CTC AC-211 is the top-of-the-line, premium, high performance accelerometer with typical sensitivity of +/- 5%. When you demand the best, CTC prices beat the rest! For use in portable and instruments and permanent applications.  
Unconditional Lifetime Warranty. If any CTC product should ever fail, we will repair or replace it at no charge. CTC products are the highest quality Vibration Analysis Hardware Products in the World.