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Ozone Monitors

Gas-Sensing is a partner company to Oxidation Technologies, LLC.  Oxidation Technologies provides services and products exclusively to the ozone industry.  For all ozone related inquiries please refer to Oxidation Technologies.

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 What is Ozone?

 

The oxygen atom is unstable in the atomic form. Oxygen is stable in the diatomic form as O2. The air we breath today is made up of about 21% oxygen, this makes oxygen one of the most common molecules found in nature today.

Ozone is a triatomic form of oxygen, meaning that the molecule, ozone, is made up of 3 oxygen atoms. Unlike oxygen, ozone is a visible gas with a light blue color at very high concentrations. At low concentrations ozone is colorless. Ozone also has a distinct odor that is noticeable at very low levels and may be associated with a “clean” smell, at higher levels ozone has a very pungent odor. Ozone is an unstable gas that readily decomposes to oxygen naturally. Ozone is also a highly reactive gas that acts as a very strong chemical oxidant.

Ozone

 

 

Measuring Ozone in Air

Many applications require measurement and control of ozone of very low concentrations under 300 ppb (parts per billion). At these low concentrations, one needs to consider the following sampling issues with measuring ozone.

Ozone Characteristics

Ozone is Highly Reactive

  • Ozone is highly reactive. Ozone will react readily with organic materials and surfaces such as walls, flooring, ceiling material, plastic test chambers and people. The greater the accuracy of the ozone monitor, the greater the variations will become apparent. If you are testing the accuracy of ozone monitors in test chambers, ensure the devices inside the chamber are clean and do not readily react with ozone. Such materials that work well are fluoropolymers and glass.

  • Ozone will react with dust and oils. Ensure that all surfaces are clean and that any solvents used to clean such surfaces have completely dried. Even slight solvent residuals will have a dramatic effect on the sensor and residual ozone level in the chamber.

  • Ozone concentration gradients are common in rooms and are greatly influence by air movement and eddy currents. This effect will be more pronounced at concentrations less than 100 PPB.

Monitor Design and Use

  • Aeroqual’s ozone monitors are designed with "active sampling" to maximize air sampling at the sensor (to minimize ozone losses). Most expensive, analytical instruments also employ active sampling (e.g. UV photometry).
  • Products without "active sampling" (electrochemical and conventional HMOS products) will normally under-read ozone concentrations below 200 parts per billion and struggle with sensitivity and accuracy, particularly in low air flow.
  • "Active sampling" requires air to be blown or pumped to the sensor under precise flow conditions. Aeroqual fan based monitors are designed to be held at right angles to any direct stream being measured. Avoid forcing pressurized air into active sampling monitors:
  • Air inlets are manufactured from cleaned stainless steel mesh and fluoropolymer materials to minimize ozone loss.  

Measuring Ozone in an Occupied Room

Ozone concentrations can vary greatly at various locations, and the concentrations are often highest in unexpected places. Key points to consider are:

  • Ozone is much heavier than air and tends to sink to lower levels.

  • Ozone has a low vapor pressure and so it does not try to fill the room uniformly. It tends to stay where it is.

  • Ozone tends to cling to rough surfaces such as fabrics and breaks down (converts back to oxygen) when passing through restricted and obstructed passageways.

  • Ozone reverts back to oxygen with a "half life" (time to go to half of its original concentration) typically of 10-30 minutes.

  • Ozone can be confused by instrumentation with other oxidizing gases such as chlorine compounds, acid fumes, and oxides of nitrogen (NOx). Strong "reducing" gases, such as vapors of alcohol and solvents, can reduce the apparent concentration of ozone.

  • Ozone has a sweet smell, but the odor threshold varies widely by the person and by ambient conditions. Therefore "smell" is not a reliable test for the presence or concentration of ozone.

The important measurement is:

What is the ozone concentration at the breathing level where room occupants will be?

For ozone introduced via HVAC systems with good room air circulation, the alternate point of measurement is near the entrance to the return air duct.

Contact us for help choosing the right Ozone Sensor for your application

View our portable Ozone (O3) Monitors HERE

View our fixed mount Ozone (O3) Monitors HERE

 

Our full line of Ozone (O3) monitoring solutions are shown below

A-21ZX Ozone Sensor

Compact ozone sensor with a 0-10 ppm range.  The A-21ZX is a great ozone sensor for personal protection and leak detection as it responds to ozone quickly and is a durable piece of equipment.

Includes handy carry case with integrated belt clip to keep it safe and at your reach at all times.

