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

Download

IMEKO-TC3-2007-064u.pdf

DOI

-

IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

Back to the proceedings