As most of you will already be aware, shear design accelerometers are better than compression design ones. All the U.S. manufacturers CTC (Connection Technology Center, New York, U.S.A.), Wilcoxon, (MD, U.S.A), PCB-IMI (Buffalo, U.S.A.) completely dropped production of compression accelerometers. Yet there are still manufacturers only producing the compression design ! Here at VibraSens, we manufacture both types, so you can compare like with like. Our annular shear design model 101.21 sells for just  € 64 ($ 92 // £ 57 // CAD 100). At prices like these, if you’re still buying compression accelerometers, it’s high time to move ahead into the 21st century…