Model Dual Beam Ozone Monitor
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Model Dual Beam Ozone Monitor | 2.B Tech

The Model 205 Dual Beam Ozone Monitor makes use of two detection cells to improve precision, baseline stability, and response time. 


With its double beam, measurements of UV light intensity Io (ozone-scrubbed air) and I (unscrubbed air) are carried out simultaneously. Combined with other improvements, this made it possible to reduce the time between ozone measurements to 2 seconds, making our instrument the fastest UV-based ozone monitor on the market, while still retaining the small size, weight, and power requirements of our popular Model 202 Ozone Monitor. 

Features :

  • Quiet long-life internal air pump (now standard)
  • Low power consumption (~8 watt)
  • Internal data logger (EEPROM), logs 16,383 lines of data
  • Real-time clock
  • Both serial and user-scalable analog voltage outputs (4-20 mA current output optional)
  • Flash card memory (SD card) for virtually unlimited, portable data storage
  • Three 0-2.5 VDC analog inputs for logging other measurements, such as external temperature, pressure, and humidity
  • Convenient user interface to microprocessor, including calibration parameters (gain and zero)
  • Selectable measurement time of 2 s or data averaging times of 10 s, 1 min, 5 min and 1 hr (custom averaging times available)
  • DewLine™ for elimination of any water vapor interference, a unique feature of 2B Tech instruments
  • Dual beam feature allows for heightened precision and improved baseline stability for applications where high spatial resolution is required.

Options :

  • GPS for continuous logging of latitude, longitude, and altitude (for 10-s data mode and above)
  • Rechargeable lithium-ion battery provides 12 hours of continuous operation
  • External particle filter
  • Serial-to-USB adapter
  • 4-20 mA analog current output
  • Bluetooth for wireless data transmission
  • Low-temperature package for operation to -20 degrees C (pump, lamp heater)
  • High-altitude upgrade (pressure sensor for use up to 25 km altitude)
  • Extra long-life, low temperature internal air pump
  • Low-power option for even lower power consumption
  • Rack-mount case configuration

Because of its small size, it can be transported anywhere, and can be calculated very quickly, for example on a light rail platform in Utah, yielding enlightening (and perhaps counter-intuitive) results on ozone levels near busy highways. You can download the application note.