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Model 106-M Ozone Monitor

The Model 106-M is a versatile medium-range (0-1,000 ppm) ozone analyzer designed for industrial applications ranging from off-gas measurements in water treatment plants to the use of ozone to prevent ripening of fruits and vegetables. Our Model 106-M uses the UV-absorption measurement technique to produce highly accurate measurements (± 2%).

  • Available in a Standard (Benchtop Enclosure), Industrial/NEMA Enclosure, or as an OEM
  • Widely used in applications involving ozone disinfection/sterilization of hospital rooms, cruise ship cabins, and workspaces
  • Optional corrosion-resistant modification for use with ozone generators where feed gas is air instead of oxygen


The Model 106-M Ozone Monitor is designed for measurements of ozone in the range 0-1,000 ppm with a resolution of 0.01 ppm. This highly accurate ozone monitor has been widely used around the globe since 2006 by industrial customers looking to measure medium-range concentrations of ozone.


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
  • Measurement based on UV absorption at 254 nm, single beam
  • Low power consumption (~6 watt); can be battery operated (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 upgrade available for wireless data transmission
  • Flow-through configuration
  • Corrosion-resistant modification
  • Industrial/NEMA version can be purchased with either a three-channel or six-channel sampling manifold
  • Serial-USB converter available for purchase (not included)
  • External particle filter
  • Exhaust port
  • Model 106-M 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 and other useful documentation
  • NIST-traceable calibration certificate
  • Measurement of ozone off-gas in water treatment plants
  • Disinfection of hospital rooms and cruise ship cabins
  • Sanitation/sterilization of medical equipment
  • Fruit/vegetable cold storage
  • Meat processing plants
  • Rubber testing
  • Fast and Deep Disinfection for Face Masks Recycle Using Vacuum Ultraviolet Irradiation, S. Ye, Y. Li, H. Huang, Y. Xu, S. Du, F. Wan, R. Xie, P. Huang, B. Liu, T. Dong, Z. He and D.Y.C. Leung, Journal of Cleaner Production (2022) 368, 133221. ScienceDirect
  • Ozone Treatment Improves the Texture of Strawberry Fruit during Storage, T. Piechowiak, D. Migut, R. Józefczyk and M. Balawejder, Antioxidants (2022) 11, 5, 821. MDPI Link
  • Plasma-Generated Reactive Water Mist for Disinfection of N95 Respirators Laden with MS2 and T4 Bacteriophage Viruses, J. He, M. Waring, A. Fridman, A. Ravinovich, C. Bailey, G. Fridman and C.M. Sales, Scientific Reports (2022) 12, 19944.  NatureLink
  • Pseudoviruses for the Assessment of Coronavirus Disinfection by Ozone, I. Zucker, Y. Lester, J. Alter, M. Werbner, Y. Yecheskel, M. Gal-Tanamy and M. Dessau, Environmental Chemistry Letters (2021) 19, 1779-1785.  SpringerLink
  • Removal of Taste and Odor Causing Compounds from Drinking Water Sources by Peroxone Process: Laboratory and Pilot Scale Studies, M. Fakioglu, H. Gulhan, H. Ozgun, M. Evren Ersahin and I. Ozturk, Ozone: Science & Engineering (2021) 43, 6.  Taylor&Francis Link


Spec Sheet
Measurement Principle UV Absorption at 254 nm, single beam
Measurement Interval 2 s
Linear Dynamic Range 0-1,000 ppm
Resolution 0.01 ppm
(1σ for 10-s average; aka rms noise)
Greater of 0.01 ppm or 2% of reading
Limit of Detection
(10-s average, 2σ)
0.02 ppm
Accuracy Greater of 0.01 ppm or 2% of reading
Baseline Drift < 0.01 ppm/day, < 0.03 ppm/year
Sensitivity Drift < 1%/day, < 3%/year
Calibration NIST Traceable; Annual calibration recommended
Measurement Time and 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-defined parameters
Data Logger Capacity 32,736 lines (10 s avg. = 3.8 days; 5 min avg = 113 days)
Data Transfer Baud Rates 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
DewLine™ for Humidity Control Yes
Operating Temperature Range 0 to 50oC
Power Requirements 100-240 VAC, 50/60 Hz
11-28 V DC, nominally 500 mA at 12 V DC, 6 watt
Flow Rate Minimum required: 0.3 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
Relays with 2 Setpoints Two provided:
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 on Industrial models and in the 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: 3.9 lb (1.8 kg)
OEM Version: 2.5 lb (1.1 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, Corrosion-Resistant Modification


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