A-21ZX Ozone Sensor 

A-22 Ozone Monitor

The A-22 offers a Min, Max, Avg recording system along with analog outputs and basic data logging.  Also integrated into a rugged case to keep it safe on the job site.

The A-22 offers a range of ozone measurement from 0-10 ppm, with a resolution of 0.001 ppm.

A-22 Ozone Sensor

C-16 PortaSens Ozone Sensor

The C-16 Is the best device for leak detection and pinpointing areas where unwanted ozone may be present.  No other monitor responds as quickly or has the pinpoint accuracy of the C-16 for ozone leak detection.

Ozone sensors of either 0-2 ppm or 0-20 ppm are available.  The 0-2 ppm sensor is perfect for personal safety and some low level ozone leak detection.  The 0-20 ppm sensor is perfect for leak detection.  The sensors used in the C-16 are also directly interchangeable with either the F-12, or D-12 toxic gas transmitters.  This allows the 0-2 or 0-20 ppm sensor to be interchanged between devices so you have the right tools for every job.

The C-16 allows for multiple gas sensors go be purchased and used.  With a fast response time, and features such as data logging, alarms, and min,max,avg recording, this is a great all around gas sensor for most every use.

C16 Sensor in Hand

Series-500 Ozone Monitor

The Aeroqual Series-500 Monitor is available with 4 different ozone sensor heads

  • 0-0.05 ppm (OZS) Head for ultra low ozone detection and ppm resolution
  • 0-0.15 ppm (OZU) Head for low ozone levels and ppm resolution
  • 0-0.5 ppm (OZL) Head for personal safety ozone levels
  • 0-10.0 ppm (EOZ) Head for common use and leak detection

The Series-500 can be configured with a variety of other gas detecting heads to provide you with additional flexibility.

The Series-500 also offers, audible alarm, min/max/avg recording, internal relays for external control of devices or alarms, Integrated data logging with industry leading desktop software.

Aeroqual S-500

Series-300 Ozone Monitor

The Aeroqual Series-300 Monitor is available with 4 different ozone sensor heads

  • 0-0.05 ppm (OZS) Head for ultra low ozone detection and ppm resolution
  • 0-0.15 ppm (OZU) Head for low ozone levels and ppm resolution
  • 0-0.5 ppm (OZL) Head for personal safety ozone levels
  • 0-10.0 ppm (EOZ) Head for common use and leak detection

The Series-300 can be configured with a variety of other gas detecting heads to provide you with additional flexibility.

The Series-300 also offers, audible alarm, min/max/avg recording, internal relays for external control of devices or alarms.

Series-300

Series-200 Ozone Monitor

The Aeroqual Series-200 Monitor is available with 4 different ozone sensor heads

  • 0-0.05 ppm (OZS) Head for ultra low ozone detection and ppm resolution
  • 0-0.15 ppm (OZU) Head for low ozone levels and ppm resolution
  • 0-0.5 ppm (OZL) Head for personal safety ozone levels
  • 0-10.0 ppm (EOZ) Head for common use and leak detection

The Series-200 can be configured with a variety of other gas detecting heads to provide you with additional flexibility.

The Series-200 also offers, audible alarm, min/max/avg recording.

Series-200

Series-900 Ozone Controller

The Series-900 Controller Carbon Monoxide heads are available in 0.05 ppm, 0.15 ppm, 0-0.5 ppm, and 0.10.0 ppm.

The Series-900 can be configured with a variety of other gas detecting heads to provide you with additional flexibility.

The Series-900 boasts:

  • Versatile controller with 4-20mA output and RS-485 output
  • 2 alarm relays and 2 control relays that are user settable

F-12 Toxic Gas Detector

The F-12 allows for multiple gas sensors go be purchased and used.  The F-12 is configurable with options such as and intrinsically safe enclosure, remote mounted sensors and others.

In the F-12 page choose the sensor that is right for you. Ozone sensor is available in a 0-2 or 0-20 ppm range.  Also choose other sensors that may be right for you.

D-12 Toxic Gas Transmitter

The D-12 allows for multiple gas sensors to be purchased and used.  The D-12 is designed for operation in hazardous areas. The cast aluminum housing for the D12 transmitter is rated for Class 1, Division 1, Group B, C, D locations and is UL, FM, and CSA certified.

In the D-12 page choose the sensor that is right for you. Carbon Monoxide sensor is available in a 0-2 or 0-20 ppm range.  Also choose other sensors that may be right for you.

D-12 Toxic Gas Detector
 

SM-70 Ozone Sensor

The SM-70 Ozone Sensor is a great option for basic safety, alarm and control needs.  A large LCD backlit display clearly indicates the ozone level in your room with 0.01 ppm resolution. 

