Specifications

temperature measurement
660ºC Secondary Standard PRT
Model SSP660 PRTs are assembled using our special wire wound RTD elements and assembled into
inconel sheaths. The SSP660 PRT has the accuracy and long-term stability speci cations you would
 nd in much higher priced secondary standard PRTs.
The SSP660 PRT can be used as a secondary standard in calibration baths, furnaces,  uidized baths,
dry block calibrators and other any other temperature calibration work requiring a high level of
accuracy and repeatability.
Technical Speci cations
Resistance at 0° C: 100 ohms
Temperature range: -200 to 660°C
Calibrated temperature range: -196 to 660°C
Temperature coe cient: 0.003925 Ω /Ω /° C minimum
Stability: R0 typical drift < 0.01°C after 500 hours at 660° C
Thermal shock: R0 typical drift < 0.005° C after 100 times
from 25 to 660°C
Dimensions: 0.25” dia. x 18” L inconel sheath as standard,
custom sizes available
Tolerance at 0° C: ± 0.06%, IEC DIN class A
Lead wires: 4 wire Te on insulated, stranded 22 AGW copper x 6” long
Calibration
Each SSP660 includes an ITS-90 NIST traceable calibration with a+, b+, c+, a- and b- coe cients and
R vs T table. A carrying case is also included.
Calibrated uncertainty (K=2)
-80°C ±0.040°C
-38°C ±0.035°C
0°C ±0.020°C
230°C ±0.030°C
420°C ±0.045°C
660°C ±0.055°C
(Calibrations down to -196°C available upon request.)
Accessories
7002795 660°C Secondary Std 1/4” PRT with carrying case
SSP660 with case
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