The Erythrocyte Sedimentation Rate (ESR) is a non-specific test that alerts physicians to the possible presence of disease or abnormality in the body. The ESR is determined by measuring, in millimeters per hour, the distance red cells have fallen after separating from the plasma in a vertical sed-rate pipette. The manual test takes 60 minutes to complete. Globe Scientific offers the safest Autozero Westergren ESR products on the market. We have two main products plus an assortment of accessories to choose from.