Description
Key features of the secondary SPRT model 217:
Temperature range: With an operating range of -100 °C to 430 °C, our secondary SPRT reference thermometer model 217 covers a mid-range temperature span for common applications. This makes it a versatile solution for a wide range of measurement requirements.
Low measurement uncertainties: The thermometer’s precision is underscored by its low measurement uncertainties of just 2.5 mK to 8.5 mK with DAkkS-accredited calibration to DIN EN ISO/IEC 17025. This high accuracy ensures reliable results across all applications.
Robustness: As a robust alternative to very sensitive SPRTs with a quartz sheath, our secondary SPRT reference thermometer stands out with its metal sheath and stable sensing resistors. This makes it ideal for long-term use.
New SPRT sensor: The newly developed SPRT temperature sensor from Klasmeier has been improved in the following areas:
- fast response time
- low hysteresis
- low self-heating
- excellent reproducibility and stability
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.
DAkkS-certified calibration of secondary SPRTs
In our in-house DAkkS-accredited calibration laboratory, we offer high-precision calibration services for SPRTs. Our accreditation ensures that every calibration is performed in accordance with the internationally recognized standards of DIN EN ISO/IEC 17025. This ensures seamless traceability to national and international standards.
| Range | Temperature 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 confidence 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 thermometer’s reproducibility, the ITS-90 deviation function, self-heating, and sensor hysteresis.
Operating range: With the detailed information from 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:
