The Fluke Calibration 5611T Reference Thermistor Probe is a high accuracy temperature sensor designed for demanding temperature calibration, laboratory measurements and precision temperature monitoring. Featuring a flexible PTFE coated construction, excellent temperature sensitivity and outstanding measurement stability, the Fluke Calibration 5611T provides reliable reference measurements for professional temperature metrology applications.
As part of the Fluke Calibration Secondary Reference Thermistor Probe series, the 5611T combines a compact sensing element with advanced thermistor technology. Its temperature range from 0 °C to 100 °C makes it particularly suitable for calibration laboratories, research facilities and industrial applications requiring accurate temperature measurements.
The Fluke Calibration 5611T offers a calibrated accuracy of ±0.01 °C, repeatability better than ±0.005 °C and annual drift better than ±0.01 °C under specified conditions.
Unlike conventional platinum resistance thermometers, the 5611T uses a negative temperature coefficient thermistor that provides high sensitivity to small temperature changes.
At europascal, customers benefit from professional expertise in temperature calibration, reference thermometers and precision measurement technology.
Features and Benefits of the Fluke Calibration 5611T
The Fluke Calibration 5611T combines excellent measurement accuracy with a flexible and compact sensor design.
Its PTFE coated construction makes it suitable for specialized temperature measurement applications where conventional metal sheathed probes may be less practical.
Key features and benefits include:
- High accuracy reference thermistor probe
- Temperature measurement range from 0 °C to 100 °C
- Calibrated accuracy of ±0.01 °C
- Repeatability better than ±0.005 °C
- Annual drift better than ±0.01 °C
- Nominal resistance of 10,000 Ω at 25 °C
- Flexible PTFE coated sensor construction
- Compact sensing tip with 3.2 mm diameter
- Sensor tip length of approximately 28 mm
- Cable length of approximately 6.1 m
- Fast response to temperature changes
- High temperature sensitivity
- Low self heating with suitable measurement currents
- NIST traceable calibration included
- Optional accredited calibration available
- Multiple connector configurations
- Compatible with selected Fluke Calibration precision thermometers
The Fluke Calibration 5611T is particularly useful for laboratories requiring a reliable temperature reference with excellent sensitivity and repeatability.
Its flexible construction allows the sensing element to be positioned in applications where rigid temperature probes may be difficult to install.
High Accuracy Temperature Measurement
The Fluke Calibration 5611T Reference Thermistor Probe is designed for precision temperature measurements over the range from 0 °C to 100 °C.
The sensor provides calibrated accuracy of ±0.01 °C when evaluated using its individual calibration data.
This level of accuracy makes the 5611T suitable for demanding temperature calibration applications.
The thermistor has a nominal resistance of 10,000 Ω at 25 °C.
As the temperature increases, the electrical resistance decreases.
This behavior is characteristic of a negative temperature coefficient thermistor.
The relatively large resistance change per degree Celsius enables high resolution measurements when the sensor is connected to a suitable precision thermometer.
The Fluke Calibration 5611T is particularly effective for applications where small temperature differences must be detected and evaluated.
Advanced Thermistor Technology
The Fluke Calibration 5611T uses a precision NTC thermistor sensing element.
Thermistors are temperature dependent resistors that provide high sensitivity within a defined temperature range.
Compared with conventional platinum resistance thermometers, thermistors generally offer larger relative resistance changes for small temperature variations.
This enables excellent temperature resolution with suitable measurement electronics.
High Temperature Sensitivity
The Fluke Calibration 5611T provides a large resistance change in response to small temperature variations.
This allows compatible precision thermometers to resolve very small temperature differences.
Excellent Repeatability
With repeatability better than ±0.005 °C, the 5611T is suitable for repeated precision temperature measurements.
This is particularly important in calibration laboratories where consistent reference values are required.
Low Annual Drift
The sensor offers annual drift better than ±0.01 °C under the manufacturer’s specified conditions.
This supports reliable long term temperature measurement performance.
Fast Response Time
The compact sensing element has relatively low thermal mass.
As a result, the Fluke Calibration 5611T responds quickly to temperature changes, reducing measurement time during calibration procedures.
Reduced Immersion Requirements
The small sensor dimensions can help reduce stem conduction errors compared with larger temperature probes.
The actual required immersion depth depends on the measurement medium, temperature difference and installation conditions.
Flexible PTFE Coated Sensor Design
One of the main advantages of the Fluke Calibration 5611T is its flexible PTFE coated construction.
The probe features a sensing tip with a diameter of approximately 3.2 mm and a length of approximately 28 mm.
The flexible construction allows the probe to be positioned in locations that may be difficult to access using conventional rigid temperature sensors.
PTFE is widely used in laboratory and industrial applications because of its chemical resistance and electrical insulation properties.
However, the suitability of the probe for a particular measurement medium must always be evaluated according to the manufacturer’s operating instructions.
The 5611T is especially useful for specialized laboratory temperature measurements and applications requiring a compact reference sensor.
Its approximately 6.1 m long cable provides additional flexibility when connecting the sensor to a precision thermometer.
Compatibility with Precision Thermometers
The Fluke Calibration 5611T Reference Thermistor Probe can be combined with compatible Fluke Calibration precision thermometer readouts.
Suitable instruments include:
Fluke Calibration 1504 Tweener
A precision thermistor thermometer designed for accurate resistance and temperature measurement.
