KaDy
Hi, My carbon monoxide detector said 11 about an hour ago, The pilot light went out on the gas fireplace. Is 11 bad? I have animals in my house and I want to make sure they are going to be okay. The detector says 0 now.
Answer
The carbon monoxide seems to be coming from the gas fireplace since carbon monoxide is produced by the incomplete burning(combustion) of solid, liquid, and gaseous fuels.If you smoke a couple of cigarettes, or someone had been smoking a cigar in the last hour, you could hit 11ppm CO in your home. Cigarette smokers exhale between 4 and 9 ppm CO all the time. And, if you're in a city, it's possible that the background CO rises to that level during the day. The mechanic's meter might hit 12-15 ppm standing in the middle of your back yard!
Besides, 11-12ppm CO may be ambient conditions and nothing to really worry about. It could also be "left over" output from cooking or some other activity. To make it even more complicated, the cheap CO meters and many residential CO detectors are cross-sensitive to other gasses, like methane, butane, alcohol, aerosols, etc. I've seen "Pam" cooking spray put a CO detector into alarm.
Besides, if you had been cooking, using the oven, heating water on the stove, or had a door or window open that could cause your flue(any duct or passage for air, gas, or the like) to down draft, you might see 5-20ppm in the house for a period of time. An oven will produce anywhere from 20 to 600 ppm when operating. Most run in the 30-100ppm range.
You should still check with the local firedepartment or call the company that made The detector your using.
The carbon monoxide seems to be coming from the gas fireplace since carbon monoxide is produced by the incomplete burning(combustion) of solid, liquid, and gaseous fuels.If you smoke a couple of cigarettes, or someone had been smoking a cigar in the last hour, you could hit 11ppm CO in your home. Cigarette smokers exhale between 4 and 9 ppm CO all the time. And, if you're in a city, it's possible that the background CO rises to that level during the day. The mechanic's meter might hit 12-15 ppm standing in the middle of your back yard!
Besides, 11-12ppm CO may be ambient conditions and nothing to really worry about. It could also be "left over" output from cooking or some other activity. To make it even more complicated, the cheap CO meters and many residential CO detectors are cross-sensitive to other gasses, like methane, butane, alcohol, aerosols, etc. I've seen "Pam" cooking spray put a CO detector into alarm.
Besides, if you had been cooking, using the oven, heating water on the stove, or had a door or window open that could cause your flue(any duct or passage for air, gas, or the like) to down draft, you might see 5-20ppm in the house for a period of time. An oven will produce anywhere from 20 to 600 ppm when operating. Most run in the 30-100ppm range.
You should still check with the local firedepartment or call the company that made The detector your using.
How do carbon monoxide detectors work?
kyorge6293
I am trying to create a detector to see how much carbon monoxide is in a room. I am looking to find an specific average throughout a day, not just if the carbon monoxide level is too high.
By the way, I am doing a project on Indoor Air Pollution.
Thanks in Advance.
Answer
Most Carbon Monoxide detectors determine the amount of CO present in the air by using an electrolytic sensor. If the value is high, the alarm sounds.
There are digital CO detectors available which will read you the level on an LED number display. You can write down the numbers on the display at predetermined intervals and average them after 24 hours has passed. Most houses should read 0 all of the time. I've only seen mine say something other than 0 when I was working on the car in the garage and had it running for a couple minutes (with the garage door open although still allowed enough into the house to cause it to display, but not alarm). Take a look just past halfway down this page and you will see a couple models with a digital readout on them:
http://www.firstalert.com/CarbonMonoxideAlarmsCatalog.aspx
Most Carbon Monoxide detectors determine the amount of CO present in the air by using an electrolytic sensor. If the value is high, the alarm sounds.
There are digital CO detectors available which will read you the level on an LED number display. You can write down the numbers on the display at predetermined intervals and average them after 24 hours has passed. Most houses should read 0 all of the time. I've only seen mine say something other than 0 when I was working on the car in the garage and had it running for a couple minutes (with the garage door open although still allowed enough into the house to cause it to display, but not alarm). Take a look just past halfway down this page and you will see a couple models with a digital readout on them:
http://www.firstalert.com/CarbonMonoxideAlarmsCatalog.aspx
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