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Model 106-L Ozone Monitor

Versatile ambient Federal Equivalent Method (FEM) ozone monitor designed for both outdoor and industrial compliance monitoring applications. Ideal for industrial applications including: workplace exposure monitoring, fruit/vegetable cold storage, ozone disinfection, and many others.

  • Linear dynamic range of 0-100 ppm with 1.5 ppb precision
  • Use in a variety of applications ranging from ambient air monitoring to personal exposure
  • Front panel indicator light for concentrations exceeding 0.1 ppm
  • EPA certified (FEM) compliance monitoring under the Clean Air Act: EQOA-0914-218


The Model 106-L Ozone Monitor is designed for measurements of ozone concentrations ranging from low ppb levels up to 100 ppm (100,000 ppb). This highly accurate ozone monitor (1.5 ppb) has a low limit of detection (3.0 ppb for 10 second measurements) and is certified by the EPA as a FEM for monitoring for compliance with the US Clean Air Act:  EQOA-0914-218


About the 106 Series:

  • Designed for industrial ozone applications to cover four different ozone concentration ranges by varying the optical path length. 
  • Highly robust and easy to service; all components are mounted directly to the printed circuit board with few wire connection
  • Available in the three following configurations: Standard Enclosure, Industrial Enclosure, or with no enclosure (OEM version)
  • Industrial/NEMA Enclosure is available with single channel, three channel, or six channel sampling manifolds (106-H only available as single channel)


106 Series Comparison:

Model Range Resolution Precision & Accuracy
106-L 0-100 ppm 0.0001 ppm (0.1 ppb) Higher of 0.0015 ppm (1.5 ppb) or 2% of reading
106-M 0-1,000 ppm 0.01 ppm Higher of 0.01 ppm or 2% of reading
106-MH 0-10,000 ppm (0-1 vol%) 0.1 ppm Higher of 0.05 ppm or 2% of reading
106-H 0-20 wt% O2 or Air
0-14 vol%
0.01 wt%
0.01 vol%

Higher of 0.01 wt% or 2% of reading

Product Configurations

Standard Enclosure

Suitable for air pollution studies and university research.

  • Dimensions (Height x Width x Depth): 3.6 x 7.9 x 9.4 inches / 9 x 20 x 24 cm
  • Weight: 4.2 lbs / 1.9 kg
  • Channels: 1
  • Relays: Two 2-level relays
  • Federal Equivalent Method (FEM) [106-L]
  • DewLine™ for Humidity Control
  • Robust and easy to service

Industrial Enclosure

Suitable for workplace health and safety monitoring where ozone is being produced and used in a wide range of applications (see Applications below).

  • Water-resistant
  • Dimensions (Height x Width x Depth): 16 x 14 x 9.3 inches / 40.7 x 35.7 x 23.6 cm
  • Weight: Approx. 14 lb / 6.3 kg (depends on multi-channel options)
  • Channel Options: 1, 3, or 6
  • Relays: Four 2-Level relays
  • Federal Equivalent Method (FEM) [106-L]
  • DewLine™ for Humidity Control
  • Robust and easy to service

OEM Version (No enclosure)

Suitable for either mounting in a custom enclosure or using as a component of a larger system.

