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8508A-SPRT
Standard Platinum Resistance Thermometer
Highlights
- Range to aluminum point (660 °C )
- Inconel™ and platinum sheaths guard against contamination
- Less than 8 mK/year drift
- Many calibration options available including by fixed point
- Fifth wire provides shield ground
The 8508A-SPRT Extended Range Metal-Sheath SPRT has been designed and manufactured by Fluke Calibration's primary standards metrologists, to complement the Fluke 8508A Reference Multimeter’s precision PRT temperature function.
| Specifications | |
| Temperature Range | –200 °C to 670 °C |
| Nominal RTPW | 25.5Ω (± 0.5Ω) |
| Current | 1 mA |
| Resistance Ratio | W(302.9146 K) ≥ 1.11807 W(234.3156 K) ≤ 0.844235 |
| Sensitivity | 0.1 Ω/ °C |
| Drift Rate | < 0.008 °C/year (< 0.003 °C/year typical) |
| Repeatability | < 1 mK |
| Self-heating at TPW | < 0.001 °C under 1 mA current |
| Reproducibility | ± 0.001 °C or better |
| RTPW Drift After Thermal Cycling | < 0.001 °C |
| Diameter of Pt Sensor Wire | 0.07 mm (0.003 in) |
| Lead Wires | Four sensor wires plus grounding wire |
| Protective Sheath | Inconel |
| Diameter: | 5.56 mm ± 0.13 mm (0.219 in ± 0.005 in) |
| Length: | 482 mm (19 in) |
| Insulation Resistance | > 100 MΩ at 661 °C > 1000 MΩ at 20 °C |
|
Calibration |
Accredited calibrations from Fluke Calibration included |
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