The Fluke Calibration 7109A is a high-precision portable temperature calibration bath designed for accurate temperature sensor calibration in laboratories, pharmaceutical manufacturing, biotechnology, food production and industrial process applications.
With a temperature range from −25 °C to +140 °C, a maximum permissible temperature error of ±0.1 °C and excellent temperature stability of 0.01 °C, the Fluke Calibration 7109A provides reliable performance for demanding temperature calibration applications.
The instrument combines a compact, portable design with a spacious liquid bath that accommodates up to four sanitary tri-clamp temperature sensors simultaneously.
This makes the Fluke Calibration 7109A particularly suitable for hygienic production environments where multiple temperature sensors must be calibrated efficiently and accurately.
Its stainless steel housing, large color display and integrated temperature control system provide convenient operation in calibration laboratories and industrial facilities.
Unlike conventional dry block calibrators, the Fluke Calibration 7109A uses a liquid calibration medium to provide excellent thermal contact with temperature sensors of different shapes and dimensions.
The instrument is particularly useful for calibrating temperature sensors used in pharmaceutical production, biotechnology, food processing, refrigeration systems and temperature-controlled storage facilities.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Temperature range from −25 °C to +140 °C
- Lower temperature limit of −15 °C without the bath cover
- Maximum permissible temperature error of ±0.1 °C
- Excellent temperature stability of 0.01 °C
- Typical temperature uniformity of 0.02 °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 liquid bath
- Working area of 75 mm × 75 mm
- Maximum fluid depth of 154 mm
- Portable construction
- Weight of approximately 20 kg
- Stainless steel housing
- Suitable for hygienic production environments
- Large color display
- 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 −25 °C to +140 °C
The Fluke Calibration 7109A provides a temperature calibration range of:
−25 °C to +140 °C
This range makes the instrument particularly suitable for applications requiring temperatures below ambient temperature.
The specified lower temperature limit of −25 °C applies when the appropriate bath cover is installed.
Without the cover, the lower temperature limit is:
−15 °C
The temperature range is specified at an ambient temperature of 25 °C.
This makes the Fluke Calibration 7109A suitable for temperature sensor calibration in refrigeration systems, pharmaceutical storage facilities, biotechnology applications and industrial processes.
Typical calibration temperatures include:
- −20 °C
- −10 °C
- 0 °C
- 20 °C
- 40 °C
- 60 °C
- 100 °C
- 120 °C
- 140 °C
The appropriate calibration fluid must be selected according to the required temperature range and the manufacturer’s operating instructions.
Maximum Permissible Temperature Error of ±0.1 °C
The Fluke Calibration 7109A provides excellent temperature measurement performance.
The manufacturer specifies a maximum permissible temperature error of:
±0.1 °C
This specification includes relevant uncertainty contributions such as calibration uncertainty, temperature stability, temperature uniformity and repeatability.
The temperature specifications describe the absolute instrumental uncertainty at a 95% confidence level with a coverage factor of k = 2.
They apply within one year after calibration and include ambient temperature effects between 13 °C and 33 °C.
For demanding temperature calibration applications, the measurement uncertainty of the complete calibration system must be evaluated.
Additional uncertainty contributions may arise from the reference thermometer, thermometer readout and device under test.
Excellent Temperature Stability of 0.01 °C
The Fluke Calibration 7109A provides outstanding temperature stability.
The manufacturer specifies:
0.01 °C
Temperature stability describes how much the bath temperature changes over time under specified operating conditions.
High temperature stability is particularly important when several temperature sensors are calibrated simultaneously.
A stable calibration environment reduces temperature variations during the measurement process.
This helps improve the repeatability and reliability of comparison calibrations.
For accurate measurements, sufficient stabilization time should be allowed after changing the temperature setpoint.
Excellent Temperature Uniformity
The Fluke Calibration 7109A provides excellent temperature uniformity throughout its specified working volume.
The manufacturer specifies typical temperature uniformity of:
0.02 °C
Temperature uniformity describes the spatial temperature differences within the calibration bath.
Good temperature uniformity is essential when multiple temperature sensors are calibrated simultaneously.
If sensors are exposed to different temperatures, additional measurement errors may occur.
The liquid calibration medium and integrated circulation system help provide a homogeneous temperature environment.
This makes the Fluke Calibration 7109A particularly suitable for multi-sensor calibration applications.
Temperature Repeatability
The Fluke Calibration 7109A provides excellent temperature repeatability.
The manufacturer specifies:
0.04 °C
Repeatability describes the ability of the calibration bath to reproduce temperature conditions during repeated measurements.
Good repeatability is particularly important for routine calibration procedures performed at the same temperature points.
The Fluke Calibration 7109A provides reliable temperature conditions for repeated sensor calibration and quality assurance measurements.
Calibration of Up to Four Tri-Clamp Sensors
A major advantage of the Fluke Calibration 7109A is its ability to calibrate multiple sanitary temperature sensors simultaneously.
The bath accommodates up to:
Four tri-clamp temperature sensors
with 38 mm flanges in a single calibration batch.
Tri-clamp temperature sensors are widely used in hygienic production environments.
Typical applications include:
- Pharmaceutical manufacturing
- Biotechnology
- Food production
- Beverage processing
- Cleanroom production
- Hygienic process installations
The ability to calibrate several sensors simultaneously can significantly reduce calibration time.
This helps minimize production downtime and improves the efficiency of routine calibration procedures.
The large bath opening also allows temperature sensors with different geometries to be calibrated.
Large 2.5-Liter Calibration Bath
The Fluke Calibration 7109A features a liquid bath with a fluid capacity of:
2.5 liters
The specified working area measures:
75 mm × 75 mm
The maximum fluid depth is:
154 mm
The tank opening measures approximately 112 mm × 112 mm.
This spacious design allows several temperature sensors to be immersed simultaneously.
The liquid medium provides good thermal contact between the reference thermometer and the devices under test.
Compared with dry block calibrators, liquid baths offer advantages when sensors have unusual shapes, large process connections or different diameters.
The actual usable working volume and immersion requirements must be observed when performing precision calibration.
Portable Temperature Calibration
Despite its high measurement performance, the Fluke Calibration 7109A is designed for portable operation.
The instrument weighs approximately:
20 kg
Its dimensions are:
- Height: 382 mm
- Width: 242 mm
- Depth: 400 mm
The compact design makes the calibration bath suitable for use in laboratories and industrial facilities.
A fixed carrying handle allows the instrument to be transported conveniently.
Additional recessed handles support safe handling when moving the bath between workbenches, shelves and transport carts.
A sealed transport cover helps prevent fluid spills during movement.
The manufacturer’s instructions for safe transport and handling must always be followed.
Stainless Steel Housing
The Fluke Calibration 7109A features a robust stainless steel housing.
This construction is particularly suitable for demanding industrial environments.
The housing is designed to withstand cleaning chemicals commonly used in hygienic production facilities.
The sealed keypad provides protection against moisture during cleaning.
This makes the Fluke Calibration 7109A suitable for applications in pharmaceutical manufacturing, biotechnology and food processing.
The compatibility of cleaning agents with the instrument materials should nevertheless be checked before use.
Large Color Display
The Fluke Calibration 7109A features a large color display that provides clear 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 routine calibration procedures and multi-point temperature measurements.
Temperature Stabilization Indicator
The Fluke Calibration 7109A 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 instrument without continuously checking the display.
For demanding reference measurements, the stabilization requirements of the calibration procedure must still be observed.
Hot Surface Warning
The Fluke Calibration 7109A 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 when calibrating sensors at elevated temperatures.
Appropriate protective equipment and safe handling procedures must always be used.
Fast Heating Performance
The Fluke Calibration 7109A provides efficient heating performance.
The manufacturer specifies the following typical heating times:
| Temperature Change | Typical Heating Time |
|---|---|
| −25 °C to +25 °C | 35 minutes |
| +25 °C to +140 °C | 55 minutes |
These values describe typical heating performance under the manufacturer’s specified operating conditions.
Actual heating times depend on ambient temperature, 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 7109A also provides controlled cooling performance.
