Description
The eXacal 230 is a highly precise standard platinum resistance thermometer (SPRT) specifically designed for use in metrology laboratories. It offers exceptional stability, low measurement uncertainties, and is perfectly aligned with the requirements of the International Temperature Scale (ITS-90). With a measurement range of -200 °C to +670 °C, it is the ideal choice for calibrations in research and industry.
Features
• Precision: Outstanding measurement accuracy with minimal uncertainties.
• Temperature Range: The standard platinum resistance thermometer (SPRT) is suitable for temperatures from -200 °C to +670 °C.
• Quality: Made from high-purity platinum for maximum stability and reliability.
• Traceability: The eXacal 230 standard platinum resistance thermometer fully complies with the requirements of ITS-90.
Applications
• Calibration of industrial sensors and reference thermometers
• Precise temperature measurements in metrology laboratories
• Traceability of temperature measurements to international standards
Accredited Calibration According to DIN EN ISO/IEC 17025
In our accredited calibration laboratory according to DIN EN ISO/IEC 17025 (DAkkS), we calibrate standard platinum resistance thermometers (SPRTs) with the highest precision. Each calibrated thermometer comes with a calibration certificate that documents traceability and the specified measurement uncertainty.
Measurement Uncertainty of Standard Platinum Resistance Thermometers (SPRT)
| Range | Temperature Fixed Points | Measurement Uncertainty |
| -189.3442 °C – 0.01 °C | Argon to Water | 5.5 mK |
| -38.8344 °C – 0.01 °C | Mercury to Water | 2.5 mK |
| 0.01 °C – 29.7646 °C | Water to Gallium | 4.5 mK |
| 0.01 °C – 420.527 °C | Water to Zinc | 4.5 mK |
| 0.01 °C – 660.323 °C | Water to Aluminum | 7.0 mK |
The specified measurement uncertainties correspond to k=2, include an ITS-90 deviation function, self-heating, and hysteresis, and are stated for the respective range.
Learn more about our calibration laboratory:
Calibration of Standard Platinum Resistance Thermometers
Temperature Sensors from Our Own Manufacturing Facility
Each temperature sensor of the eXacal 230 standard platinum resistance thermometer (SPRT) is crafted with utmost care and precision in our in-house manufacturing facility in Fulda. The development and production of our own sensing elements ensure the highest quality and reliability.
Why Choose Klasmeier Manufacturing?
• Craftsmanship Precision: Our SPRTs are made by experienced experts who carefully oversee every detail.
• Customized Solutions: We can cater to specific requirements and create tailored sensors for your applications.
• Quality Control: Every sensor undergoes rigorous testing to ensure it meets the high standards of the International Temperature Scale ITS-90.
By manufacturing in-house, we maintain full control over the entire production process – from selecting materials to the final accredited calibration. The result: a product that meets the highest demands in metrology.
Technical Specifications
| Technical Data Model 230 | |
| Model | eXacal 230 |
| Temperature Range | -200 °C to 670 °C |
| Nominal Resistance | Pt25 (approx. 25.5 Ohm) |
| Connection Type | Four-wire |
| Connector | Lug Connector |
| Sheath Material | Quartz |
| Thermometer Wire | Platinum |
| Dimensions | |
| Handle | ⌀ 20 mm x 100 mm |
| Sheath Diameter | ⌀ 7.5 mm |
| Sheath Length | 500 mm |
| Sheath Filling | Protective Gas |
| Cable Length | 2 m |
| Measuring Element / Temperature Sensor | |
| Length | 40 mm |
| Type | Quartz (complies with ITS-90 requirements) |
| Recommended Measuring Current | 1 mA |
| Self-Heating | 1 mA at the Gallium Fixed Point |
| W Value | W-Gallium ≥ 1.11807 (complies with ITS-90 requirements) |
| Calibration | |
| Fixed-Point Calibration | Supplied with DAkkS calibration according to DIN EN ISO/IEC 17025 (see sample calibration certificate) or as traceable calibration with WTP, W(Ga), and W(Al) values provided |
