Lake Shore Cryotronics Inc., Westerville, OH, offers the Model 3708 eight-channel low-noise preamp/scanner for use with its Model 370 AC resistance bridge for ultra-low-noise AC resistance measurements. The combination offers a low-voltage noise floor of 2 nVRMS/rt.Hz and allows you to perform low-voltage Hall effect measurements. Unused leads are left open to allow Hall effect sequencing.
Preamp/Scanner from Lake Shore Cryotronics
Lake Shore Cryotronics Inc.