F-8290 Opacity / Dust Monitor

The F-8290 operates according to the principle of autocollimation (double-pass), meaning the light beam crosses the measuring path twice. The system measures and evaluates the attenuation of the light beam caused by the dust in the measuring path. The two main features that separate the F-8290 from older designs of the competition are the Super Wide Band Diode and the single photodetector design.

The Super Wide Band Diode has a spectral response of 400 to 700 nm and is modulated with no moving parts. This modulation prevents influences from other light sources such as sunlight. The broadband light source minimizes the effects of changing particle sizes when measuring dust concentration. The calibration audit filters typically used are measured over the 400 to 700 nm range. The broad-spectrum light source will give a more accurate measurement of these filters when compared to results from a narrow-band LED system.

A control cycle is initiated periodically to ensure proper operation of the system. During this cycle, the F-8290 automatically measures and displays the zero point, window contamination, upscale calibration value, and stack taper ratio. If necessary, the subsequent measured values will be corrected for window contamination. If the correction exceeds the selected value, a warning signal will be generated. An integrated filter holder in the transceiver and a local display also allows quick service, quarterly audits, or maintenance by a single technician.

• EPA Compliant
  • exceeds PS1 and ASTM Standards
  • CPS-001 for low level opacity
  • Procedure 3 for 40 CFR60 App. F
• In situ, double-pass measuring principle for continuous opacity monitoring
• Long-life, solid state light source
• Optimal evaluation of measuring signals due to the wide band spectrum of the Super Wide Band Diode (SWBD). Measurement is more stable than with conventional LED systems
• Liquid crystal display in opacity or optical density, calibration capability in mg/m3 or gr/dscf
• Automatic zero and span check with correction for window contamination
• Optics and electronics in a hermetically sealed housing
• Simple alignment without special tools
• Reduced maintenance due to an advanced purge air system
• Programming via remote display unit
• Two independent analog output signals available with adjustable ranges
• Integrated quarterly audit device and stack display for single person calibrations
• Fiber optic communication capability