Specifications include, but are not limited to: The PM2.5 Automated Filter Weighing System - This self-contained system must be able to accurately weigh polytetrafluoroethylene (PTFE) circular filters, approximately 46.2 mm in diameter and 30-50 µm thickness. This should be proven by the installation and set-up in the Minnesota Pollution Control Agency ambient air monitoring laboratory. Successful set-up is defined as this system running in a production environment. An electronic device capable of running the equipment and software is included. This device must have a display for visualizing data in real-time. The operating system for this device should be the most recent version of Windows that is widely available. The system contains equipment to neutralize static electricity buildup. Analytical Balance - 1.1.4.1 Must have a readability of ± 1 µg and a repeatability of 1 µg. 1.1.4.2 Calibrated at equipment installation. 1.1.4.3 The balance is stationary, grounded, level, and located on a vibration-free base. 1.1.4.4 Must be located within the same conditioning environment as the filters...