The ESR Analyzer is a lab equipment that helps to measure the amount of red blood cells in a person's body. It is often used to help diagnose conditions such as anemia. The ESR machine measures the sedimentation rate, or how fast red blood cells settle in a tube of blood. A high sedimentation rate usually means there is inflammation in the body. The ESR analyzer can also help doctors find out what type of autoimmune disease a person has.