COCl₂GAS & VAPOR HAZARD · CAS 75-44-5

Phosgene Gas Detectors: Rent or Buy

Phosgene (COCl₂) is a colorless, highly toxic gas with a faint odor of freshly cut hay or grass. It is produced during the combustion or thermal decomposition of chlorinated compounds, including chlorinated solvents, refrigerants, and plastics.

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TOP PHOSGENE RENTAL
SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector
Tape-Based Gas Monitor · Area
SPM Flex by Honeywell Analytics
Starting at $315.00 / day
Configure & rent Quote for multiple units

THE INSTRUMENT FOR THIS HAZARD

Detectors to Rent for Phosgene

We rent one instrument for phosgene. Its key specifications are below, along with what you need to run it.

SPM Flex by Honeywell Analytics - Single Point Chemcassette Tape-Based Gas Detector
Tape-Based Gas Monitor
SPM Flex by Honeywell Analytics
Monitoring
Area
Detection method
Chemcassette colorimetric tape
Range
2 to 2,000 ppb
Resolution / lowest alarm
Lowest alarm 5 ppb
Gases at once
1 cassette
Sampling
Internal pump (sample line up to 100 ft)
Battery run time
6+ hours under typical conditions
Intrinsically safe
Data logging
$315.00 Starting at /per day
Configure Product

What you need with it

Phosgene Chemcassette for SPM Flex Phosgene Chemcassette for SPM Flex $195.00 / unit

WHERE EXPOSURE OCCURS

Risks: Where Phosgene Exposure Occurs

Phosgene monitoring helps protect workers from a highly toxic gas that can cause delayed lung injury, especially when chlorinated solvents or materials are exposed to heat during welding, cutting, or fire events. RAECO Rents gas monitors are bump tested or span calibrated on the day of shipment. Our team can help confirm the right monitor, alarms, and setup for the job, with fast turnaround and phone support so you can get reliable field readings quickly.

Chemical manufacturing

Phosgene is an intermediate for pharmaceuticals, agricultural chemicals and polymers, so leaks can occur at process, transfer and storage points.

Typical setup: Continuous tape-based monitoring at the likely release point.

Hot work near chlorinated materials

Welding, cutting or heating near chlorinated solvents and materials can form phosgene.

Typical setup: A tape-based area monitor sampling near the work zone.

Fires & thermal decomposition

Burning refrigerants, plastics and other chlorinated materials can release phosgene.

Typical setup: Talk to our team about the right setup for post-fire work.

EXPOSURE LIMITS

Phosgene exposure limits

OSHA phosgene resources ↗
OSHA PEL
  • TWA0.1 ppm (0.4 mg/m³)
NIOSH REL
  • TWA0.1 ppm (0.4 mg/m³)
  • Ceiling0.2 ppm (0.8 mg/m³) [15-min]
  • IDLH2 ppm
ACGIH TLV
  • Ceiling0.02 ppm [2021]

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 2, 2026.

When do rental charges start? On the Rental Start Date you choose, not the day we ship. See how renting works

Phosgene monitoring questions

All rental FAQs →
When is phosgene a real hazard on a jobsite?
Phosgene is a credible hazard when chlorinated solvents or materials can be exposed to high heat—welding/cutting near solvent residues, fires involving chlorinated products, or certain chemical process environments. The key is identifying whether chlorinated compounds and high heat can coincide.
Can I rely on smell or general gas detection when phosgene is a concern?
No. Phosgene's odor threshold is above its dangerous concentration—by the time you can smell it, you may already be at a harmful exposure level. General photoionization detectors (PIDs) and standard 4-gas monitors do not reliably detect phosgene. If phosgene is a credible hazard (chemical processes, chlorinated solvent use near heat sources), you need a phosgene-specific monitor or colorimetric tubes calibrated for phosgene.
Where should monitors be placed to detect phosgene early?
Place monitors near the work area in the breathing zone and in likely accumulation areas based on airflow—not just at room entrances. In enclosed or low-ventilation spaces, multiple monitoring points improve coverage. Since phosgene can reach hazardous levels before odor is detectable, placement near the source of heat and chlorinated material matters most.
What should I know before renting phosgene monitoring for welding or cutting work?
Confirm what solvents/cleaners were used, whether residues could remain, ventilation conditions, and whether the task occurs in an enclosed space. Also confirm whether you need continuous monitoring during the task.
Why are spot checks risky when phosgene is a concern?
Because concentrations can spike quickly during heating events and health effects can be delayed by hours—meaning a person may feel fine initially and deteriorate later. Continuous monitoring during the task provides real-time warning when phosgene is plausible, rather than relying on infrequent readings that could miss a dangerous peak.
Should I use a phosgene-specific monitor or general gas detection when phosgene is a concern?
Use a phosgene-specific monitor whenever phosgene is plausible—chlorinated solvents or materials exposed to high heat, fires, or certain process work. Standard 4-gas monitors and VOC PIDs do not reliably detect phosgene. Given its very low exposure limits and delayed health effects, if the reading will drive safety, entry, or re-entry decisions, phosgene-specific detection is the only defensible choice.

Not sure which phosgene 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.

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For educational purposes only. Exposure limits are summarized from the cited agencies; confirm monitoring requirements for your site with a qualified safety professional.