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| Brand | FPI |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer | FPI (Original Equipment Manufacturer) |
| Instrument Type | Online Aerosol Organic Carbon/Elemental Carbon Analyzer |
| Measurement Principle | Thermal-Optical Transmittance (TOT) or Thermal-Optical Reflectance (TOR) |
| Compliance | Designed for ASTM D7520, IMPROVE_A, NIOSH 5040-compatible protocols |
| Sample Inlet | Standard PM2.5 or PM10 inlet with heated line (optional) |
| Detection Method | Laser transmittance/reflectance monitoring during thermal desorption |
| Flow Control | Proportional solenoid valves + mass flow controllers (MFCs) |
| Furnace Construction | High-purity alumina ceramic furnace bricks with ceramic fiber-insulated heating elements |
| OC/EC Split Point Determination | Automated optical carbon charring correction algorithm |
| Brand | FPI (Focus Photonics Inc.) |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | OEM Manufacturer |
| Instrument Type | Aerosol Black Carbon Analyzer |
| Measurement Principle | Optical Attenuation (Filter-Based Transmission) |
| Wavelength Channels | 7-channel (370, 450, 520, 590, 660, 880, 950 nm) |
| Primary Output | Black Carbon Mass Concentration (µg/m³) and Wavelength-Dependent Absorption Coefficient (Mm⁻¹) |
| Compliance | QX/T 68–2007 (China Meteorological Administration Standard) |
| Flow Control | Integrated Precision Mass Flow Controller |
| Detection System | Dual Photodetector Correction + Charge-Integrating ADC Architecture |
| Data Output | Real-time, Continuous, On-line |
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