Ozone is heavier than air, so it can accumulate in low-lying areas of enclosed spaces, near generation equipment and off-gassing points, and in areas with limited ventilation.

Ozone’s oxidising properties can also damage certain metals, rubber, and some fabrics at high concentrations. This makes monitoring conditions with ozone detector hire an essential part of maintaining a safe work environment and protecting your tools and equipment.

Maintenance projects, plant shutdowns, and engineering inspections may require additional gas detection beyond the equipment normally available on site. Ozone detector hire allows teams to introduce monitoring quickly without maintaining specialist instruments long term.

When Ozone Monitoring Is Required

Monitoring is usually introduced wherever ozone is generated, used, or could be released during routine operation or maintenance work. This is particularly relevant in enclosed or poorly ventilated spaces where ozone could accumulate in occupied areas.

Water treatment systems, sterilisation equipment, and industrial processes that generate ozone can release small quantities during normal operation. Maintenance work, inspections, and fault-finding activities may also increase the likelihood of short-term exposure.

UK workplace guidance includes a short-term ozone exposure limit of 0.2 parts per million measured over a 15-minute reference period. O3 monitoring provides evidence that engineering controls and ventilation systems are performing effectively and that workers are not being exposed to levels above recommended limits.

Typical environments that require ozone monitoring

Certain industries and worksites have an increased risk of ozone build-up. They include:

• Municipal and industrial water treatment plants using ozone for disinfection
• Wastewater treatment processes where ozone removes persistent contaminants
• Cooling tower treatment systems which control microbial growth and biofilm
• Food and beverage manufacturing hygiene systems using ozone sterilisation
• Swimming pool and spa plant rooms where ozone is used during chlorination
• Pulp and paper bleaching operations using ozone during production
• Electronics and semiconductor environments where ozone may form as a by-product

Environmental conditions at these sites can also affect the accuracy of O3 sensors over time. Contact Ribble Enviro for advice on selecting the most suitable instrument for your worksite.

Choosing the Right Ozone Detector Hire

Selecting the right instrument and monitoring approach helps maintain dependable readings during surveys, maintenance work, and investigations.

Personal O3 detectors can monitor exposure on-the-go

Portable electrochemical detectors are commonly used for occupational ozone monitoring. These compact instruments provide real-time readings and can be carried by workers performing inspections, maintenance tasks, or routine operational checks at different locations within the worksite.

Electrochemical sensors can be influenced by environmental conditions and may respond to gases such as nitrogen dioxide. But for many workplace checks, they’re a practical solution. Compact instruments such as the Honeywell BW Solo or Crowcon Gasman are widely used for personal monitoring.

Multi-gas instruments can detect additional hazards

Some projects involve several potential gas hazards. In these situations, a multi-gas instrument can help reduce the number of devices carried during site work while still providing ozone readings alongside other measurements.

Instruments such as the Crowcon Gas-Pro are commonly used during maintenance work, inspections, and shutdown activities where several atmospheric risks may be present.

Higher-selectivity UV instruments for verification and investigation

In situations where greater selectivity or very low detection capability is required, ultraviolet absorption instruments may also be considered. These systems use spectrophotometry to measure ozone concentrations with high specificity. They are typically more complex than portable workplace monitors and are most often used for investigative work or verification surveys.

Unsure which O3 monitor hire is best suited for your needs? Tell us about the process, location, and any other gases present. Ribble Enviro will recommend a practical monitoring approach for your work, including whether ozone detector hire is right for you.