Our precise temperature controllers have
a long history (see e.g. J. Phys. E 10 (1977) 903). They have
been elaborated within a close co-operation with UNIPAN and ULTRASONIC
specialists. Today our temperature controllers are completely digital
with the temperature resolution of 22 bits or higher. This enables the
precision of the temperature control of the order of tenths of milikelvin
or better. With such a high precision the maximal heating power can range
from a few watts to hundreds of watts. The structure of our controllers
is versatile and can be adapted to any requirements of the customers.
We are specialised in precise low heating
rate and constant temperature controls. Fig. 1 presents an example of
scanning temperature at a rate of 2.5 mK/s ±0.04 %. This example
was taken from en experiment performed to measure a sequence of phase
transformations in an aqueous suspension of wheat starch under pressure
of 10 MPa, where the maximum heating power was 80 W.
Fig. 1. An example of a precise scanning temperature at a low rate
with a BGR TECH temperature controller (maximum heating power 80 W).