ISOTECH NPL Platinum / Palladium Thermocouple
Brand :
ISOTECH
Categories :
Primary Standards
These Platinum / Palladium Thermocouples (Pt/Pd) are manufactured by the National Physical Laboratory (NPL) who have developed a novel physical mechanism which mitigates the mechanical stresses caused by the different thermal expansion of Pt and Pd wires.
- Superior Stability
- Gas Tight Assembly
- Premium Grade Wire
Specifications
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How to order
0°C to 1500°C. Uncertainty of ±0.2°C from 0°C to 1100°C rising linearly to ±0.7°C at 1500°C. Calibrated at Fixed Points Zn, Ag, Pd-c.
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Temperature Range
0 to 1500°C
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Reference Junction
Enclosed in a Quartz sheath
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Applicable Standard
IEC 62460 Edition 1.0
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Sheath Materials Measuring Junction
4mm x 710mm fits into a removable 7mm x 700mm protective outer ceramic sheath
These Platinum / Palladium Thermocouples (Pt/Pd) are manufactured by the National Physical Laboratory (NPL) who have developed a novel physical mechanism which mitigates the mechanical stresses caused by the different thermal expansion of Pt and Pd wires. This dispenses with the fragile coil conventionally used with this type of thermocouple.
Platinum / Palladium thermocouples are more costly than Platinum / Platinum Rhodium types but benefit from superior performance, both in terms of stability (less de-calibration) and accuracy.
Gold / Platinum Thermocouples (Au/Pt) offer the best performance but are limited to a maximum temperature of 1000°C.
These Pt/Pd thermocouples offer lower drift than Platinum / Platinum Rhodium (Pt/Pt-Rh)and with higher operating temperatures than Au/Pt. They are suitable for a range of applications including transfer standards.
In addition to developing the novel structural design along with new annealing and construction procedures NPL have established the world’s first ISO 17025 (UKAS) accredited calibration services using metal-carbon eutectic fixed point cells.
