The Fluke Calibration 1504 is a high-precision digital thermometer readout designed for accurate temperature measurement using thermistor sensors. Developed by Fluke Calibration, the 1504 Tweener combines exceptional measurement accuracy, high resolution and reliable resistance measurement technology in a compact instrument suitable for calibration laboratories, industrial applications and temperature metrology.
With an accuracy of up to ±0.002 °C and a temperature resolution of 0.0001 °C, the Fluke Calibration 1504 provides excellent performance for demanding temperature measurement applications.
The instrument is specifically designed for thermistor temperature sensors and supports resistance measurements over a wide range. Its high sensitivity makes it particularly suitable for temperature measurements where small temperature changes must be detected reliably.
The Fluke Calibration 1504 is ideal for use with precision thermistor probes in temperature calibration baths, reference temperature measurement systems and laboratory calibration procedures.
The instrument supports programmable sensor coefficients, allowing users to configure the thermometer readout according to the characteristics of the connected thermistor.
An integrated RS-232 interface enables communication with computers and calibration software. An optional IEEE-488 interface is available for integration into automated measurement systems.
The compact construction makes the Fluke Calibration 1504 suitable for both laboratory and field applications.
At europascal, the Fluke Calibration 1504 provides a professional solution for precise temperature measurement and calibration. europascal supports customers with temperature calibration equipment, reference thermometers and professional calibration services.
For reliable measurement results and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- High-precision digital thermometer readout
- Specifically designed for thermistor sensors
- Temperature measurement accuracy up to ±0.002 °C
- Temperature resolution of 0.0001 °C
- Resistance measurement capability
- Thermistor resistance range up to 500 kΩ
- Suitable for precision temperature measurements
- Programmable thermistor calibration coefficients
- Steinhart-Hart temperature conversion
- High measurement sensitivity
- Excellent measurement repeatability
- Digital temperature indication
- Temperature display in °C, °F and K
- Resistance display in ohms
- Measurement rates up to two readings per second
- RS-232 communication interface
- Optional IEEE-488 interface
- Compatible with Fluke LogWare software
- Compatible with MET/TEMP II calibration software
- Compact and lightweight construction
- Suitable for laboratory and field applications
- Ideal for temperature calibration baths
- Suitable for reference temperature measurements
- Professional calibration support from europascal
High-Precision Temperature Measurement
The Fluke Calibration 1504 is designed for applications requiring accurate and repeatable temperature measurements.
The manufacturer specifies an accuracy of up to:
±0.002 °C
This high level of accuracy makes the instrument suitable for demanding temperature metrology applications.
The Fluke Calibration 1504 uses precision resistance measurement technology to determine the resistance of a connected thermistor.
The measured resistance is converted into temperature using the selected sensor characteristic.
For accurate temperature measurements, the thermistor calibration coefficients must correspond to the connected sensor.
The total measurement uncertainty depends on the readout, the thermistor probe, its calibration and the measurement conditions.
Exceptional Temperature Resolution
One of the most important features of the Fluke Calibration 1504 is its excellent temperature resolution.
The instrument provides a resolution of:
0.0001 °C
This corresponds to:
0.1 mK
Such a high resolution allows very small temperature changes to be observed.
This is particularly useful when evaluating temperature stability in calibration baths and precision temperature sources.
The high resolution also supports the analysis of temperature fluctuations during calibration procedures.
It is important to distinguish between resolution and measurement accuracy.
Although the Fluke Calibration 1504 displays temperature changes as small as 0.0001 °C, the measurement uncertainty of the complete system must be considered separately.
Designed for Thermistor Temperature Sensors
The Fluke Calibration 1504 is specifically designed for thermistor temperature sensors.
Thermistors are temperature-dependent resistors whose electrical resistance changes significantly with temperature.
Precision thermistors offer excellent sensitivity over relatively limited temperature ranges.
They are particularly useful for accurate measurements near room temperature and in laboratory temperature calibration applications.
The Fluke Calibration 1504 measures the electrical resistance of the thermistor and converts it into a temperature indication.
The instrument is suitable for precision thermistors with resistance values up to 500 kΩ.
Its measurement characteristics are optimized for thermistor applications.
Temperature Measurement from 0 °C to 100 °C
The Fluke Calibration 1504 is particularly suitable for precision temperature measurements in the range:
0 °C to 100 °C
This is the typical temperature range highlighted by Fluke for high-accuracy thermistor applications.
The actual usable temperature range depends on the connected thermistor and its calibration characteristics.
The instrument supports different thermistor resistance ranges and is not restricted to one specific sensor model.
This flexibility allows users to select a suitable thermistor according to their measurement requirements.
Precision Resistance Measurement
The Fluke Calibration 1504 provides accurate resistance measurement for thermistor sensors.
The instrument supports thermistor resistance values from near zero up to:
500 kΩ
This wide resistance range allows the instrument to accommodate different thermistor characteristics.
Resistance measurement is particularly important because the temperature indication is calculated from the measured resistance.
The accuracy of the resistance measurement therefore directly influences the temperature measurement result.
The Fluke Calibration 1504 is designed to provide high measurement accuracy and repeatability over the supported resistance ranges.
Steinhart-Hart Temperature Conversion
The Fluke Calibration 1504 supports the Steinhart-Hart equation for converting thermistor resistance into temperature.
The Steinhart-Hart equation describes the nonlinear relationship between thermistor resistance and absolute temperature.
A common form of the equation is:
1/T = A + B × ln(R) + C × [ln(R)]³
Where:
- T = Absolute temperature in kelvin
- R = Thermistor resistance
- A, B and C = Sensor-specific calibration coefficients
The coefficients are determined during thermistor calibration.
By entering the appropriate coefficients, the Fluke Calibration 1504 can calculate temperature according to the characteristics of the connected sensor.
This improves measurement accuracy compared with using a generic thermistor characteristic.
Programmable Sensor Coefficients
The Fluke Calibration 1504 allows users to enter sensor-specific calibration coefficients.
These coefficients describe the relationship between thermistor resistance and temperature.
This feature is particularly useful when working with calibrated reference thermistors.
A calibrated thermistor may be supplied with a certificate containing the coefficients required for accurate temperature conversion.
The coefficients can be programmed into the Fluke Calibration 1504.
The instrument then uses the stored information to calculate the temperature from the measured resistance.
This allows the readout to be matched to the connected sensor.
Reference Temperature Measurements
The Fluke Calibration 1504 is suitable for use as part of a reference temperature measurement system.
When combined with a calibrated precision thermistor, the instrument can provide accurate reference temperature measurements.
Typical applications include:
- Reference measurements in temperature calibration baths
- Temperature comparison measurements
- Monitoring of temperature stability
- Calibration of industrial temperature sensors
- Verification of temperature indicators
- Laboratory temperature measurements
The high resolution and excellent measurement accuracy make the instrument particularly useful for applications requiring small measurement uncertainties.
Temperature Calibration Baths
The Fluke Calibration 1504 is well suited for reference temperature measurements in liquid calibration baths.
Liquid calibration baths provide stable and homogeneous temperature conditions.
A calibrated thermistor connected to the Fluke Calibration 1504 can be immersed in the bath.
The instrument measures the thermistor resistance and calculates the corresponding temperature.
The measured reference temperature can then be compared with the indication of a device under test.
This method is commonly used for comparison calibration of temperature sensors.
The overall calibration uncertainty depends on several factors, including reference thermometer calibration, bath stability, bath homogeneity and sensor immersion conditions.
Temperature Stability Measurements
Temperature stability is an important characteristic of calibration baths and temperature-controlled environments.
The Fluke Calibration 1504 provides high-resolution measurements that allow small temperature variations to be observed.
The instrument can be connected to a computer using its communication interface.
Measurement data can then be recorded and evaluated using compatible software.
This allows technicians to analyze temperature fluctuations over time.
Typical applications include evaluating the stability of calibration baths and monitoring reference temperature conditions.
Fast Measurement Rate
The Fluke Calibration 1504 supports measurement rates of up to:
Two readings per second
This allows temperature changes to be monitored continuously.
The measurement rate is suitable for many laboratory and industrial temperature measurement applications.
When connected to a computer, the instrument can also be used for automated data acquisition.
Digital Temperature Display
The Fluke Calibration 1504 features a digital display designed for clear temperature indication.
The instrument can display measurement results in different units.
Supported temperature units include:
- Degrees Celsius (°C)
- Degrees Fahrenheit (°F)
- Kelvin (K)
Resistance measurements can also be displayed in ohms.
This allows the instrument to be used for both temperature measurements and direct resistance evaluation.
RS-232 Communication Interface
The Fluke Calibration 1504 includes an RS-232 communication interface.
The interface allows the instrument to communicate with a computer or compatible measurement system.
This enables automated measurement acquisition and remote instrument control.
The RS-232 interface is particularly useful in calibration laboratories where measurement data must be recorded and documented.
Optional IEEE-488 Interface
An optional IEEE-488 interface is available for the Fluke Calibration 1504.
IEEE-488, also known as GPIB, is widely used in automated laboratory measurement systems.
The interface allows the thermometer readout to be integrated into computer-controlled calibration systems.
This is particularly useful when several measurement instruments must be controlled through a central computer.
The IEEE-488 option provides additional flexibility for automated calibration applications.
Fluke LogWare Software
The Fluke Calibration 1504 is compatible with Fluke LogWare software.
LogWare supports computer-based temperature measurement and data acquisition.