Ozone Sensor ranges of 0-0.15 ppm, or 0-0.5 ppm are available to target the safety level you require.  With integrated audible alarm, relays, and 0-5 VDC output this is a great device at a low cost.

Aeroqual SM-70

 OS-4 Ozone Switch

The OS-4 Ozone Switch is a remote mount ozone sensor that uses the SM-4 remote mount sensor that can be placed up to 100 meters away from the base unit.

0-10 ppm range, integrated relays for control and alarm make this a great ozone switch for ozone generator control, or human safety.

OS-4 Ozone SwitchSM-4 Sensing Module

 

OS-6 Ozone Controller

The large backlit display on the OS-6 displays ozone levels from 0-10 ppm with 0.01 ppm resolution with a remote mount sensor.  The OS-6 offers 3 integrated relays and great options for control or safety of your Ozone System.

The OS-6 Ozone Controller is a remote mount ozone sensor that uses the SM-4 remote mount sensor that can be placed up to 100 meters away from the base unit.

OS-6 Ozone ControllerSM-4 Sensing Module

UV-1 OEM Ozone Photometer

The Aeroqual UV-1 OEM Ozone Photometer is the perfect solution for areas where other gasses cause cross sensitivity issues to standard electrochemical or HMOS sensors.

0-200 ppm range, integrated relays and user friendly software make this a great OEM solution to your ozone Photometer needs.

UV-1 Ozone Analyzer

 UV-100 Ozone Analyzer

The EcoSensors UV-100 Ozone Analyzer is a bench top ozone analyzer that measures ozone from 0-900 ppm  with the accuracy and reliability of a UV Analyzer.

Integrated relays, and data logging with handy software make this a great UV analyzer for lab or research needs along with a potential portable solution where other sensors will be affected by background gasses.

UV-100 Ozone Analyzer

SM-50 OEM Ozone Sensor

The simple SM-50 Ozone Sensor is an OEM solution for integration into Ozone Generators, Ozone Systems, or your ozone control system.  This is a circuit board based ozone sensor that is low cost, and yet easy to use.  With easy to set relays this is a great sensor for your integration project.

Two ranges available 0-0.5 ppm, or 0.0.15 ppm.

SM-50

C-30ZX Ozone Monitor

The Ecosensors C-30ZX is a commonly used ozone switch for human safety and Ozone System control.  Audible alarm and a user settable relay make this an easy to use ozone sensor for human safety

0-0.14 ppm range with easy to see LED bars that change from green to yellow to red to indicate safe or unsafe levels of ozone in your area.

C-30ZX Ozone Monitor

Gassense A14/A11

The ATI A14/A11 is a multipoint ozone monitor that can also monitor other gasses at the same time.

Two standard ozone ranges and unlimited custom calibrated ranges are possible.

GasSens A14/A11 Transmitter with Sensor

 

Aeroqual Series 940

The S-940 is fixed mount gas sensor with a sample pump.  This will allow sample gasses to be pulled from another environment while the display is in a safe location for display and control of the ozone gas.

0 - 10 ppm range or 0 - 0.5 ppm ranges are available for ozone sensors.

Series 940 monitor with vacuum pump
 

OEM-1 Ozone Controller

OEM-1 Ozone Controller is an OEM ozone board with a simple ozone sensor with relays and voltage output.  Requires 120 VAC power.

Three ranges available 0-0.1ppm, 0.1.0 ppm, or 0-10 ppm.

OEM-1 Ozone Controller
 

OEM-2 Ozone Controller

OEM-2 Ozone Controller is an OEM ozone board with a simple ozone sensor with relays and digital 4-20 mA output.  Requires 12 or 24 VDC power.

Three ranges available 0-0.1ppm, 0.1.0 ppm, or 0-10 ppm

OEM-2 Ozone Controller

Aeroqual Series-930 Ozone Monitor

The Aeroqual Series-930 Ozone Monitor is a fixed mount monitor with a variety of options to customize to your needs.  Digital interface allows for RS-485 communications, or 4-20 mA output along with relays and a display.

0 - 10 ppm range or 0 - 0.5 ppm ranges are available for ozone sensors.

Series-930 controller

EZ-1X Ozone Detector

Portable battery powered ozone detector that is low cost and easy to use.  Great for basic ozone detection and personal safety.

0-0.14 ppm range with easy to see LED bars that change from green to yellow to red to indicate safe or unsafe levels of ozone in your area.

EZ-1X handheld ozone sensor

 

Contact us for help choosing the right Ozone Sensor for your application

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