The Fluke Calibration 6109A is a high-precision portable temperature calibration bath designed for demanding temperature sensor calibration in laboratories, pharmaceutical manufacturing, biotechnology, food production and industrial process applications.
With a temperature range from +35 °C to +250 °C, a maximum permissible temperature error of ±0.1 °C and temperature stability of 0.015 °C, the Fluke Calibration 6109A combines excellent metrological performance with a compact, portable design.
The instrument is particularly suitable for calibrating sanitary temperature sensors used in hygienic production environments. Its spacious liquid bath accommodates up to four tri-clamp temperature sensors simultaneously, significantly improving calibration efficiency compared with conventional single-sensor calibration systems.
The Fluke Calibration 6109A features a stainless steel housing, a large color display and an integrated fluid circulation system. Its robust construction makes it suitable for laboratory environments as well as demanding industrial applications.
The bath provides excellent temperature stability and uniformity, supporting reliable comparison calibrations of resistance thermometers, thermocouples, temperature transmitters and industrial temperature sensors.
For professional temperature calibration equipment and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Temperature range from +35 °C to +250 °C
- Maximum permissible temperature error of ±0.1 °C
- Temperature stability of 0.015 °C
- Typical temperature uniformity of 0.03 °C up to 200 °C
- Typical temperature uniformity of 0.04 °C above 200 °C
- Temperature repeatability of 0.04 °C
- Display resolution of 0.01 °C or 0.001 °C
- Calibration of up to four tri-clamp sensors simultaneously
- Large 2.5-liter fluid capacity
- Working area of 75 mm × 75 mm
- Maximum fluid depth of 154 mm
- Compact and portable construction
- Weight of approximately 16 kg
- Stainless steel housing
- Suitable for hygienic production environments
- Large color display
- Clear temperature stabilization indicator
- Hot surface warning indicator
- Integrated overflow protection
- Convenient fluid drainage
- Optional process measurement electronics
- Accredited manufacturer calibration included
- Professional calibration support from europascal
Temperature Range from +35 °C to +250 °C
The Fluke Calibration 6109A provides a temperature calibration range of:
+35 °C to +250 °C
This range covers numerous industrial and laboratory temperature calibration applications.
It is particularly suitable for sensors used in pharmaceutical manufacturing, biotechnology, food processing and chemical production.
The wide temperature range allows calibration at several points throughout the operating range of a temperature sensor.
For example, industrial temperature sensors can be checked at 50 °C, 100 °C, 150 °C, 200 °C and 250 °C.
The specified temperature range applies at an ambient temperature of 25 °C.
The appropriate bath fluid must be selected according to the required temperature range and the manufacturer’s operating instructions.
Maximum Permissible Temperature Error of ±0.1 °C
One of the most important characteristics of the Fluke Calibration 6109A is its excellent temperature performance.
The manufacturer specifies a maximum permissible temperature error of:
±0.1 °C
This specification includes relevant contributions from calibration uncertainty, temperature stability, temperature uniformity and repeatability under the defined operating conditions.
It should not be confused with the temperature stability specification or the uncertainty stated on an individual calibration certificate.
For demanding comparison calibrations, the uncertainty of the complete measurement system must be considered.
This includes the calibration bath, reference thermometer, thermometer readout and device under test.
Excellent Temperature Stability
The Fluke Calibration 6109A provides excellent temperature stability.
The manufacturer specifies:
0.015 °C
Temperature stability describes the variation of the bath temperature over time under specified conditions.
High temperature stability is particularly important when several temperature sensors are calibrated simultaneously.
A stable temperature environment helps ensure that differences between sensors can be evaluated reliably.
For accurate calibration results, sufficient stabilization time should be allowed after changing the temperature setpoint.
Excellent Temperature Uniformity
The Fluke Calibration 6109A provides excellent temperature uniformity throughout its specified working volume.
The manufacturer specifies typical temperature uniformity of:
0.03 °C up to 200 °C
and:
0.04 °C above 200 °C
Temperature uniformity describes the spatial temperature differences within the calibration bath.
Good temperature uniformity is essential when several sensors are calibrated simultaneously.
