Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

CO monitor and Air Filter

CO monitor and Air Filter

CO monitor and Air Filter

Dear experts,

Is there any standard stating CO monitor is mandatory for blaster or painter ?

If we have air filter is it still mandatory to have CO monitor as well ?

Best regards,


RE: CO monitor and Air Filter

If you Company need to follow OSHA requirements, then YES! OSHA needs CO to be monitored. There is a requirement for "Carbon Monoxide In Workplace Atmospheres". You may ask a Safety Engineer for additional information. CO generated by the compressor also depends on the condition of the compressor as well.

Regarding your second question. Is your air filter rated for CO filtering? ask your air filter supplier, and find out how to determine the replacement interval in different CO levels or air contamination levels. You will eventually come back to a CO monitor at the long last.

CoCoE (https://www.linkedin.com/in/jithin-krishnan-naraya...)

RE: CO monitor and Air Filter

Thanks CocoE.

RE: CO monitor and Air Filter

Co is generated in Oil lubricated compressors. If you switch to Centrifugal compressors for breathing air you avoid this problem. If you are using piston or rotary screw compressors you have to monitor or scrub for Co.

You are judged not by what you know, but by what you can do.

RE: CO monitor and Air Filter


Thanks for your input.

We are using diesel engine compressor.

I would like to have more detail info about Oil Lubricated compressor and centrifugal compressor.

There must be some engineering explanations why we do not need CO monitor if we are using centrifugal compressor.


RE: CO monitor and Air Filter

It does not matter what the power plant for the compressor is as long as the exhaust is led away from the intake of the compressor.
The problem arises from the compressor burning some of its own lubricating oil, by dieseling as the air is compressed. Piston type compressors are the worst offenders at this. Rotary screw compressors not so much, however their discharge can be laden with oil mist, most, BUT NOT ALL, is taken out by the internal filters of the compressor.
Centrifugal compressors do not use oil in their systems so cannot generate Co or Co2 , they also do not generate the pressures that the other types of compressors do, so they require larger hoses for the same amount of air. Good practice dictates that any breathing air compressor intake is clear of any contaminates such as exhaust or paint overspray.
Bottom line unless you are using a centrifugal compressor, you need to filter for oil and carbon dust with a breathing quality air filter if you are using supplied air to your painters and sandblasters. You can use separate airlines for your paint spray and sand blasting lines with filters dependent on the quality of air you need. All of this information is detailed in OHSA., and European health and safety guidelines.

You are judged not by what you know, but by what you can do.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close