Product

Model 211 Scrubberless Ozone Monitor

The new Model 211 Scrubberless Ozone Monitor uses the proven ultraviolet (UV) absorption method in combination with our patented (US Patent No. 8,395,776 B2) gas-phase scrubber technology to measure ozone virtually free of interferences. The instrument is ideally suited for measurements of ozone in heavily polluted air where interference is likely from particulates, mercury, or VOCs.

The Model 211 combines the stability of our proven dual beam ozone monitors with our selective scrubber technology to provide accurate ozone measurements in the most polluted air. The enhanced optical path length of 30 cm provides a precision of better than 0.5 ppb for 10-second measurements, and the instrument can output new ozone measurements as often as every 2 seconds. The Model 211 now comes with SD flash card memory as a standard feature.

The Model 211 Scrubberless Ozone Monitor has been designated by the EPA as a Federal Equivalent Method (FEM): EQOA–0514–215.

Like our Model 205 Ozone Monitor, the Model 211 is actually dual beam, with a measurement of the transmission of UV light through ozone-depleted air being made simultaneously with a measurement of UV light passing through unscrubbed air, thus increasing the precision and baseline stability of the instrument.

The Model 211 allows remote instrument operation via RS-232, choice of averaging time (2 s to 1 hr), analog voltage output (0-2.5 V), optional analog current output (4-20 mA), and internal data logger. Our data display and graphing software allows continuous display of data which can be saved for offline analysis

Features:
  • Interference-free measurement of ambient ozone
  • DewLine™ for elimination of water vapor interference, a unique feature of 2B Tech instruments
  • Inexpensive, simple, and robust instrument design in a 19” rack mount enclosure
  • Internal data logger
  • SD flash memory for virtually unlimited portable data storage
  • Dual beam, long path (30 cm) optical bench with high precision (< 0.5 ppb)
  • NIST-traceable calibration (calibration suggested annually)
  • Internal long-life sample pump (20,000 hours)
  • EPA Federal Equivalent Method (FEM) for compliance monitoring (EQOA–0514–215)
  • Candidate to become a new EPA Federal Reference Method (FRM)
  • Convenient user interface, including remote operation via RS-232 communication
  • Internal NO generator from non-toxic, non-corrosive nitrous oxide (N2O)
  • Very low NO concentration used in comparison to ozone monitors based on NO chemiluminescence
Specifications