• High precision turn key temperature controlsystem• Dedicated sample cell for dielectric andimpedance spectroscopy included• Designed for easy, safe and fully automatic
operation• Wide temperature range: ­160°C to +400°C• 0.01°C stability due to 4 channel Quatro controller
featuring PID control algorithms with non­linear
extensions• Includes 4 channel controller QUATRO, stabilized
power supplies, cryostat with sample cell, gas
heating, liquid nitrogen cooling system, vacuum
systemNovocontrol Technologies
GmbH & Co. KG
Aubachstr. 156410 Montabaur
GermanyPhone: +49 2602 9196690
Fax:+49 2602 91966933
e­mail: novo@novocontrol.de
web: http://www.novocontrol.de

Quatro Cryosystem

U n i ve r s a l T e m p e r a t u r e
C o n t r o l Sy s t e mf o r M a t e r i a l s A na l ys i s

NOVOCONTROL

Quatro Cryosystem

Cryosystem
The Quatro Cryosystem is a highquality turn key temperature con­trol system for applications in ma­
terials research. A sample cell
particularly suited for dielectricand impedance spectroscopy isincluded. The system has beendeveloped to set or change thetemperature of the sample under
test with high accuracy and re­
producibility. The system is modu­
lar and may be combined with
any Novocontrol dielectric or im­
pedance analyzer.
The Quatro Cryosystem is de­signed to provide easy, safe andfully automatic operation, en­abling computer­controlled longtime experiments over several
days without supervision.

Applications
Applications
Temperature control extends theversatility of dielectric and im­pedance spectroscopy and in­creases the significance of theobtained results. Various key ma­
terials properties, e.g., molecularrelaxations, conductivity, phaseseparation, phase transitions, ac­tivation energy, glass temperat­
ure, rate of blending, purity,ageing, curing, either show
marked temperature depend­ence or are only accessible
through temperature­dependentmeasurements.

Principle of operation: A heating element builds up and controls aspecified pressure in the liquid nitrogen Dewar vessel in order to cre­
ate a highly constant nitrogen stream. The pressure and temperat­
ure in the Dewar vessel are measured by two channels of theQuatro controller. The nitrogen stream, heated to a temperatureappropriate for the desired sample temperature, flows directly
through the sample cell mounted in the cryostat. The gas andsample temperatures are measured by the two remaining channelsof the Quatro controller. The four­channel design allows highly
stable, fast and safe system operation.

Purge Gas Option

FeaturesAn economical way to operate
the QUATRO system without liquid
nitrogen is provided by the purge
gas option. The temperature
range in this mode is limited to25 °C ... 400 °C.

• high precision turn key
temperature control system• temperate range ­160°C to400°C• temperature ramps from0.01°C/min to 20°C/min• 0.01°C temperature stability• temperature overshooting after
set point step typically < 0.2°C• stabilization times typicallybelow 8 minutes (for 0.1°Cstability)• low nitrogen consumption due
to automatic pressure ­temperature adaptation• automatic adaptation ofcontroller parameters (selftune)• 4 channel microprocessor
controller with 24 bit ADC andIEC communication port
• vacuum­isolated cryostat andnitrogen lines

Stabilization characteristics of the sample temperature (processvalue) compared to temperature set point (step function). Set point
step after sample temperature stabilization to 0.1°C accuracy.