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Platinum specifications

General

Standard curve IEC 751

Recommended excitation 1 mA

Dissipation at recommended excitation 100 µW at 273 K

Thermal response time 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 — 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 — more information

Reproducibility¹ ±5 mK at 77 K

Soldering standard J-STD-001 Class 2

¹ Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks from 305 K to 77 K

Range of use

	Minimum limit	Maximum limit
PT-103	14 K	873 K²
PT-111	14 K	673 K

² Maximum temperature limited to 800 K if using AL or AM packages
Note: For use above 500 K, anneal at T_max +10 °C for 4 h

SoftCal™ accuracy

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

2S: 77 K and 305 K
3S: 77 K, 305 K and 475 K

Calibrated accuracy

	Typical sensor accuracy³		Long-term stability⁴
	Calibrations to 800 K	All other calibrations	Long-term stability⁴
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	—	—

³ [(Calibration uncertainty)² + (reproducibility)²]^0.5 for more information, see Appendices B, D, and E

⁴ 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

Temperature response data table (typical)

	R (Ω)	PT-100 S (Ω/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

PT-100 Series interchangeability

Physical specifications

	Mass	Lead type	Internal atmosphere	Materials used	Maximum vacuum	Non-magnetic packaging
PT-103	120 mg	2, platinum 95%, rhodium 5% alloy	Fully filled powder	Platinum winding fully supported by a high-temperature alumina powder inside a ceramic tube, platinum/rhodium lead wires	1 × 10^-4 Pa	Yes
PT-111	52 mg	2, platinum	Solid glass	One platinum band wound onto a glass tube, which is protected from the environment by a layer of glaze, platinum-coated nickel lead wires	1 × 10^-7 Pa	No

Platinum calibration ranges

See the matched platinum sensor page for instructions on matched part numbers

Typical magnetic field-dependent temperature errors⁴ Δ T/T (%) at B (magnetic induction)

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