The Fluke Calibration 5622 is a high-precision, fast-response platinum resistance thermometer (PRT) designed for accurate temperature measurements in calibration laboratories, industrial applications and temperature metrology.
With a wide temperature range from −200 °C to +350 °C, exceptionally small probe diameters and response times as fast as 0.4 seconds, the Fluke Calibration 5622 provides an excellent solution for applications requiring rapid temperature measurements and minimal immersion depth.
The Fluke Calibration 5622 series consists of four different probe models with diameters ranging from 0.5 mm to 3.2 mm.
These compact probes are particularly suitable for temperature measurements in confined spaces, small calibration openings and applications where conventional reference thermometers cannot be immersed sufficiently.
The precision platinum resistance sensing elements provide excellent measurement stability and repeatability.
Depending on the selected version, the minimum immersion depth ranges from only 10 mm to 64 mm.
The Fluke Calibration 5622 combines the advantages of platinum resistance thermometry with the fast thermal response typically associated with smaller temperature sensors.
The probes can be used with suitable precision thermometer readouts, including the Fluke Calibration 1523, 1524 and 1529.
An individual ITS-90 comparison calibration is available, allowing the sensor to be characterized for high-accuracy reference temperature measurements.
At europascal, the Fluke Calibration 5622 offers a professional solution for precision temperature measurement, temperature comparison calibration and demanding industrial applications.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Fast-response platinum resistance thermometer
- Temperature range from −200 °C to +350 °C
- Response times as fast as 0.4 seconds
- Four different probe diameters
- Diameters from 0.5 mm to 3.2 mm
- Minimum immersion depths from 10 mm to 64 mm
- Precision platinum resistance sensing elements
- Nominal resistance of 100 Ω
- Nominal temperature coefficient of 0.00385 Ω/Ω/°C
- Four-wire resistance measurement
- Stainless steel 316 probe sheath
- Excellent measurement repeatability
- Suitable for temperature comparison calibration
- Suitable for temperature measurements in confined spaces
- Suitable for small measurement volumes
- Suitable for dynamic temperature measurements
- Individual ITS-90 calibration available
- Optional accredited calibration
- Different connector configurations available
- Compatible with precision thermometer readouts
- Professional calibration support from europascal
Precision Temperature Measurement from −200 °C to +350 °C
The Fluke Calibration 5622 is designed for accurate temperature measurements over a wide temperature range.
Temperature range: −200 °C to +350 °C
This range covers cryogenic temperature measurements, low-temperature calibration, ambient temperature measurements and elevated-temperature industrial applications.
The Fluke Calibration 5622 is particularly suitable for applications requiring fast thermal response.
Its small sensing elements allow rapid temperature measurements while maintaining the advantages of platinum resistance thermometry.
The wide operating range makes the Fluke Calibration 5622 more versatile than many conventional thermistor probes.
Fast Thermal Response
One of the most important advantages of the Fluke Calibration 5622 is its exceptionally fast response to temperature changes.
The manufacturer specifies response times as fast as:
0.4 seconds
This performance is achieved through the compact construction and small thermal mass of the sensing element.
The small probe diameter allows heat to be transferred quickly between the measurement medium and the platinum resistance element.
This is particularly useful when measuring rapidly changing temperatures.
The actual response time depends on the selected probe model and the measurement conditions.
Four Different Probe Diameters
The Fluke Calibration 5622 series includes four different probe models.
Each model is designed for specific measurement requirements.
Fluke Calibration 5622-05
Probe diameter: 0.5 mm
Probe length: 100 mm
Minimum immersion depth: 10 mm
Time constant: 0.4 seconds
The Fluke Calibration 5622-05 is the smallest and fastest probe in the series.
Its extremely small diameter makes it particularly suitable for temperature measurements in narrow openings and confined spaces.
