Platinum RTDs - Technical Specifications - Lake Shore Cryotronics, Inc.

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Platinum RTDs

Specifications

Standard curve IEC 751

Recommended excitation 1 mA

Dissipation at recommended excitation
100 µW at 273 K

Thermal response time
PT-102 & PT-103: 1.75 s at 77 K, 12.5 s at 273 K; PT-111: 2.5 s at 77 K, 20 s at 273 K

Use in radiation Recommended for use in ionizing radiation environments – Click here for more information

Use in magnetic field Because of their relatively low magnetic field dependence above 30 K, platinum sensors are useful as control elements in magnetic field applications when some error can be tolerated – Click here for more information

Reproducibility⁴ ±5 mK at 77 K ¹ Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks
from 305 K to 77 K

SoftCal™ Accuracy

	30 K to 305 K	305 K to 400 K	400 K to 475 K	475 K to 475 K	500 K to 670 K
2 S	±0.25 K	±0.9 K	±1.3 K	±1.4 K	±2.3 K
3 S	±0.25 K	±0.25 K	±0.25 K	±1.4 K	±2.3 K

Calibrated Accuracy

	Typical sensor accuracy²		Long-term stability³
	Calibrations to 800 K	All other calibrations	Long-term stability³
30 K	±10 mK	±10 mK	—
77 K	±12 mK	±12 mK	±10 mK
305 K	±23 mK	±23 mK	—
400 K	±210 mK	±41 mK	—
500 K	±210 mK	±46 mK	—
800 K	±310 mK	—	—

² [(Calibration uncertainty)² + (reproducibility)²] ^0.5 for more information see Appendices B, D, and E
³ If not heated above 475 K -long-term stability data is obtained by subjecting sensor to 200 thermal shocks from 305 K to 77 K

Typical Magnetic Field-Dependent Temperature Errors⁴ ΔT/T (%) at
B (magnetic induction)

Temperature Response Data Table (typical)
	R (W)	PT-100 S (W/K)	(T/R) (dR/dT)
20 K	2.2913	0.085	0.74
50 K	9.3865	0.360	1.90
77 K	20.380	0.423	1.60
150 K	50.788	0.409	1.20
300 K	110.354	0.387	1.10
600 K	221.535	0.372	1.00
800 K	289.789	0.360	1.00
Click here for expanded response table

Package Base Parallel to Field B
T(K)	2.5 T	5 T	8 T	14 T	19 T
20	20	–	100	250	–
40	0.5	1.5	3	6	8.8
87	0.04	0.14	0.4	1	1.7
300	-0.01	0.001	0.02	0.07	0.13
⁴ Recommended for use when T ≥ 30 K

Range of Use
	Minimum Limit	Maximum Limit
PT-102	14 K	873 K
PT-103	14 K	873 K
PT-111	14 K	673 K

PT-100 Series Interchangeability


Physical Specifications
	Mass	Lead type	Internal atmosphere	Materials used
PT-102	250 mg	2, platinum	Solid	Platinum winding partially supported by a high temperature alumina powder inside a ceramic tube, platinum lead wires
PT-103	120 mg	2, platinum	Solid
PT-111	52 mg	2, platinum	Solid	One platinum band wound onto a glass tube which is protected from the enviornment by a layer of glaze, platinum coated nickel lead wires

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