Carbon Monoxide tank testers

[DandyDon]

They say sensor life is 2-3 years. Would you guys say that's usually how long they last?

The issue with that model is calibrating it as suggested every 6 to 12 months requires special equipment so most would rather pay them to do it, except with that costing $75 plus shipping to them vs $89 for a new one, I'd order a new one and put the old one in my electronic recycling box I take to Best Buy.

How do you know when? I used to bump test by breathing on my Sensorcon, but now that I quit smoking, that doesn't seem to work. We need to find a source for cheap bump gas disposable cans.

I'm also curious about CO sensor life and calibration. I picked up a secondhand unused Palm CO that has a sensor past expiration - a bit over 2 years. Should I just replace it, or can I calibrate and test the unused, but expired, sensor?

Unused but still exposed is like Used, so I'd say replace it, but you can contact the company and get their opinion.