  • Dimensions (Height x Width x Depth):  2.5 x 7 x 9 inches / 6.2 x 17.8 x 22.9 cm
  • Weight: 2.8 lb / 1.3 kg
  • Channel Options: 1
  • Relays: Two 2-level relays
  • Federal Equivalent Method (FEM) [106-L]
  • DewLine™ for Humidity Control
  • Robust and easy to service
  • UV absorption-based measurements, single beam
  • Low power consumption
  • Battery operated (with optional external lithium-ion battery)
  • Internal data logger with real-time clock
  • ​2-s measurement interval
  • On-board microprocessor with interactive menus includes data averaging options of 10 s, 1 m, 5 m, 1 hr, and user-defined adaptive filter
  • USB and RS-232 output of time/date, O3 concentration, internal temperature and pressure
  • Analog output (0-2.5 V and 4-20 mA) of ozone concentration in user-selected units and scaling factors
  • Two 2-level relays for control purposes (e.g., control of ozone source or turn warning light on and off); Four relays on Industrial enclosure models and in the 3-channel and 6-channel optional configurations
  • Long-life pump (15,000 hr)
  • Lithium-ion battery available for purchase
  • Bluetooth for wireless data transmission
  • Flow-through configuration
  • Industrial/NEMA version can be purchased with either a three-channel or six-channel sampling manifold
  • Serial-USB converter available for purchase (not included)
  • High-altitude upgrade available (0–25 km)
  • External particle filter
  • Exhaust port
  • Model 106-L Ozone Monitor
  • 1.25A power adapter (2.5A for multichannel configurations)
  • Serial port cable (9PinF-9PinF)
  • External ozone scrubber
  • USB cable
  • Relay connectors
  • USB flash drive preloaded with operation manual
  • NIST-traceable calibration data
  • Health and Safety Compliance
  • Water Treatment
  • Food Processing
  • Aquaculture
  • Produce Warehouses
  • Air Pollution Studies
  • Research
  • Effects of Anesthesia on Ozone-Induced Lung and Systemic Inflammation, M.L. Wilson, J.A. Thysell, K.K. Baumann, D.V. Quaranta, W. S. Liang and M.A. Erickson, Lung (2022) 13, doi: 10.1007/s00408-022-00514-5.  Springer Link
  • Important Role of NO3 Radical to Nitrate Formation Aloft in Urban Beijing: Insights from Triple Oxygen Isotopes Measured at the Tower, M.-Y. Fan, Y.-L. Zhang, Y.-C. Lin, Y. Hong. Z.-Y. Zhao, F. Xie, W. Du, F. Cao, Y. Sun and P. Fu, Environmental Science & Technology (2022) 56, 11, 6870-6879.  ACS Link
  • Identification of Environmental and Experimental Factors Influencing Human Perception of DC and AC Electric Fields, K. Jankowiak, S. Driessen, A. Kaifie, S. Kimpeler, T. Krampert, T. Kraus, D. Stunder and M. Kursawe, BioElectroMagnetics (2021) 42, 5, 341-356.  Wiley Link
  • A Portable Air Quaity Monitoring Unit and a Modular, Flexible Tool for On-Field Evalutaion and Calibration of Low-Cost Gas Sensors, D. Suriano, HardwareX (2021) 9, e00198.  ScienceDirect
  • Mechanism of Atmospheric Organic Amines Reacted with Ozone and Implications for the Formation of Secondary Organic Aerosols, D. Tong, J. Chen, D. Qin, Y. Ji, G. Li, and T. An, Science of The Total Environment (2020) 737, 139830.  ScienceDirect


Spec Sheet
Measurement Principle UV Absorption at 254 nm, single beam
Measurement Interval 2 s
Linear Dynamic Range 0-100,000 ppb (0-100 ppm)
Resolution 0.1 ppb
Precision (1σ for 10-s average; aka rms noise) Greater of 1.5 ppb or 2% of Reading
Limit of Detection (10-s average, 2σ) 3.0 ppb
Accuracy Greater of 1.5 ppb or 2% of Reading
Baseline Drift < 3 ppb/day, < 6 ppb/year
Sensitivity Drift < 1%/day, < 3%/year
Calibration NIST Traceable; Annual calibration recommended
Measurement Time, Frequency 2 s, 0.5 Hz
Data Averaging Options 10 s, 1 min, 5 min, 1 hr
Response Time, 100% of Step Change For 2-s output: 4 s, 2 data points
For 10-s output: 20 s, 2 data points
Adaptive Filter Available, user-specified parameters
Data Logger Capacity 32,736 lines (10 s avg. = 3.8 days; 5 min avg = 113 days)
Data Transfer Baud Rate 2400, 4800, 19200
Ozone Units ppb, pphm, ppm, µg m-3, mg m-3
Temperature Units oC, K
Pressure Units mbar, torr
T and P Corrected Yes
Operating Temperature Range 0 to 50oC
Operating Altitude Range 0-13.5 km (0-25 km option)
Flow Rate Minimum required: 0.6 L/min; Nominal: 1 L/min; Maximum: 1.5 L/min
Digital Data Outputs USB, RS232, LCD Display
Analog Data Outputs 0-2.5 V Analog, 4-20 mA, User-Scalable in Menu
Power Requirements 100-240 VAC, 50/60 Hz
11-28 V DC, nominally 500 mA at 12 V DC, 6 watt
Relays with 2 Setpoints Two available:
Relay 1 responds based on user’s ozone set points
Relay 2 responds based on user’s ozone set points OR responds based on diagnostics (T, P, flow, lamp voltage)
Four relays for Industrial models and in 3-channel and 6-channel optional configurations
Bluetooth Option Available Yes
Flow-Through Option Available Yes
Multi-Channel Options Available Yes, 3-channel and 6-channel configurations
Size Standard Case: 3.6 x 7.9 x 9.4 inches (9 x 20 x 24 cm)
OEM Version: 2.5 x 7 x 9 in (6.2 x 17.8 x 22.9 cm)
Industrial Version: 16 x 14 x 9.3 in (40.7 x 35.7 x 23.6 cm) H x W x D
Weight Standard Case: 4.2 lb (1.9 kg)
OEM Version: 2.8 lb (1.3 kg)
Industrial Version: ~14 lb (6.3 kg) depending on multi-channel options selected
Options Battery, Particle Filter, Bluetooth, Exhaust Port, Flow-Through Configuration, Multi-Channel Configurations, High-Altitude Package


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