probe wall mountingClimate probe duct mountingProcess climate probe duct mounting for higher process temperaturesClimate probe with cableStainless steel process probe with cable for higher process temperatures
Humidity
Measuring range***0 to 100 %RH
Measurement uncertainty* (+25 °C)**±(1.7 + 0.007 * mv) %RH (0 to 90 %RH) / ±(1.9 + 0.007 * mv) %RH (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
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
Sensor-20 to +70 °C/ -4 to +158 °F-30 ... +120 °C/ -22 ... +248 °F-20 ... +70°C/ -4 ... +158 °F-30 ... +120 °C/ -22 ... +248 °F
Measurement uncertainty* (at +25 °C / +77 °F)±0.15 °C / 0.27 °F (Pt1000 Class AA)Pt100 Class AA
Probe shaftPlastic ABSStainless steel
CableFEP coated
PlugPlastic ABS
Probe dimensions (diameter)12 mm
Probe dimensions (probe shaft length)70/200 mm280 mm140/280 mm200/500 mm
Cable length-specially for duct versions1 / 2 m1 / 2 / 5 m
Pressure tightnesswithout1 bar positive pressure (probe tip)PN 16 (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.
Product Details
Subject to the use of all the optional accessories.
Humidity
UnitsRelative humidity %RH , °Ctd, °Ftd, g/m³
Meas. range0 to 100 %RH
Temperature
UnitsTemperature in °C / °F
Meas. rangeDependent on probe (testo 660x)
Analog outputs
Quantity2 channels
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 analog outputs0/4 to 20 mA / ±0.03 mA0 to 1 V / ±1.5 mV0 to 5 V / ±7.5 mV0 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 parameterization software
Power
Voltage supply2-wire: 24 VDC ±10 %4-wire: 20 to 30 VAC/DC
Current consumptionmax. 300 mA
General technical data Design
MaterialPlastic
Dimensions122 x 162 x 77 mm (without probe)
Weight0.675 kg (without probe, without Ethernet module)
Display
DisplayOptional: 2-line LCD with clear text line andrelay status display
Resolution0.1 %RH / 0.01 °C/°F / 0.1 °Ctd/°Ftd/ 1 g/m3
Operation
ParameterizationFour operating buttons for display /P2A software
Installation
Cable screw fittingStandard: PG screw fittingOptional: M16 or M20 M plug connection oroptional: NPT 1/2 plug connection
Probe connectionDigital plug connection
Other features
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
Measurement mediumAir, nitrogen
 
Probes
Type6601 Wall6602 Duct6603 Duct6604 Cable6605 Cable
Operating rangeRoom climate probe wall mountingClimate probe duct mountingProcess climate probe duct mounting for higher process temperaturesClimate probe with cableStainless steel process probe with cable for higher process temperatures
Humidity
Measuring range***0 to 100 %RH
Measurement uncertainty* (+25 °C)**±(1.7 + 0.007 * mv) %RH (0 to 90 %RH) / ±(1.9 + 0.007 * mv) %RH (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
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
Sensor-20 to +70 °C/ -4 to +158 °F-30 ... +120 °C/ -22 ... +248 °F-20 ... +70°C/ -4 ... +158 °F-30 ... +120 °C/ -22 ... +248 °F
Measurement uncertainty* (at +25 °C / +77 °F)±0.15 °C / 0.27 °F (Pt1000 Class AA)Pt100 Class AA
Probe shaftPlastic ABSStainless steel
CableFEP coated
PlugPlastic ABS
Probe dimensions (diameter)12 mm
Probe dimensions (probe shaft length)70/200 mm280 mm140/280 mm200/500 mm
Cable length-specially for duct versions1 / 2 m1 / 2 / 5 m
Pressure tightnesswithout1 bar positive pressure (probe tip)PN 16 (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.
Note

Note: Please read description carefully. Do not base your order on the picture presented.

Reviews

Reviews

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