The manufacturer specifies the following typical cooling times:
| Temperature Change | Typical Cooling Time |
|---|---|
| +140 °C to +25 °C | 45 minutes |
| +25 °C to −25 °C | 75 minutes |
Cooling times depend on operating conditions and the thermal properties of the calibration fluid.
The integrated cooling system makes the Fluke Calibration 7109A particularly suitable for applications requiring temperatures below ambient temperature.
Temperature Settling Time
The manufacturer specifies a typical settling time of:
10 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 must also be considered.
The required stabilization time may vary depending on sensor dimensions, immersion depth and thermal response.
Optional Process Measurement Electronics
The Fluke Calibration 7109A is available in two configurations.
Fluke Calibration 7109A
The standard model provides precise temperature generation and control.
It is designed for use with external reference thermometers and measurement instruments.
Fluke Calibration 7109A-P
The 7109A-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 platinum 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 7109A-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 7109A, a separate thermometer readout is required.
The 7109A-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 7109A 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 7109A 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 7109A-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 7109A provides the controlled temperature environment required for transmitter calibration.
The 7109A-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 7109A |
|---|---|
| Manufacturer | Fluke Calibration |
| Model | 7109A |
| Product type | Portable Temperature Calibration Bath |
| Temperature range | −25 °C to +140 °C |
| Lower limit without cover | −15 °C |
| Maximum permissible temperature error | ±0.1 °C |
| Temperature stability | 0.01 °C |
| Typical temperature uniformity | 0.02 °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 |
| Tank opening | Approx. 112 × 112 mm |
| Tri-clamp sensor capacity | Up to 4 |
| Typical settling time | 10 minutes |
| Heating time, −25 °C to +25 °C | 35 minutes |
| Heating time, +25 °C to +140 °C | 55 minutes |
| Cooling time, +140 °C to +25 °C | 45 minutes |
| Cooling time, +25 °C to −25 °C | 75 minutes |
| Display | Color display |
| Housing | Stainless steel |
| Dimensions (H × W × D) | 382 × 242 × 400 mm |
| Weight | Approx. 20 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 | 7109A-P |
Fluke Calibration 7109A or 6109A?
The Fluke Calibration 7109A and 6109A 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 simultaneously.
The main difference is the available temperature range.
| Specification | Fluke Calibration 7109A | Fluke Calibration 6109A |
|---|---|---|
| Temperature range | −25 °C to +140 °C | +35 °C to +250 °C |
| Maximum permissible error | ±0.1 °C | ±0.1 °C |
| Temperature stability | 0.01 °C | 0.015 °C |
| Typical uniformity | 0.02 °C | 0.03–0.04 °C |
| Fluid volume | 2.5 liters | 2.5 liters |
| Weight | 20 kg | 16 kg |
| Optional process electronics | Yes | Yes |
The Fluke Calibration 7109A is particularly suitable for applications requiring temperatures below ambient temperature.
The Fluke Calibration 6109A is designed for applications requiring temperatures up to 250 °C.
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 7109A 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
The individual uncertainty contributions must be evaluated carefully to avoid double-counting effects already included in the manufacturer’s specifications.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Why Choose the Fluke Calibration 7109A?
The Fluke Calibration 7109A combines excellent temperature calibration performance with compact, portable construction.
Its temperature range from −25 °C to +140 °C covers numerous industrial and laboratory applications, including refrigeration, pharmaceutical manufacturing and biotechnology.
A maximum permissible temperature error of ±0.1 °C, stability of 0.01 °C and typical temperature uniformity of 0.02 °C 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 7109A-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 7109A 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 7109A
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
- Refrigeration systems
- Temperature-controlled storage
- Cleanroom production
- Industrial quality assurance
- Calibration laboratories
- Temperature metrology
- Process instrumentation maintenance
The combination of excellent temperature stability, outstanding uniformity, portable construction and efficient multi-sensor calibration makes the Fluke Calibration 7109A a professional solution for demanding temperature calibration applications.
Find more Fluke Calibration products here.
Manufacturer information for the Fluke Calibration 7109A can be found on the official Fluke Calibration website.
