Bartington Helmholtz Coil Systems
MEASUREMENT & MONITORING
Bartington ’ s range of Helmholtz Coils provides solutions for a variety of industrial and research applications , where creation of an accurate and controllable known magnetic environment is important . For example , many of today ’ s devices include compasses for navigation , such as mobile phones , satnav systems , and rangefinders . Our Helmholtz Coils are idea for calibrating these devices accurately , enabling maximised performance and improved accuracy of the data obtained from these compasses .
Our range of coils is available with diameters of 350mm ( HC16 ), 500mm ( HC1 ®) or 1m ( HC2 ®). They can be supplied on their own , or with our Power Amplifier ( PA1 ) and Control Unit ( CU1 ). The CU2 Module allows for closed-loop compensation to take place for improved field stability , especially over slowly varying ambient field changes . We also offer a compatible National Instruments acquisition card and LabView™-based package , which enable a turnkey solution for software control of your Helmholtz Coil system . from distortions in the Earth ’ s magnetic field . For the HC1 ®, you may specify the number of axes , and hence pairs of coils , required . The two-axis version is available in any combination ( X + Y , X + Z or Y + Z ), which may be specified when placing your order . The HC2 ® coils are provided in flat-pack form for easy shipping and assembly at your convenience .
In addition , Ferronato Helmholtz Coils with 1.3 and 2m diameters from Serviciencia are also available , and are compatible with our control system .
When developing new magnetic sensing technology , our Helmholtz Coils and reference sensors are invaluable in ensuring the new sensors are calibrated and tested appropriately . Our Mag-13MS three-axis magnetic field sensor is an ideal high precision reference sensor for field measurements .
Each pair of coils generates a homogeneous magnetic field in one specific axis : X , Y or Z . The coils can be calibrated to add or subtract www . bartington . com
Time-Domain NMR Spectrometer for Materials Studies & Process Measurement & Control
Time-domain NMR Relaxation is an extremely useful quantitative technique for material science and process measurement & control . This time-domain NMR spectrometer can be used to study solids such as polymers and porous materials . This gives data on sample component masses and movement of the atoms and molecules , which lead to qualities which are variously described as mobility , dynamics , stiffness , viscosity or rigidity .
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Here are some typical measurements monitoring the setting of two-part epoxy resins over more than a day , measuring the changes in the motion of the atoms in the polymers as the setting process proceeds and the resins become more rigid . There are many such systems where this NMR spectrometer can provide useful process information . For temperature dependent systems , a Peltier thermo-electrically cooled variable-temperature probe is available , that precisely controls temperature from -35C to + 80C , with additional CO2 gas-assist available down to -80C .
www . nmrspectrometer . labtools . com www . Lab-Tools . com Lab-Tools Ltd .( nanoscience ) + 44 ( 0 ) 7805 437 241
ATACAM ALM1390
ATACAM AL1390 Call for more information or a demonstration , or visit www . atacam . co . uk
ATA Engineering Processes Ltd ATA House , Unit B , Boundary Way , Hemel Hempstead , Herts , HP2 7SS t : 01442 264411 e : sales @ ataeng . com www . ataeng . com
Issue 50 PECM 83