PECM Issue 51 2021 | Page 87

MEASUREMENT & MONITORING

Bartington Helmholtz Coil Systems

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 ideal 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 enables
a turnkey solution for software control of your Helmholtz Coil system .
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 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 . www . bartington . com / bartington-helmholtz-coils
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 information on qualities which are variously described as mobility , dynamics , stiffness , viscosity or rigidity .
This highly compact Mk3 low-field time-domain NMR relaxation spectrometer provides physical information on liquid and solid samples in the lab and in the field , at a size , cost and complexity typically 1 / 10th to 1 / 100th of that of typical high field chemical analysis NMR systems .
The Graphical User Interface has extensive software for on- and off-line analysis of material and sample data , and built-in modules for process on-line monitoring and control . This spectrometer is robust , and compact enough for use in the field . It has a 3D printed solid metal case , gold flashed , and weighs just under 1kg .
+ 44 ( 0 ) 7805 437241 nmrspectrometer . lab-tools . com www . Lab-Tools . com
Electric Vehicle Charger : Power
We are truly at the beginning of the electric car age . With countries around the world introducing mandates to cut the number of diesel and petrol cars . Public car chargers are going to be scheduled as part of the strategy .
The first hurdle system designers will have to overcome when developing and deploying public EV chargers is the huge power requirement .
There are three main types of EV charging stations : AC Level 1 , AC Level 2 and DC fast charging . AC Level 1 chargers provide 120V charging to deliver up to 1.9kW of output power . AC Level 2 chargers provide 240V charging to deliver anywhere from 3kW to 19kW .
Colloquially known as a sort of “ level 3 ” of charging stations , Direct Current Fast Chargers ( DCFCs ) are designed to fill an EV battery to 90 % in as low as 20 minutes .
www . componentsbureau . com / market-sectors / transportation / electricvehicle-ev-chargingstations
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