MicroSensor Company provides calibration services for all types of cryogenic temperature sensors in temperature range from 2.0 K to 325 K.

MicroSensor calibrations are based on the International Temperature Scale of 1990 (ITS-90) using the iron-rhodium reference thermometers.

The calibration process is computer-controlled and calibration data collected automatically. The calibration facility provides stable and uniform temperatures (±0.005 K) in the course of sensors calibration. The precise temperature for each data point is determined. Once temperature has stabilized, an appropriate direct excitation current is applied to the thermometer, and the resultant voltage is measured. For the resistance thermometers, the sensor excitation voltage is maintained between 5 mV and 15 mV (or between 50 mV and 150 mV for different versions of thermometers) in order to avoid self-heating of sensor in the temperature range from 2.0 K to 325 K. Successive voltage readings taken with the current applied in opposite polarities are averaged together to eliminate thermal EMFs from the data obtained. For diode temperature sensors, the 10 microamps or/and 100 microamps direct excitation current are applied.

Ice-point reference without the ice. Hart Scientific 9101 Zero Point Calibrator (273.15 K, 0 °C, 32 °F) with stability of ±0.005 °C (NIST-traceable calibration) is used for calibration and investigation of temperature sensors.

The superconducting magnet that produces 0 — 8 T in the 1.8 — 4.2 K temperature range is used for calibration and investigation of temperature and magnetic field sensors.