If different sensors are exposed to different temperatures, additional measurement errors may occur.
The Fluke Calibration 6109A is designed to minimize these temperature differences within its specified working volume.
Calibration of Up to Four Tri-Clamp Sensors
A major advantage of the Fluke Calibration 6109A is its ability to calibrate several sanitary temperature sensors simultaneously.
The bath accommodates up to:
Four tri-clamp temperature sensors
in a single calibration batch.
Tri-clamp temperature sensors are commonly used in hygienic production processes.
Typical applications include:
- Pharmaceutical manufacturing
- Biotechnology
- Food production
- Beverage processing
- Chemical processing
- Hygienic process installations
The ability to calibrate several sensors simultaneously can significantly reduce calibration time and production downtime.
For sensors with smaller connection flanges or without flanges, even more measurement points may be accommodated depending on their dimensions.
Large 2.5-Liter Calibration Bath
The Fluke Calibration 6109A features a liquid bath with a fluid volume of:
2.5 liters
The working area measures:
75 mm × 75 mm
The maximum fluid depth is:
154 mm
This provides sufficient space for many industrial temperature sensors and sanitary probes.
The liquid medium provides good thermal contact between the temperature sensors and the calibration environment.
Compared with dry block calibrators, liquid baths can offer advantages when sensors have unusual geometries or large process connections.
The actual usable measurement volume is defined by the manufacturer’s specifications.
Portable Design
Despite its excellent measurement performance, the Fluke Calibration 6109A is designed for portable operation.
The instrument weighs approximately:
16 kg
Its dimensions are:
- Height: 382 mm
- Width: 242 mm
- Depth: 400 mm
The compact design makes the bath suitable for use in calibration laboratories and industrial facilities.
A fixed carrying handle allows convenient transport between measurement locations.
Additional recessed handles support safe handling when moving the instrument between benches or transport carts.
The bath must be transported according to the manufacturer’s instructions, particularly when filled with calibration fluid.
Stainless Steel Housing
The Fluke Calibration 6109A features a stainless steel housing designed for demanding industrial environments.
The construction is particularly suitable for hygienic production facilities where regular cleaning is required.
The housing is resistant to many cleaning chemicals commonly used in industrial environments.
The sealed keypad provides additional protection against moisture during cleaning.
This makes the Fluke Calibration 6109A suitable for applications in pharmaceutical manufacturing, biotechnology and food processing.
The compatibility of cleaning agents with the instrument materials must nevertheless be verified.
Large Color Display
The Fluke Calibration 6109A features a large color display that provides important measurement information.
The display shows:
- Current bath temperature
- Temperature setpoint
- Date and time
- Temperature control status
- Heating status
- Stabilization indication
The clear display simplifies operation and allows users to monitor the calibration process directly.
This is particularly useful during field calibration and repeated sensor calibration procedures.
Temperature Stabilization Indicator
The Fluke Calibration 6109A provides a convenient temperature stabilization indicator.
The indicator changes from amber to green when the bath reaches the required stabilization condition.
This provides a clear visual indication that the bath is ready for calibration measurements.
The indicator is visible from different directions, allowing technicians to monitor the bath without continuously checking the display.
For demanding reference measurements, the actual stabilization requirements of the calibration procedure must still be observed.
Hot Surface Warning
The Fluke Calibration 6109A includes a hot surface warning indicator.
The warning activates when the bath fluid temperature exceeds:
60 °C
This alerts the operator that the bath fluid and surrounding tank area may be hot.
The warning is particularly important during high-temperature calibration procedures.
Appropriate protective equipment and safe handling procedures must always be used.
Fast Heating Performance
The Fluke Calibration 6109A provides efficient heating performance.
The manufacturer specifies typical heating times of:
| Temperature Change | Typical Heating Time |
|---|---|
| 35 °C to 100 °C | 25 minutes |
| 100 °C to 250 °C | 45 minutes |
These values describe typical heating performance under the manufacturer’s specified operating conditions.
Actual heating times depend on ambient conditions, bath fluid, sensor loading and the selected temperature setpoint.
The relatively short heating times help reduce waiting periods between calibration points.
