• Measurement based on UV absorption
• Accuracy = 1.5 ppb or 2% of reading
• Resolution = 0.1 ppb (0.0001 ppm)
• Low power consumption; can be battery-operated
• Internal Temperature and Pressure sensors, available in display
• Internal data logger logs ozone levels, temperature and humidity, 10,000 data points
• Interactive menus includes data averaging options of 10 s, 1 m, 5 m and 1 hr
• User settable ranges, ppb, pphm, ppm, μg m-3, mg m-3
• Internal data obtained via USB and RS-232 output
• Analog output (0-2.5 V and 4-20 mA) of ozone concentration in user-selected units
• Two, two-level relay for control purposes, user-settable set-points
• Long-life pump (15,000 hr)
• Federal Equivalent Method EQOA-0914-218

UV Absorption Technology:

Measuring ozone by UV absorption provides the highest accuracy and reliability in ozone monitoring. Unlike electrochemical or metal-oxide sensors, UV absorption directly measures ozone using its natural absorption of ultraviolet light at 254 nm. This method is absolute, meaning it does not drift, degrade, or require frequent recalibration. As a result, UV analyzers deliver long-term stability and precise readings even in demanding industrial or water-treatment environments.

Sensor-based ozone monitors depend on chemical reactions inside the sensor element. These sensors gradually degrade, drift over time, and are affected by humidity, temperature, and the presence of interfering gases. They require periodic recalibration and sensor replacement—adding cost and reducing measurement certainty.  The UV Absorption technology eliminates most all cross-sensitivities from interfering gases in the air.

UV Absorption Technology provides:

• Highest accuracy and repeatability
• No drift and minimal calibration requirements
• Excellent long-term stability
• Minimal, or zero cross-sensitivity from competing gasses in the environment
• Minimal influence from humidity and temperature changes
• Direct, real-time measurement of true ozone concentration

Included Accessories:

The image below illustrates the standard accessories shipped with the UV-106L

Front of UV-106L Ozone Analyzer:

Rear of UV-106L Ozone Analyzer:

Internal view of UV-106L Ozone Analyzer:

Datalogging:

Ozone levels are logged internally with onboard datalogging software.  

Data can be transmitted from the UV-106L via USB or RS-232 directly to your computer.  Data is transmitted via a CSV file.  Up to 10,000 lines of data can be stored on the device.  

• Logged data can include
• Ozone levels 
• Temperature
• Date/Time stamp

Internal Sample Pump:

Internal sample pump creates flow through the UV-10L Ozone Analzyer.  Sample gas flow is measured and can be displayed on the screen to ensure sufficient gas flow is present for accurate ozone measurements.

A flow control valve is built in to adjust flow based on environmental conditions or sample tubing length.  

A low-flow status indicator light on the control face of the UV-106L will illuminate and indicate a condition where sample flow is insufficient for accurate ozone measurements.

The digital flowmeter and flow control valve are unique features to the 2B product line.  These features ensure flow is sufficient for accurate ozone measurements, and any condition outside the requirements creates an alarm or alert to be corrected by the operator.

Ozone Scrubbers:

Internal ozone scrubbers are used to provide zero-gas ozone samples for reference during operation.  Ozone scrubbers also eliminate any ozone from the sample stream.  Therefore, if ozone samples are pulled into the UV-106L no ozone is exhausted from the device, ensuring a safe working space for personnel and equipment.

A zero-gas scrubber is included with the package and provides a tool for manually zeroing the ozone analyzer if necessary.

Calibration:

The UV-106L is shipped with a NIST traceable calibration certificate.

Future calibrations of both Span and Zero can be made easily with the user interface.

External Filter:

The sample gas drawn into the UV-106L should be clean and dry to eliminate interference from dust or humidity. 

An external filter is available to ensure the sample gas is clean and filtered.  The Teflon filter disc is replaceable in the canister, allowing filter changes without the need to disconnect the ozone lines.