The software can be used to record temperature measurements over time.
Typical functions include:
- Temperature data acquisition
- Measurement logging
- Graphical display of temperature trends
- Analysis of temperature stability
- Measurement documentation
This makes the Fluke Calibration 1504 suitable for temperature monitoring applications requiring recorded measurement data.
MET/TEMP II Calibration Software
The Fluke Calibration 1504 is also compatible with Fluke MET/TEMP II calibration software.
MET/TEMP II is designed for automated temperature calibration procedures.
The software supports the integration of compatible reference thermometers and temperature calibration equipment.
This allows calibration laboratories to automate measurement sequences and improve documentation.
The Fluke Calibration 1504 can be used as a reference thermometer readout within compatible automated calibration systems.
Compact Design for Laboratory and Field Use
The Fluke Calibration 1504 belongs to the compact Tweener series of thermometer readouts.
Its small size makes it suitable for laboratory benches and portable measurement setups.
The instrument can be used with compatible precision thermistor probes in different temperature measurement applications.
An optional protective carrying case is available.
The Fluke 9301 carrying case can accommodate a Tweener thermometer readout and a compatible temperature probe.
This provides additional protection during transport and storage.
Technical Highlights
| Feature | Fluke Calibration 1504 |
|---|---|
| Product type | Precision Thermometer Readout |
| Manufacturer | Fluke Calibration |
| Product series | Tweener |
| Sensor type | Thermistor |
| Temperature accuracy | Up to ±0.002 °C |
| Temperature resolution | 0.0001 °C |
| Temperature range | Depends on thermistor; typical 0–100 °C |
| Resistance measurement range | Up to 500 kΩ |
| Temperature conversion | Steinhart-Hart |
| Programmable sensor coefficients | Yes |
| Temperature units | °C, °F, K |
| Resistance display | Ω |
| Measurement rate | Up to 2 readings per second |
| Standard communication | RS-232 |
| Optional communication | IEEE-488 |
| Compatible software | Fluke LogWare |
| Calibration automation software | MET/TEMP II |
| Application | Precision Thermistor Measurement |
| Construction | Compact Benchtop Instrument |
Available Models
The Fluke Calibration 1504 is available in different configurations.
Fluke Calibration 1504
The standard version provides high-precision thermistor temperature measurement with an RS-232 communication interface.
Fluke Calibration 1504-2506
This version includes an IEEE-488 communication interface.
It is particularly suitable for integration into automated laboratory measurement systems.
Accessories and Configuration Options
The Fluke Calibration 1504 can be combined with various accessories.
Available options include:
- Precision thermistor probes
- Reference thermistor sensors
- RS-232 communication cables
- IEEE-488 interface option
- Fluke LogWare software
- MET/TEMP II calibration software
- Protective carrying cases
- System calibration services
- Accredited calibration options
The exact delivery configuration depends on the selected model and ordering options.
Typical Applications
The Fluke Calibration 1504 is suitable for:
- Precision temperature measurement
- Thermistor temperature measurement
- Reference temperature measurements
- Temperature calibration baths
- Temperature comparison calibration
- Temperature stability monitoring
- Laboratory temperature calibration
- Industrial temperature measurement
- Temperature metrology
- Quality assurance
- Research laboratories
- Pharmaceutical laboratories
- Medical technology
- Biotechnology
- Automated temperature calibration
- Temperature data logging
- Reference thermometer systems
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 1504 can be calibrated to verify its resistance measurement and temperature indication functions.
When used with a calibrated thermistor, the complete measurement system can provide accurate reference temperature measurements.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
europascal also supports customers with the selection of suitable reference thermometers, temperature calibration equipment and accessories.
Why Choose the Fluke Calibration 1504?
The Fluke Calibration 1504 combines excellent temperature measurement accuracy, high resolution and flexible thermistor compatibility in one compact instrument.
With accuracy up to ±0.002 °C and temperature resolution of 0.0001 °C, the instrument is particularly suitable for demanding temperature measurement applications.
Its support for thermistor resistance measurements up to 500 kΩ allows different precision thermistor sensors to be used.
Programmable sensor coefficients enable the instrument to be matched to the characteristics of a calibrated thermistor.
The Steinhart-Hart temperature conversion provides accurate calculation of temperature from measured resistance.
RS-232 communication and the optional IEEE-488 interface support integration into automated measurement systems.
Compatibility with Fluke LogWare and MET/TEMP II software further extends the instrument’s functionality.
The compact construction makes the Fluke Calibration 1504 suitable for both laboratory and field applications.
For professional users requiring highly accurate thermistor temperature measurements, the Fluke Calibration 1504 provides an excellent combination of precision, flexibility and reliability.
europascal supports customers with temperature calibration equipment, reference thermometers and professional calibration services.