Cooling Performance
The Fluke Calibration 6109A also provides controlled cooling performance.
Typical cooling times are:
| Temperature Change | Typical Cooling Time |
|---|---|
| 250 °C to 100 °C | 35 minutes |
| 100 °C to 35 °C | 55 minutes |
Cooling times depend on operating conditions and the thermal properties of the calibration fluid.
The instrument provides a practical solution for multi-point calibration procedures involving both increasing and decreasing temperature sequences.
Temperature Settling Time
The manufacturer specifies a typical settling time of:
15 minutes
Settling time describes the time required for the bath to stabilize after reaching a new temperature setpoint.
For demanding temperature calibration, the actual stabilization of the reference thermometer and device under test should also be considered.
The required stabilization time may differ depending on sensor dimensions, immersion depth and thermal response.
Optional Process Measurement Electronics
The Fluke Calibration 6109A is available in two configurations.
Fluke Calibration 6109A
The standard model provides precise temperature generation and control.
It is designed for use with external reference thermometers and measurement instruments.
Fluke Calibration 6109A-P
The 6109A-P includes additional process measurement electronics.
These allow direct connection of compatible reference thermometers and devices under test.
The process electronics provide measurement functions for:
- Reference resistance thermometers
- RTDs
- Thermocouples
- DC current signals
- Temperature transmitters
The process module also provides a 24 V DC loop power supply for compatible transmitters.
These additional measurement functions are available only with the 6109A-P configuration.
Reference Thermometer Measurements
For demanding temperature calibration applications, an external reference thermometer can be used.
The reference thermometer measures the actual temperature of the calibration medium.
This allows the device under test to be compared directly with a traceable temperature reference.
For the standard 6109A, a separate thermometer readout is required.
The 6109A-P provides an integrated reference thermometer input.
The appropriate configuration should be selected according to the required measurement uncertainty and calibration procedure.
Calibration of RTDs and Pt100 Sensors
The Fluke Calibration 6109A is suitable for calibrating resistance temperature detectors.
Typical sensors include:
- Pt100
- Pt1000
- Industrial RTDs
- Precision platinum resistance thermometers
- Sanitary temperature sensors
The sensors are immersed in the temperature-controlled liquid bath and compared with a suitable reference thermometer.
The calibration results can be evaluated according to the required calibration procedure.
For high-accuracy measurements, the uncertainty of the reference thermometer and calibration bath must be considered.
Calibration of Thermocouples
The Fluke Calibration 6109A can also be used for thermocouple calibration.
Thermocouples are immersed in the bath and compared with a suitable reference temperature measurement system.
The liquid bath provides good thermal contact and temperature uniformity.
For thermocouple calibration, reference junction compensation must also be considered.
The 6109A-P provides integrated thermocouple measurement capabilities.
For the standard model, an external thermocouple measurement instrument is required.
Calibration of Temperature Transmitters
Temperature transmitters convert sensor signals into standardized electrical output signals.
A common industrial output signal is:
4 mA to 20 mA
The Fluke Calibration 6109A can provide the controlled temperature environment required for transmitter calibration.
The 6109A-P includes process electronics capable of measuring DC current signals and providing loop power.
This allows compatible temperature transmitters to be checked without requiring a separate current measurement instrument.
Technical Highlights
| Specification | Fluke Calibration 6109A |
|---|---|
| Manufacturer | Fluke Calibration |
| Model | 6109A |
| Product type | Portable Temperature Calibration Bath |
| Temperature range | +35 °C to +250 °C |
| Maximum permissible temperature error | ±0.1 °C |
| Temperature stability | 0.015 °C |
| Typical uniformity up to 200 °C | 0.03 °C |
| Typical uniformity above 200 °C | 0.04 °C |
| Temperature repeatability | 0.04 °C |
| Display resolution | 0.01 °C or 0.001 °C |
| Fluid volume | 2.5 liters |
| Working area | 75 × 75 mm |
| Maximum fluid depth | 154 mm |
| Tri-clamp sensor capacity | Up to 4 |
| Typical settling time | 15 minutes |
| Heating time, 35 °C to 100 °C | 25 minutes |
| Heating time, 100 °C to 250 °C | 45 minutes |
| Cooling time, 250 °C to 100 °C | 35 minutes |
| Cooling time, 100 °C to 35 °C | 55 minutes |
| Display | Color display |
| Housing | Stainless steel |
| Dimensions (H × W × D) | 382 × 242 × 400 mm |
| Weight | Approx. 16 kg |
| Power supply | 100–120 V or 200–230 V AC, 50/60 Hz |
| Rated power | 1150 W |
| Factory calibration | Traceable accredited calibration included |
| Optional process electronics | 6109A-P |
Fluke Calibration 6109A or 7109A?
