Hi Fred, Good introductory article, but I suspect the author was just googling for data after looking at the freq. ranges listed for the various detector modalities. Many seem way too high for commercial devices ( can you find me a commercial hall effect device that's good to better than 100KHz? ) others too low for theoretical capability ( proton precession doesn't _have_ to be limited to 2 hz, it's a design consideration. ) I was very hopeful with the new magnetoresistive devices that we could see commercial devices in the MHz range, but the linearity sucks so you end up with something only really good for square wave/counter sensing.
Is anyone aware of a commercial H field sensor that can see from DC into the MHz range, that's reasonably linear? Tek sort of solved this problem by making mixed mode detectors, using hall for the low freq. and a coil for the RF. K. -----Original Message----- From: Frederick Sparber [mailto:[EMAIL PROTECTED] Sent: Monday, May 02, 2005 7:08 AM To: vortex-l Subject: Re: Magnetic Field Measuring Devices Very lucid article. The Proton Precession Magnetometer is of particular interest. http://www.autex.spb.ru/download/wavelet/books/sensor/CH48.PDF Frederick