Fluke Calibration 5622-10
Probe diameter: 1.0 mm
Probe length: 100 mm
Minimum immersion depth: 20 mm
Time constant: 1.5 seconds
The Fluke Calibration 5622-10 combines fast response with a slightly larger probe diameter.
It is suitable for applications requiring rapid temperature measurements and relatively shallow immersion.
Fluke Calibration 5622-16
Probe diameter: 1.6 mm
Probe length: 200 mm
Minimum immersion depth: 32 mm
Time constant: 3.0 seconds
The Fluke Calibration 5622-16 provides a balance between mechanical robustness and thermal response.
Its longer sheath allows use in a wider range of calibration equipment.
Fluke Calibration 5622-32
Probe diameter: 3.2 mm
Probe length: 200 mm
Minimum immersion depth: 64 mm
Response time: 10 seconds at 90% response
The Fluke Calibration 5622-32 is the most robust version in the series.
Its larger diameter provides greater mechanical strength while maintaining good thermal response.
Small Immersion Depth
The Fluke Calibration 5622 is particularly suitable for applications where only limited immersion depth is available.
Depending on the selected version, the minimum immersion depth ranges from:
10 mm to 64 mm
This is significantly less than the immersion depth required by many conventional reference thermometers.
A short immersion depth allows accurate temperature measurements in small containers and confined measurement locations.
The compact sensing element helps reduce the influence of heat conduction along the probe stem.
However, immersion effects should still be evaluated when performing high-accuracy calibration.
Precision Platinum Resistance Element
The Fluke Calibration 5622 uses a precision platinum resistance sensing element.
Platinum is widely used in temperature metrology because its electrical resistance changes reproducibly with temperature.
The Fluke Calibration 5622 features a nominal resistance of:
100 Ω
The nominal temperature coefficient is:
0.00385 Ω/Ω/°C
This corresponds to the standard industrial platinum resistance characteristic.
The sensor resistance is measured using a suitable precision thermometer readout.
The readout converts the measured resistance into temperature using the selected calibration characteristic.
Four-Wire Resistance Measurement
The Fluke Calibration 5622 uses a four-wire electrical connection.
Four-wire measurement minimizes errors caused by connecting lead resistance.
In a two-wire connection, the resistance of the connecting leads contributes to the measured resistance.
This can introduce temperature measurement errors.
Four-wire measurement separates the current and voltage connections.
This allows the resistance of the platinum sensing element to be determined more accurately.
Stainless Steel 316 Sheath
The Fluke Calibration 5622 features a stainless steel 316 sheath.
This material provides mechanical protection and corrosion resistance for many laboratory and industrial applications.
The sheath protects the precision platinum sensing element.
Its small diameter allows fast heat transfer between the measurement medium and the sensor.
Chemical compatibility should be considered when the probe is exposed to aggressive measurement media.
Calibrated Probe Accuracy
The Fluke Calibration 5622 provides excellent calibrated measurement accuracy.
The manufacturer specifies different accuracy values depending on the selected probe diameter.
Fluke Calibration 5622-05 and 5622-10
| Temperature | Calibrated Accuracy |
|---|---|
| −200 °C | ±0.04 °C |
| 0 °C | ±0.04 °C |
| +200 °C | ±0.09 °C |
| +300 °C | ±0.09 °C |
Fluke Calibration 5622-16 and 5622-32
| Temperature | Calibrated Accuracy |
|---|---|
| −200 °C | ±0.04 °C |
| 0 °C | ±0.04 °C |
| +200 °C | ±0.045 °C |
| +300 °C | ±0.055 °C |
These specifications include calibration uncertainty and short-term stability.
The total measurement uncertainty also depends on the connected thermometer readout and measurement conditions.
ITS-90 Comparison Calibration
The Fluke Calibration 5622 can be supplied with an individual ITS-90 comparison calibration.
The manufacturer offers calibration services covering seven temperature points from approximately:
−197 °C to +300 °C
The calibration provides individual coefficients for accurate temperature conversion.
