Ivan  Franko  National  University  of  Lviv
1, Universytetska Str.,
79000, Lviv,Ukraine
Tel.: +38-032-2727040  +38-032-2726688
Fax.: + 38-032-2971668
Web: www.lnu.edu.ua

STANDARD NUCLEAR – QUADRUPOLE RESONANCE THERMOMETER
NQRTH (ßÊÐÒ- 5M)

 

 A nuclear – quadrupolar resonance thermometer is one of the most precise and stable contact means of temperature measurement at the modern stage of thermometry development.
A nuclear – quadrupolar thermometer sensor once calibrated keeps the high precision, stability and reproducibility of temperature measurings during the whole exploitation period without the necessity of periodic checking and calibrating.
Such a thermometer could be used for the creation of a working temperature standard (e.g., in the USA, Japan), as well as for precise measurements during scientific explorations, in control and navigation systems, metrological production subdivisions and informational systems.
The temperature dependence of nuclear quadrupolar resonance frequency in Kalium Chlorat crystals makes the basis of a thermometer work principle.
The device consists of a mobile sensor with a detector of nuclear – quadrupolar resonance and a block of analog – digital signal processing with a digital display and an interface providing connection with external devices.
The control of measurement process and the mathematical processing of results is made by a monocrystal microcontroller.
 
 TECHNICAL CHARACTERISTICS
• Measurements range  -  90  423 Ê
• Measurements error    - 1 ìÊ
• Index of heat sensor inertia - 20 ñåê
• Feeding voltage    -  220  10% Â
(possible performance with autonomous feeding) 
• Consumed voltage  -  15 •À
• Sizes    -  200  340  380 ìì

Author: Dr. Anatoliy Lenovenko, Faculty of Electronics, òåë.+38-032-2797763, Ivan Franko National University of Lviv.
 

Contact person:
Bogdan Kotur
Vice-rector for Scientific Research
Prof., Doctor of Science
Tel.: +38-032-2727040
Fax.: +38-032-2616903
E-mail: ndch@franko.lviv.ua