All correspondence must be made through the Vendor Portal. Specifications include, but are not limited to: 1. Dynamic Shear Rheometer (DSR) 1.1. The DSR shall be supplied with all air filters, flow indicators, communication cables, hoses, and connectors necessary for operation. 1.2. The DSR shall meet all requirements of the current editions of the following standard test methods: 1.2.1. AASHTO T 315, Standard Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer (DSR) 1.2.2. ASTM D7175-08, Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer 1.2.3. ASTM D7405-10a, Standard Test Method for Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer 1.2.4. AASHTO T 350, Test Method for Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer 1.3. The DSR shall have an air bearing-supported, electronically-commutated, synchronous motor drive system for rheological measurements in rotation and oscillation. 1.4. The DSR shall have automatic tool recognition and an intelligent configuration system. 1.5. The DSR shall have a normal force sensor integrated in the air bearing. 1.6. The DSR shall have a fully automatic stand for high precision Automatic Gap Setting (AGS), including automatic zero-gap-setting procedure without user action. 1.7. The DSR shall be of research quality to fulfill current and future non-standardized testing needs