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

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
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
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
2S: 77 K and 305 K
3S: 77 K, 305 K and 475 K
Calibrated Accuracy
 Typical sensor accuracy2
to 800 K
All other
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 Δ T/T (%) at B (magnetic induction)
Temperature Response Data Table (typical)
 R (Ω) PT-100
S (
20 K 2.29130.0850.74
50 K 9.38650.3601.90
77 K 20.3800.4231.60
150 K 50.7880.4091.20
300 K 110.3540.3871.10
600 K 221.5350.3721.00
800 K 289.7890.3601.00
Click here for expanded response table
Package base parallel to field B
T (K)2.5 T 5 T8 T14 T19 T
4 Recommended for use when T = 30 K
Range of Use
 Minimum limit Maximum limit
PT-10214 K 873 K
PT-10314 K873 K
PT-11114 K673 K

PT-100 Series I


Physical Specifications
250 mg2, platinum Partially filled powderPlatinum winding partially supported by a high temperature alumina powder inside a ceramic tube, platinum lead wires NoYes
PT-103120 mg2, platinum 95%, rhodium 5% alloyFully filled powderPlatinum winding fully supported by a high temperature alumina powder inside a ceramic tube, platinum/rhodium lead wiresSomewhatYes
PT-11152 mg2, platinumSolid glassOne platinum band wound onto a glass tube which is protected from the environment by a layer of glaze, platinum coated nickel lead wires YesNo
Platinum Calibration Ranges

Add -LN* for matching PT Sensors to ±0.1 K at 77 K
**Must be purchased with all matching sensors, as well as with the sensor to be matched (either SoftCal or full calibration, e.g., 2S or 14L)


  1. Upper temperature of AL and AM packages is limited to 800 K.
  2. If your application requires more than one platinum resistor, up to five platinum resistors can be matched with one another to within ±0.1 K at liquid nitrogen temperature with the purchase of only one calibration.
    For larger quantities, or for different requirements, consult Lake Shore. At the time of order, add -LN to the model number.
    Example: PT-102-14L-LN is a PT-102-LN RTD with a calibration range of 14 K to 325 K that is matched with at least one other uncalibrated PT-102 to within ±0.1 K at liquid nitrogen temperature.
  3. For metrological applications below 30 K, use a germanium RTD. PT-100 sensors are not useful below 14 K for metrology and are of limited use below 30 K for temperature control, due to rapid decline in sensitivity.
  4. For use above 500 K, anneal at Tmax +10 °C for 4 h.