The Fluke Calibration 6109A and 7109A belong to the same family of portable temperature calibration baths.
Both models provide excellent temperature stability, compact construction and the ability to calibrate multiple sanitary temperature sensors.
The main difference is the available temperature range.
| Specification | 6109A | 7109A |
|---|---|---|
| Temperature range | +35 °C to +250 °C | −25 °C to +140 °C |
| Maximum permissible error | ±0.1 °C | ±0.1 °C |
| Temperature stability | 0.015 °C | 0.01 °C |
| Typical uniformity | 0.03–0.04 °C | 0.02 °C |
| Fluid volume | 2.5 liters | 2.5 liters |
| Weight | 16 kg | 20 kg |
| Optional process electronics | Yes | Yes |
The Fluke Calibration 6109A is particularly suitable for applications requiring temperatures up to 250 °C.
The Fluke Calibration 7109A is designed for applications requiring temperatures below ambient temperature.
The appropriate model should be selected according to the required temperature range and calibration application.
Calibration Service by europascal
Regular calibration is essential for maintaining reliable and traceable temperature measurements.
europascal provides professional calibration services for temperature measuring instruments and calibration equipment.
When the Fluke Calibration 6109A is used for temperature sensor calibration, the measurement uncertainty must be evaluated according to the complete measurement procedure.
Relevant uncertainty contributions may include:
- Calibration bath temperature accuracy
- Temperature stability
- Temperature uniformity
- Reference thermometer calibration uncertainty
- Thermometer readout uncertainty
- Sensor immersion effects
- Measurement repeatability
- Temperature drift during measurement
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Why Choose the Fluke Calibration 6109A?
The Fluke Calibration 6109A combines high temperature calibration performance with compact, portable construction.
Its temperature range from +35 °C to +250 °C covers numerous industrial and laboratory applications.
A maximum permissible temperature error of ±0.1 °C, stability of 0.015 °C and excellent temperature uniformity provide reliable conditions for comparison calibration.
The spacious liquid bath accommodates up to four tri-clamp sanitary temperature sensors simultaneously.
This can significantly improve calibration throughput and reduce production downtime.
The stainless steel housing and sealed keypad make the instrument suitable for hygienic production environments.
A large color display, temperature stabilization indicator and integrated safety functions simplify daily operation.
The optional 6109A-P configuration adds integrated reference thermometer and process measurement capabilities.
For calibration laboratories, pharmaceutical manufacturers, biotechnology companies and industrial users requiring a portable high-performance temperature calibration bath, the Fluke Calibration 6109A provides an excellent combination of accuracy, efficiency and flexibility.
europascal supports customers with professional temperature calibration equipment, technical advice and calibration services.
Typical Applications for the Fluke Calibration 6109A
Typical applications include:
- Temperature sensor calibration
- Sanitary temperature sensor calibration
- Tri-clamp sensor calibration
- Pt100 calibration
- RTD calibration
- Thermocouple calibration
- Temperature transmitter calibration
- Pharmaceutical manufacturing
- Biotechnology
- Food processing
- Beverage production
- Hygienic process technology
- Industrial quality assurance
- Calibration laboratories
- Temperature metrology
- Process instrumentation maintenance
The combination of high temperature stability, excellent uniformity, portable construction and efficient multi-sensor calibration makes the Fluke Calibration 6109A a professional solution for demanding temperature calibration applications.
Find more Fluke Calibration products here.
Manufacturer information for the Fluke Calibration 6109A can be found on the official Fluke Calibration website.
