Chlorine Dioxide (ClO₂) Gas Detectors: Rent or Buy
Chlorine dioxide (ClO₂) is a yellow-to-red, highly reactive oxidizing gas with a pungent odor similar to chlorine and nitric acid. Unlike chlorine gas, chlorine dioxide is generated on-site and is too unstable to store or ship in bulk, meaning exposure risk is concentrated near generation equipment.
PICK HOW YOU NEED TO MONITOR
Detectors to Rent for Chlorine Dioxide
Personal monitors are worn in each worker's breathing zone and alarm on their exposure. Area monitors watch a fixed point, room or job site. Pick a style below, then compare every option in the table.
Top pick
Add-ons, kits and consumables
COMPARE OPTIONS
Chlorine Dioxide detectors side by side
| Instrument | Monitoring | Detection method | Range | Resolution / lowest alarm | Gases at once | Sampling | Battery run time | Intrinsically safe | Data logging | Starting at |
|---|---|---|---|---|---|---|---|---|---|---|
| Multi-Gas Monitors Read several gases at once from interchangeable sensors, worn on the body or set down as an area monitor. The sensors fitted decide which gases they read. | ||||||||||
| MultiRAE family (4 models) MultiRAE Lite PIDMultiRAE P2PMultiRAEMultiRAE Lite CO2Top pick | Personal + Area | Electrochemical | 0 to 1 ppm | 0.03 ppm | Up to 5 sensors | Internal pump | Approx. 12 hours | Yes | Yes | $110–$140 / day |
| Single-Gas Personal Monitors Small clip-on detectors that read one gas in the worker's breathing zone and alarm at set levels. | ||||||||||
| ToxiRAE Pro by Honeywell RAE Systems | Personal | Electrochemical | 0 to 1 ppm | 0.03 ppm | 1 | Diffusion | Over 30 hours in normal operation | Yes | Yes | $55.00 / day |
| Tape-Based Gas Monitors Draw air across a chemically treated tape that changes color when the target gas is present. The tape cassette fitted decides which gases it reads. | ||||||||||
| SPM Flex by Honeywell Analytics | Area | Chemcassette colorimetric tape | 20 to 1,000 ppb | Lowest alarm 25 ppb | 1 cassette | Internal pump (sample line up to 100 ft) | 6+ hours under typical conditions | No | Yes | $315.00 / day |
For instruments that take interchangeable sensors or cassettes, range and resolution are for the ClO₂ sensor or cassette. Run times are manufacturer estimates and vary with configuration and conditions. Not sure? Talk to our team.
WHERE EXPOSURE OCCURS
Risks: Where Chlorine Dioxide Exposure Occurs
Chlorine dioxide (ClO₂) is a powerful oxidizing gas used as a disinfectant and bleaching agent in water treatment, pulp and paper processing, food sanitation, and mold remediation. Even at low concentrations, ClO₂ is highly toxic, the OSHA PEL and NIOSH REL are both set at 0.1 ppm TWA, with an IDLH of just 5 ppm. Because ClO₂ is heavier than air and is generated on-site rather than stored in bulk, exposure risks are highest in confined areas where the gas can accumulate near the generation point.
Rent ClO₂-capable gas monitors from RAECO Rents for water and wastewater treatment facilities, pulp and paper mills, food processing plants, pharmaceutical manufacturing, and fumigation or mold remediation projects. All instruments are bump tested or span calibrated on the day of shipment. Our team can confirm the right monitor, sensor range, and alarm settings for your specific application — with fast turnaround and phone support so you can get reliable field readings quickly.
Water & wastewater treatment
ClO₂ is generated on site, so leaks occur near generators and feed lines.
Typical setup: Personal monitors with a ClO₂ sensor plus area monitoring near the generator.
Pulp & paper bleaching
Bleach plants that generate and use ClO₂.
Typical setup: Multi-gas monitors with a ClO₂ sensor.
Food & beverage sanitizing
Sanitizing systems for water, equipment and produce.
Typical setup: Personal monitors with a ClO₂ sensor near dosing equipment.
Fumigation & mold remediation
Room and building fumigation with ClO₂ gas.
Typical setup: Tape-based area monitoring to confirm safe re-entry.
EXPOSURE LIMITS
Chlorine Dioxide exposure limits
- TWA0.1 ppm (0.3 mg/m³)
- TWA0.1 ppm (0.3 mg/m³)
- STEL0.3 ppm (0.9 mg/m³)
- IDLH5 ppm
- TWA0.1 ppm (0.28 mg/m³)
- STEL0.3 ppm (0.84 mg/m³)
TWA = 8-hour time-weighted average (NIOSH RELs are 10-hour). STEL = 15-minute short-term limit. IDLH = immediately dangerous to life or health. Updated October 8, 2026.
Chlorine Dioxide monitoring questions
All rental FAQs →Not sure which chlorine dioxide detectors fit your job?
Tell us where the hazard is and how many workers need coverage. We'll recommend the instrument, range and alarm settings.
For educational purposes only. Exposure limits are summarized from the cited agencies; confirm monitoring requirements for your site with a qualified safety professional.