The movements are about 100 micrometers.
As a summary my thoughts are:
Now I would like to choose between 2 options. There is the Hoeben Sensor, that I have linked before. This sensor is mounted on a circuit. The accuracy is a bit higher than 0,1%, as ohmic offset voltage / temperature can be...
I see the point on watt balance and regarding accuracy, it surely can be used. It's just, that it would be easier to buy a sensor, rather than constructing one from scratch.
Well, the solenoid drives an analog electromechanical valve with really small movements.
It is important, that my coil is about 15 * diag=10mm, so watt balance should come out of question.
Which cited Hall Sensor are you referring to? Please note, that the temperature coefficient of the offset can be mostly compensated by the HE 144 Sensor.
Thanks for the answers!
@ VE1BLL: Senis seems ok, I am looking for a cheaper alternative. I found this: http://www.hoeben.com/productdata/Datasheet-HE144-20120601.pdf
As far as I see it, Watt Balance is for mass measurements.
@IRstuff: The problem really has high criteria, they might be...
Hi, I would like to have some suggestions for solenoid valve magnetic field measurement.
Some specifications: sensor diameter must be smaller than 14mm but <6mm preferred.
Accuracy: min. 0,1 % (max. field about 100 mT)
Frequency max. 7 KHz
NMR sensors are too big, fluxgates haven't got the...
