Description
The eXacal Model 230 is a high-precision Standard Platinum Resistance Thermometer (SPRT) specifically developed for use in metrological 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: Manufactured 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 metrological 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. For each calibrated thermometer, you receive a calibration certificate documenting traceability and the stated measurement uncertainty.
Measurement Uncertainty of Standard Platinum Resistance Thermometer (SPRT)
Measurement Uncertainties by Temperature Range
| Temperature Range | Fixed Points | Measurement Uncertainty |
| -189.3442 °C – 0.01 °C | Argon to Water Triple Point | 5.5 mK |
| -38.8344 °C – 29.7646 °C | Mercury to Gallium | 3.5 mK |
| 0.01 °C – 29.7646 °C | Water Triple Point to Gallium | 2.5 mK |
| 0.01 °C – 420.527 °C | Water Triple Point to Zinc | 4.5 mK |
| 0.01 °C – 660.323 °C | Water Triple Point to Aluminum | 7.0 mK |
Measurement Uncertainties at ITS-90 Fixed Points
| Temperature | Fixed Point | Measurement Uncertainty |
| -189.3442 °C | Argon | 4.0 mK |
| -38.8344 °C | Mercury | 2.5 mK |
| 0.01 °C | Water Triple Point | 1.5 mK |
| 29.7646 °C | Gallium | 2.0 mK |
| 231.928 °C | Tin | 3.0 mK |
| 419.527 °C | Zinc | 3.0 mK |
| 660.323 °C | Aluminum | 5.0 mK |
The stated measurement uncertainties correspond to k=2 and take into account the ITS-90 deviation function and self-heating.
Learn more about our calibration laboratory:
Calibration of Standard Platinum Resistance Thermometers
Temperature Sensors from our Own Manufacturing Facility
Every temperature sensor of the eXacal 230 Standard Platinum Resistance Thermometer (SPRT) is manufactured with the utmost care and precision in our in-house facility in Fulda. The development and production of our own measuring resistors guarantee the highest quality and reliability.
Why Klasmeier Manufacturing?
• Craftsmanship Precision: Our SPRTs are manufactured by experienced experts who carefully monitor every detail.
• Individual Solutions: We can address specific requirements and produce customized sensors for your application.
• Quality Control: Every sensor undergoes strict testing procedures to ensure it meets the high requirements of the International Temperature Scale ITS-90.
By manufacturing in our own facility, we have full control over the entire production process – from material selection to final accredited calibration. The result: a product that meets the highest demands in measurement technology.
