Ozone Leak Detection – Tech Tip

If you have spent any time around ozone systems, you know a part of maintenance is finding, and fixing, ozone leaks.

There is not much that is more frustrating than finding leaks from a gas that you cannot see, should not breathe/smell, and you become acclimated over time.  Trust me, I know, I’ve tried….

The best advice I can give is, find a good ozone detector.  Not some wall mount ozone monitor, or slow responding handheld, but small compact, fast responding ozone detector.  We have 2 great suggestions for you.

The A-21ZX is a great handheld ozone monitor.  The low cost makes it affordable and the fast response makes it a great ozone sensor.

A-21ZX Ozone Leak Detector with carry case
A-21ZX Ozone Detector – $679

What Makes the A-21 a Great Leak Sensor:

  • Fast response to ozone
  • Durable and includes carry case for on-site reliability
  • Long lasting battery life
  • Accessible sensor to get close to the source of the leak
  • Simple operation
  • Compact size
  • High range sensor (0-10.0 ppm) will not over-range easily
A-21ZX Ozone detector comes with handy carry case
A-21ZX Handy Belt Clip and Carry Case
A-21ZX Compact size is a great leak detector
A-21ZX Searching for Leaks














The C16 is a powerful and Fast Ozone Leak Detector. 

C16 PortaSense Ozone Leak Sniffer
C16 Ozone Leak Sniffer – $1,450

What Makes the C16 a Great Leak Sensor:

  • Built in sample pump pulls sample gas to the sensor
  • Fast response to ozone
  • Pinpoint accuracy with snout to find precise location of leak
  • Full featured device – data logging, alarms, interchangeable sensors
  • Includes full size carry case for carrying to job site safely
  • High range sensor (0-20.0 ppm) will not over-range easily


Using an ozone sensor like these is a great way to find the location of an ozone leak to make repairs.  When the ozone level in the room rises to unsafe levels you will know, and you can leave the room.  Here are some other tips.

  • Turn the ozone generator output as low as possible – try to have a little ozone leaking, keep it safe.
  • Work slowly, move along pipes and all potential leak points slowly
  • Start at the Ozone Generator and work away
  • When you find the leak area, grab a bottle of soapy water and spray on the suspect area.  Bubbles will form at the leak point.  This will show exact location of leak to be repaired
  • Remember the human olfactory system acclimates to ozone over time.  Keep the sensor, and when the ozone level is above 0.3 ppm, leave the room.
  • Ozone clings to surfaces, does not fluidly fill the room.  Work slowly, keep checking for the TRUE source of the leak.
  • Be patient.

Don’t get sucked into gimmicks like Snoop, or Potassium Iodine.  Ozone leak sensors and soapy water are the only tools you need, and the only tools that work every single time.

Call with questions, we love to help, and trust me, we’ve been there!

Ozone Leak Detection

Tech Tip.

Ozone Leak Detection is an inevitable part of operating any long term ozone system.  As with any toxic gas used for industrial and commercial applications eventually fittings, piping, and parts will eventually fail, allowing that toxic gas, in this case ozone, to leak.  What makes ozone slightly more challenging is the difficulty to measure ozone.  Ozone detectors have to measure a oxidant that is slowly destroying the very sensor intended for finding the ozone gas.  The short half life of ozone is also challenging.  Now it is there, later it is not.  Is there really a leak?

Below is a link to an article written by Eco-Sensors a manufacturer of ozone sensors.

Tips for Measuring Ozone in an Occupied Room

Here are some helpful tips for finding ozone leaks:

Use a high quality ozone sensor.  To find an ozone leak use an ozone sensor that responds quickly to ozone.  We suggest the C-16, or the A-21ZX.  See information in hyper links for details.  Both of these sensors will react quickly to ozone, and can help pinpoint the ozone leak.  The C-16 uses a probe that can pinpoint exact location.  This is our personal favorite ozone sensor.

Turn down the ozone.  The ozone level in the room can quickly become dangerously high limiting your time in the room to find the ozone leak.  Try turning the ozone generator down to the lowest level to produce less ozone and give yourself more time.

Turn off the ozone.  It may be necessary to turn off the ozone all together.  Keep your feed-gas operational but turn off the ozone generator.  Use a bottle of soapy water, and some patience.  you will eventually find the gas leaking by seeing bubbles forming near the fitting or piping.

Use common sense.  If your still not winning the battle, step back and think this through.  Where will ozone most likely be leaking?  Are there any pipes or hoses that commonly have vibration or movement, these would be most likely to spring a leak.  Are there components or fittings that have recently been opened?  Concentrate your efforts on threaded fittings, and push type fittings.  These are most common leaks.


Most of all take your time and be patient.

Also, feel free to give us a call, we would be glad to share our experience with you.


A-21ZX Ozone Sensor
A-21ZX Ozone Sensor – $679
C-16 PortaSens II Gas Detector
C-16 Ozone Leak Sensor – $1495