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Temperature control in the µK range for density measurements

Horst Bettin
  • Abstract:
    A temperature controller for density measurements is presented that allows temperature stabilities of about 10 µK to be achieved near 20°C. The controller consists of a function generator, a thermistor in a Wheatstone bridge, a differential amplifier, a lock-in amplifier, a PC and a power source for the heater. Two of the controllers are also used to stabilize an electronic temperature fixed point at 20°C that will help to compare the realizations of the 20°C temperature in different laboratories with an uncertainty below 0.5 mK.
  • Keywords:
    density measurements, temperature controlling, temperature regulation, electronic temperature fixed point
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  • DOI:
    _unreg_tc3-2007.064

Event details:

  • IMEKO TC:
    TC3
  • Event name:
    Cultivating Metrological Knowledge
  • Title:

    20th Conference on Measurement of Force, Mass and Torque (together with 3rd TC16 Conference on Pressure Measurement & 1st TC22 Conference on Vibration Measurement)

  • Place:
    Merida, MEXICO
  • Time:
    27 November 2007 - 01 December 2007