Specifications include, but are not limited to: provide the Teledyne Model API T640x [100 - 230 VAC, 50/60Hz] Continuous Ambient PM2.5, PM10, PM10-2.5 Particulate Mass Monitor, or a DHEC approved equivalent in accordance with the requirements stated herein; 3.1.1. Monitor must be a designated EPA reference or equivalent method for PM2.5, PM10, or PM10-2.5, meeting or exceeding performance specifications in 40CFR § 53. 3.1.2. Use the measurement principle of broadband spectroscopy using 90° white-light scattering with polychromatic LED. 3.1.3. Mass measurement and display resolution of 0.1 µg/m3 . 3.1.4. Precision + 0.5 µg/m3 (1-hr average). 3.1.5. Lower detectable limit must be <0.1 µg/m3 (1-hr average). 3.1.6. Mass concentration accuracy exceeds U.S. EPA PM10 FEM and Class III FEM PM2.5 performance requirements for additive and multiplicative bias compared to FRM samplers. 3.1.7. Flow rate 5.0 lpm sample flow (standard) and 11.67 lpm bypass flow (T640x option). 3.1.8. Flow accuracy within + 1%. 3.1.9. Operating temperature 0 - 50°C non-condensing. 3.1.10. Ambient temperature -40 - 60°C. 3.1.11. Ambient Relative Humidity 0 – 100%. 3.1.12. Sample Humidity Control 24VDC, 90W (max) heater controlled to 35% RH. 3.1.13. Internal sample pump (for 5 LPM sample flow) with in-line DFU filter.
