Platinum resistance thermometers are cryogenic temperature sensors for use from 14 K to 873 K, offering high repeatability and nearly constant sensitivity. They are interchangeable above 70 K and conform to IEC 751. The PT-103 and PT-111 variants have standard and AM packages with 2-lead wires. Short-term stability is ±5 mK at 77 K. Magnetic field errors are recommended above 30 K, with typical errors below 0.13% at 300 K up to 19 T. Radiation exposure is recommended. Maximum vacuum is 1 × 10⁻⁴ Pa for standard and 1 × 10⁻⁷ Pa for AM packaging. Thermal response time is 1.75 s at 77 K and 20 s at 273 K. Excitation is typically 1 mA. SoftCal and matched sensor sets up to 50 units are available.
PT-100 platinum resistance thermometers (PRTs) are an excellent choice for use as cryogenic temperature sensing and control elements in the range from 30 K to 873 K (-243 °C to 600 °C). Over this temperature span, PRTs offer high repeatability and nearly constant sensitivity (dR/dT). Platinum resistors are also useful as control elements in magnetic field environments where errors approaching one degree can be tolerated. PRTs are interchangeable above 70 K. The use of controlled-purity platinum assures uniformity from one device to another.
PRTs experience rapidly decreasing sensitivity below approximately 30 K. They should be calibrated in order to achieve maximum accuracy for use below 100 K. The plot illustrates platinum sensor conformance to the IEC 751 curve.
| Lake Shore Cryotronics, Inc. | |
|---|---|
| Product Category | Resistive Temperature Devices (RTD) Elements |
| Product Number | Platinum |
| Product Name | Cryogenic Temperature Sensor |
| Technology | (Platinum) |