Fluke Calibration 1523 Reference Thermometer
A portable reference thermometer suitable for laboratory and field temperature calibration.
Fluke Calibration 1524 Reference Thermometer
A dual channel reference thermometer designed for precise temperature measurement and comparison applications.
Fluke Calibration 1529 Chub E4
A precision thermometer supporting multiple temperature measurement channels.
Fluke Calibration 1560 Black Stack
A modular precision thermometer system designed for demanding laboratory applications.
Fluke Calibration 1590 Super Thermometer
A high accuracy thermometer suitable for advanced temperature metrology applications.
The correct connector configuration must be selected when ordering the Fluke Calibration 5611T.
Technical Specifications of the Fluke Calibration 5611T
The Fluke Calibration 5611T provides the following technical characteristics.
| Parameter | Specification |
|---|---|
| Manufacturer | Fluke Calibration |
| Model | 5611T |
| Product family | Secondary Reference Thermistor Probes |
| Instrument type | Reference Thermistor Probe |
| Sensor technology | NTC thermistor |
| Temperature range | 0 °C to 100 °C |
| Nominal resistance | 10,000 Ω at 25 °C |
| Calibrated accuracy | ±0.01 °C |
| Optional accredited calibration uncertainty | ±0.006 °C |
| Annual drift | Better than ±0.01 °C |
| Repeatability | Better than ±0.005 °C |
| Sensor tip diameter | 3.2 mm |
| Sensor tip length | 28 mm |
| Sensor construction | PTFE coated |
| Cable length | Approximately 6.1 m |
| Calibration data | Resistance versus temperature table |
| Calibration table increments | 0.1 °C |
| Interpolation | Equation supplied |
| Calibration | NIST traceable |
| Connector | Various termination options |
| Typical applications | Precision temperature calibration |
The stated accuracy and stability specifications apply under the manufacturer’s specified conditions.
The overall measurement uncertainty also depends on the connected thermometer, calibration data and measurement conditions.
Ideal for Demanding Temperature Calibration Applications
The Fluke Calibration 5611T is designed for professional temperature measurement applications requiring excellent accuracy and repeatability.
Calibration Laboratories
The sensor can be used as a reference thermometer probe for calibrating temperature measurement instruments.
Its excellent measurement performance makes it suitable for professional calibration procedures.
Temperature Calibration Baths
The compact sensing element is suitable for reference measurements in compatible temperature calibration baths.
When connected to a precision thermometer, the 5611T provides accurate reference temperature measurements.
Laboratory Temperature Monitoring
The sensor can be used to monitor temperature in laboratory equipment requiring high measurement accuracy.
Research and Development
Research laboratories benefit from the high sensitivity and fast response of the thermistor sensing element.
Industrial Temperature Calibration
The Fluke Calibration 5611T can be used for precise verification of temperature measurement systems within its specified operating range.
Reference Temperature Measurement
The sensor provides a stable reference when used with a compatible calibrated precision thermometer.
Advantages of the Fluke Calibration 5611T
Excellent Measurement Accuracy
The calibrated accuracy of ±0.01 °C makes the 5611T suitable for demanding temperature calibration applications.
High Temperature Resolution
The NTC thermistor provides excellent sensitivity to small temperature changes.
Flexible Sensor Construction
The PTFE coated design allows measurements in locations where rigid temperature probes may be difficult to position.
Fast Response
The compact sensing element responds quickly to temperature changes.
Reliable Long Term Stability
Low annual drift and excellent repeatability support consistent reference measurements.
Traceable Calibration
The included calibration information provides a documented basis for accurate temperature measurements.
Fluke Calibration 5611T Calibration and Service at europascal
Professional calibration is essential for maintaining confidence in precision temperature measurements.
europascal provides calibration solutions, reference temperature measurement equipment and technical expertise for industrial and laboratory applications.
Regular calibration of the Fluke Calibration 5611T helps identify changes in the resistance versus temperature characteristics of the sensor.
These changes can influence the accuracy of temperature measurements and should be considered when evaluating measurement uncertainty.
For demanding applications, calibration of the complete measurement system, including the reference thermistor and connected thermometer readout, may be beneficial.
Discover our professional europascal calibration service for reliable and traceable calibration of your temperature measurement equipment.
europascal supports customers in selecting suitable reference thermometers and calibration solutions according to their individual measurement requirements.
Why Choose the Fluke Calibration 5611T?
The Fluke Calibration 5611T Precision Reference Thermistor Probe combines high temperature sensitivity, excellent measurement accuracy and flexible PTFE coated construction.
Its calibrated accuracy of ±0.01 °C, repeatability better than ±0.005 °C and low annual drift make it an excellent choice for professional temperature calibration.
The compact sensing element provides fast response and allows measurements in applications where conventional rigid temperature probes may be less suitable.
Compatibility with selected Fluke Calibration precision thermometer readouts enables flexible integration into laboratory and field calibration systems.
For organizations requiring accurate reference temperature measurements between 0 °C and 100 °C, the Fluke Calibration 5611T provides a reliable and practical solution.
Looking for the Fluke Calibration 5611T or a professional temperature calibration solution? Contact europascal today for expert advice, product availability, pricing and calibration options tailored to your requirements.
You can find more products from Fluke Calibration here.
Discover our professional europascal calibration service for reliable and traceable calibration of your temperature measurement equipment.
For manufacturer information about the Fluke Calibration 5611T, visit the official Fluke Calibration website.
