New PTB Calibration Service for dc SQUID-based Noise Thermometers to Disseminate PLTS-2000

The Physikalisch-Technische Bundesanstalt has started a new calibration service for dc SQUID based noise thermometers according to the PLTS-2000. The thermometers are easy-to use, compact, robust and allow temperature measurements with less than 1% uncertainty in short times in the temperature range from 1 K down to the millikelvin region. New developments in low-temperature thermometry are briefly discussed.