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@@ -16,7 +16,7 @@ It is based on a discrete electrostatics solver (shown below), and also document
 
 ## Magnetic
 
-<a href='http://web.cba.mit.edu/sam/kiri/doc/loadcell.html'>1 DOF Magnetic Load cell</a>
+Another proximity measurement uses the magnetic field instead of the electric field.  Integrated circuits are available with extremely sensitive magnetostrictive, magnetorestive, and hall effect sensors.  Using differential pairs of these elements, very low-cost, non-contact rotary and linear encoders can be made.  <a href='http://web.cba.mit.edu/sam/kiri/doc/loadcell.html'>This page</a> documents experiments with a 1 DOF magnetic load cell, based on the Austrian microsystems AS5510 IC, which boasts 500nm resolution for $1.41 (Q: 100).
 
 <img src='prior/as5011-loadcell.jpg' width=40%>