Model 202 Ozone Analyzer

The Model 202 Ozone Monitor will give accurate and precise measurement in low ppb with a precision of ~1.5 ppb and read up to 250 ppm.  This Monitor uses UV light absorption at 254nm for ozone measurement.

4 weeks

The 2B Technologies Model 202 Ozone Monitor™ is designed to enable accurate and precise measurements of ozone ranging from low ppb (precision of ~1.5 ppb) up to 250,000 ppb (0-250 ppm) based on the well-established technique of absorption of UV light at 254 nm.  Flash card memory and a quiet, long-life internal air pump are now provided standard on the Model 202 Ozone Monitor.  The Model 202 Ozone Monitor™ is lightweight (5.5 lb., 2.5 kg.) and has a low power consumption (12V DC, 0.60 amp, 7.2 watt) relative to conventional instruments and is therefore well suited for applications such as:

     -Vertical profiling using balloons, kites, RPVs and light aircraft where space and weight are highly limited

     -Long-term monitoring at remote locations where power is highly limited

     -Urban arrays of ground-based detectors

     -Personal exposure monitoring for studies of health effects of air pollutants

     -Environmental health and safety monitoring

     -Laboratory studies of the effects of ozone exposure on materials and organisms



     -GPS for continuous logging of latitude, longitude, and altitude (for 10-s data mode and above)

     -Bluetooth for wireless data transmission

     -Rechargeable lithium-ion battery provides 12 hours of continuous operation

     -External particle filter

     -Serial-to-USB adapter

     -Cold-weather package (pump, lamp heater for use down to -20 degrees C)

     -High-altitude upgrade (pressure sensor for use up to 25 km altitude)

     -Low-power option

     -Extra-long-life internal air pump

     -4-20 mA analog current output

     -Rack-mount case configuration


System Includes:

     -Model 202 Ozone Monitor with quiet, long-life internal air pump

     -AC Power Adapter (100-240 VAC to 12 VDC) with Country-Specific Plug

     -Flash Card Memory for virtually unlimited data storage

     -SD Card

     -SD Card Reader

     -Cigarette Lighter Adapter

     -Zeroing Cartridge

     -Operation Manual on USB Stick

     -Calibration Data and NIST-Traceable Calibration Certificate

     -Instrument Birth Certificate

     -One-Year Warranty



Measurement Principle

UV Absorption at 254 nm

Federal Equivalent Method (FEM)

Yes, EQOA-0410-190

Linear Dynamic Range

0 to 250 ppm


0.1 ppb

Precision (1σ; rms noise)

Greater of 1.5 ppb or 2% of reading


Greater of 1.5 ppb or 2% of reading

Limit of Detection (2σ)

3.0 ppb (in 10-s measurement mode)

NIST-Traceable Calibration


Measurement Interval

10 s (Data averaging options: 1 min, 5 min, 1 hr)

Flow Rate (nominal)

~1 Liter/min

Flow Rate Requirement

>0.6 L/min

Baseline Drift

< 2 ppb/day
< 5 ppb/year

Sensitivity Drift

< 1%/day
< 3%/year

Measurement Time, Frequency

10 s, 0.1 Hz

Response Time, 100% of Step Change

20 s, 2 points

Averaging Times

1 min, 5 min, 1 hr

Internal Data Logger Capacity

16,383 lines (10-s meas. = 1.9 days; 1-min avg = 11 days; 5-min avg = 1.9 mo;
1-hr avg = 1.9 yr)

SD Card Logger Capacity

Minimum 2 GB (> 5-year capacity for 10-s measurement mode)

Ozone Units

ppb, ppm, pphm, µg m-3, mg m-3

Pressure Units

mbar, torr

Temperature Units

°C, K

T and P Corrected


Operating Temperature Range

0 to 50 °C standard; optional -20 to 50 °C with low temperature modifications (pump and lamp heater cold-weather package)

Operating Altitude Range

~0-13.5 km (150-1,013 mbar) standard; optional ~0-25 km (30-1,013 mbar) with upgraded pressure sensor

Power Requirement;
Supplied by battery or 110/220 VAC Power Pack

11-14 V DC or 120/240 V AC, 600 mA, 7.2 watt (6.2 watt with cell heater unplugged)


3.5 x 8.5 x 11 inches (9 x 21 x 29 cm)


5.5 lb (2.5 kg); 2.8 lb (1.3 kg) without instrument case

Analog Inputs for Internal Logging of Other Instruments

3 Analog Inputs, 0-2.5 V; For example could log external T, P and RH

Data Outputs

RS232, 0-2.5 V Analog, LCD Display: (Optional 4-20 mA Current, External USB Converter; request quote)

Data Transfer Baud Rates

2400, 4800, 19200

Output Ranges

User-Defined Scaling Factor in Menu



Quiet Long-Life Internal Air Pump


Flow Meter



Battery; External Particle Filter; Serial-to-USB Converter; GPS (for 10-s data mode and above); Bluetooth; 4-20 mA Current Output; Cold-Weather Package (pump, lamp heater); High-Altitude Upgrade; Extra-Long-Life Internal Air Pump; Low-Power Option; Rack-Mount Case Configuration

Upgradable to Model 205 Dual Beam




We highly recommend replacing the filter frequently to prevent contamination of the flow path by particulate matter. 


Picture of Filter Housing: Product: FILTERHS



Model 202 Brochure

Model 202 Manual

More Information
Manufacturer 2B Technologies
Call For Price No
Gas Ozone (O3)
Resolution 0.1 ppb
Response Time 20 seconds
Sensor type UV Analzyer
Sampling Method Fan
Alarms Relays
Power Requirements 11-14 VDC or 120/240 VAC
Size 3.5 x 8.5 x 11 inches (9 x 21 x 29 cm)
Field Replaceable Battery No
Warranty 1 Year
Audible Alarm No
Calibration Annually
Range 0-250 ppm
Unit Features

-Standard enclosure

-Includes datalogging with software

-Measures accurate at low and high levels of ozone

- Offers many options to customize

Sensor Range

0-250 ppm (O3)

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