These coefficients describe the resistance-temperature relationship of the specific probe.
When entered into a compatible thermometer readout, the individual calibration coefficients allow more accurate temperature measurements than a generic nominal sensor characteristic.
Optional Accredited Calibration
An accredited comparison calibration is available for the Fluke Calibration 5622.
The calibration provides documented measurement results and supports metrological traceability.
The selected calibration option should be checked when ordering.
For high-accuracy applications, the uncertainty stated on the individual calibration certificate should be considered.
Compatible Thermometer Readouts
The Fluke Calibration 5622 is a passive platinum resistance thermometer.
It does not include an integrated temperature display.
A suitable precision thermometer readout is required.
Compatible instruments include:
- Fluke Calibration 1523
- Fluke Calibration 1524
- Fluke Calibration 1529
- Other compatible precision resistance thermometer readouts
The selected connector must match the thermometer readout.
Intelligent Sensor Connectors
The Fluke Calibration 5622 is available with different connector options.
Compatible INFO-CON connectors can store individual calibration coefficients.
When connected to a suitable Fluke Calibration thermometer readout, the coefficients can be retrieved automatically.
This simplifies instrument configuration and reduces the risk of incorrect calibration data entry.
The availability of this function depends on the selected connector and thermometer readout.
Available Connector Configurations
The Fluke Calibration 5622 is available with different connector configurations.
| Connector Code | Connection Type |
|---|---|
| A | INFO-CON for Fluke 914X |
| B | Bare wire |
| D | 5-pin DIN |
| G | Gold pins |
| J | Banana plugs |
| L | Mini spade lugs |
| M | Mini banana plugs |
| P | INFO-CON for Fluke 1523/1524 |
| S | Spade lugs |
The appropriate connector should be selected according to the thermometer readout.
Temperature Comparison Calibration
The Fluke Calibration 5622 is particularly suitable for temperature comparison calibration.
A calibrated reference thermometer and a device under test are placed in the same stable temperature source.
After thermal equilibrium has been reached, both temperature values are recorded.
The indication error is calculated as:
ΔT = T_DUT − T_REF
Where:
- ΔT = Temperature indication error
- T_DUT = Temperature indicated by the device under test
- T_REF = Reference temperature
The measurement uncertainty depends on the reference thermometer calibration, readout accuracy and temperature source.
Temperature Measurements in Confined Spaces
The small probe diameters of the Fluke Calibration 5622 allow temperature measurements in confined spaces.
The smallest version has a diameter of only 0.5 mm.
This allows the probe to be inserted into narrow measurement openings.
The compact construction also reduces the thermal disturbance caused by the sensor.
This is particularly useful when measuring temperatures in small volumes.
Dynamic Temperature Measurements
The Fluke Calibration 5622 is suitable for applications involving changing temperatures.
Its fast response allows temperature variations to be detected quickly.
The 5622-05 version provides a time constant of only 0.4 seconds under the specified test conditions.
This makes it particularly useful for monitoring rapid temperature changes.
The actual dynamic response depends on the measurement medium and installation.
Calibration Baths
The Fluke Calibration 5622 can be used in compatible liquid calibration baths.
The small probe diameter allows the sensor to be positioned in narrow calibration openings.
The short immersion requirements make the probe particularly useful for shallow calibration baths.
For high-accuracy measurements, the temperature stability and uniformity of the bath must be considered.
Dry-Block Temperature Calibration
The Fluke Calibration 5622 can also be used with suitable dry-block temperature calibrators.
The small probe diameter allows measurements in narrow calibration inserts.
The reference thermometer measures the temperature of the calibration zone.
This allows the actual temperature to be compared with the indication of the device under test.
