Description
Special features of secondary SPRT model 217:
Temperature range: With an operating range of -100 °C to 430 °C, our Model 217 secondary SPRT reference thermometer covers a medium temperature range for common applications. This makes it a versatile solution for a wide variety of measurement requirements.
Low measurement uncertainties: The precision of the thermometer is underlined by its low measurement uncertainties of only 2.5 mK to 8.5 mK with DAkkS-accredited calibration according to DIN EN ISO/IEC 17025. This high accuracy ensures reliable results in all areas of application.
Robustness: As a robust alternative to highly sensitive SPRTs with quartz jackets, our secondary SPRT reference thermometer stands out thanks to its metal jacket and stable measuring resistors. This makes it ideal for long-term use.
New SPRT sensor: The SPRT temperature sensor newly developed by Klasmeier has been improved in the following areas:
- quick response
- low hysteresis
- low self-heating
- Excellent reproducibility and stability
Temperature sensors from our own factory
Each temperature sensor in the eXacal 230 Standard Platinum Resistance Thermometer (SPRT) is manufactured with the utmost care and precision at our in-house production facility in Fulda. Developing and manufacturing our own measuring resistors guarantees the highest quality and reliability.
Why Klasmeier Manufacturing?
Quality control: Each sensor undergoes rigorous testing to ensure that it meets the high requirements of the ITS-90 international temperature scale.
Precision craftsmanship: Our SPRTs are manufactured by experienced experts who carefully monitor every detail.
Custom solutions: We can respond to specific requirements and manufacture tailor-made sensors for your application.
By manufacturing in our own factory, we have full control over the entire production process—from the selection of materials to the final accredited calibration. The result: a product that meets the highest standards in measurement technology.
DAkkS-certified calibration of secondary SPRTs
In our in-house DAkkS-accredited calibration laboratory, we offer high-precision calibration services for SPRTs. Our accreditation guarantees that every calibration is performed in accordance with the internationally recognized standards of DIN EN ISO/IEC 17025. This ensures complete traceability to national and international standards.
| Temperature range | Fixed points | Measurement uncertainty |
| -38,8344 °C – 0,01 °C | Mercury to Water | 3,5 mK |
| 0,01 °C – 29,7646 °C | Water to Gallium | 3,5 mK |
| 0,01 °C – 156,5985 °C | Water to Indium | 6 mK |
| 0,01 °C – 231,928 °C | Water to Tin | 8,5 mK |
| 0,01 °C – 419,527 °C | Water to Zinc | 12 mK |
What makes our calibration special?
Traceability: Thanks to our DAkkS accreditation, every calibration is directly linked to national and international standards. This gives you the assurance that your measurement results are recognized worldwide.
Measurement uncertainty: The accuracy of our calibration is based on a careful evaluation of all uncertainty components, including the reproducibility of the thermometer, the ITS-90 deviation function, self-heating, and sensor hysteresis.
Application: With the detailed information provided in the calibration certificate, you can use your secondary SPRT with complete confidence in the temperature range from -38.8344 °C to 419.527 °C.
Learn more about our calibration laboratory:
