PT-100 Series platinum resistance thermometers are an excellent choice for use as cryogenic temperature sensing and control elements 30 K to 873 K (-243 °C to 600 °C). Over this temperature span, platinum offer high repeatability and nearly constant sensitivity (dR/dT). They are also useful as control elements in magnetic field environments where errors approaching one degree can be tolerated. These sensors are interchangeable above 70 K. The use of controlled-purity platinum assures device uniformity.
| Temperature range | 14 K to 873 K |
| Resistance range | 1 kΩ to 20 kΩ |
| Calibration curve | Calibrated and interchangeable options |
| Accuracy | ±10 mK at 30 K |
| Short-term stability | ±5 mK at 77 K |
| Magnetic fields | Fair above 30 K |
| Radiation | Recommended |
| Packages | Standard, AM |
| Temperature controller | 336, 335 |
In what cryogenic applications are platinum sensors used?
Platinum resistance thermometer (PRT) sensors are highly useful in various applications due to their low price and usefulness in higher temperature systems. With operating ranges from liquid nitrogen temperatures (77.35 K) to many hundreds of degrees Celsius, they offer good sensitivity over the entire range. Lake Shore's 100 Ω PRTs adhere to the ISO standard temperature curve but have also been characterized for viable operation down to 14 K, making them the lowest temperature PRTs available. Above 70 K, PRTs offer high repeatability and nearly constant sensitivity (dR/dT). Because of their high reproducibility, they are used in many precision thermometry applications.