Technical Highlights
| Feature | Fluke Calibration 5622 |
|---|---|
| Product type | Fast-Response Platinum Resistance Thermometer |
| Manufacturer | Fluke Calibration |
| Temperature range | −200 °C to +350 °C |
| Sensor technology | Platinum Resistance Thermometer |
| Nominal resistance | 100 Ω |
| Temperature coefficient | 0.00385 Ω/Ω/°C |
| Probe versions | 5622-05, 5622-10, 5622-16, 5622-32 |
| Probe diameters | 0.5 / 1.0 / 1.6 / 3.2 mm |
| Probe lengths | 100 / 200 mm |
| Minimum immersion depth | 10 / 20 / 32 / 64 mm |
| Fastest time constant | 0.4 seconds |
| Sheath material | Stainless steel 316 |
| Electrical connection | Four-wire |
| Cable length | 2 m |
| Cable material | PVC |
| Maximum cable temperature | 90 °C |
| ITS-90 calibration | Available |
| Accredited calibration | Optional |
| Integrated display | No |
Fluke Calibration 5622 vs. Fluke Calibration 5615
The Fluke Calibration 5622 and 5615 are both precision platinum resistance thermometers.
However, they are designed for different applications.
| Feature | Fluke Calibration 5622 | Fluke Calibration 5615 |
|---|---|---|
| Sensor technology | Platinum Resistance Thermometer | Platinum Resistance Thermometer |
| Temperature range | −200 °C to +350 °C | Up to −200 °C to +420 °C |
| Main advantage | Fast response | High reference accuracy |
| Smallest probe diameter | 0.5 mm | 4.76 mm |
| Minimum immersion depth | From 10 mm | Greater immersion required |
| Accuracy at 0 °C | ±0.04 °C | ±0.012 °C |
| Sheath material | Stainless steel 316 | Inconel 600 |
| Main application | Dynamic temperature measurement | Secondary reference calibration |
The Fluke Calibration 5622 is particularly suitable for applications requiring fast response and small probe diameters.
The Fluke Calibration 5615 is designed for applications requiring higher reference accuracy.
Typical Applications
The Fluke Calibration 5622 is suitable for:
- Fast temperature measurements
- Dynamic temperature measurements
- Temperature comparison calibration
- Temperature calibration laboratories
- Platinum resistance thermometer calibration
- Pt100 calibration
- Small-volume temperature measurements
- Temperature measurements in confined spaces
- Liquid calibration baths
- Dry-block temperature calibrators
- Temperature stability measurements
- Industrial temperature sensor verification
- Research laboratories
- Quality assurance
- Temperature metrology
Calibration by europascal
Regular calibration is essential for maintaining reliable temperature measurement results.
europascal provides professional calibration services for temperature measuring instruments and reference temperature measurement systems.
The Fluke Calibration 5622 can be calibrated to determine its individual resistance-temperature characteristic.
When combined with a suitable precision thermometer readout, the probe forms part of a traceable temperature measurement system.
The complete measurement uncertainty depends on the probe calibration, thermometer readout, sensor stability and measurement conditions.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
europascal also supports customers in selecting suitable temperature probes, thermometer readouts and calibration equipment.
Why Choose the Fluke Calibration 5622?
The Fluke Calibration 5622 combines fast thermal response, compact probe dimensions and the reliability of platinum resistance thermometry.
Its temperature range from −200 °C to +350 °C covers a wide variety of laboratory and industrial applications.
Four different probe diameters allow the thermometer to be adapted to different measurement requirements.
The smallest version has a diameter of only 0.5 mm and a time constant of 0.4 seconds.
The short immersion requirements make the Fluke Calibration 5622 particularly suitable for confined spaces and shallow measurement locations.
The stainless steel 316 sheath provides mechanical protection.
Four-wire resistance measurement minimizes the influence of connecting lead resistance.
Optional accredited calibration and individual ITS-90 coefficients support traceable temperature measurements.
For professional users requiring a fast-response platinum resistance thermometer, the Fluke Calibration 5622 provides an excellent combination of speed, accuracy and versatility.
europascal supports customers with precision temperature probes, temperature calibration equipment and professional calibration services.
