Why does my Nighthawk carbon monoxide detector keep chirping every so often and reading 248 after I reset it?

Dragonlady

The last few days, the detector has chirped...does it for about an hour or less, every 30 seconds or so. Sometimes it stops for hours..even up to a day before it does it again. I've changed the battery twice. It came up low battery once...but was reading 0 the whole time the other times it happened. Then when I hit reset, it went to 888, then to 248 and once said 247. I don't understand this...makes me worry, yet it goes back to 0.

Answer
It suggests that there most likely is a malfunction if as you say that you've put new batteries in. It could also be an end of life warning (not yours, the carbon monoxide detectors'). If you've had the alarm for between 4-7 years this could be the case. People have had some problems with this particular model of carbon monoxide detector. It's probably best to contact the manufacturer directly, in this case Kidde, and if you have a valid warranty get them to send a new one asap. If not and your detector is in the end of life period it's probably better to buy a new one asap anyway. In the meantime it's better not to take any risks; make sure your house is well ventilated at all times.

Worried about Carbon Monoxide.?

Worried about Carbon Monoxide.

Okay so the carbon manoxide dector went off. It was showing there was 400ppm, after it stopped beeping for a few min. I checked the memory, and it said the max ppm was 0ppm. I replaced the batteries since I thought it could be the batteries could have gone bacd. But when I checked the amount of juice left in the batteries it was still pretty much fully charged. So I put the new batteries in and it's been about 2 days ago and the detector hasn't gone off since. So was it was just a false alarm? It's not even showing a reading above 0 ppm.

Sadly there's no way to get it checked out or my parents will get pissed at me...

Answer
Carbon Monoxide levels could have risen temporarily and then fallen back to 0 ppm. I cannot see any other explanation. Notify your parents that the alarm went off and they can either replace it or get it checked out by a professional.

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Is it normal for a carbon monoxide detector to read 0 ppm?

dfjkdfj

I got a carbon monoxide detector, which reads 0 ppm. It has a feature that allows you to check the highest level within the past 24 hours, which also is 0 ppm. Is this normal? I thought there might be one or two ppm in the house.

Answer
It can read it. But f you want to know if it is working then it will either need to be calibrated by a professional (cheaper to buy a new one), or quick gut check take it to the hood of an 80% gas HW heater. It should give you some reading and I usually see above 9 when around a water heater.

Carbon Monoxide Detector - Peak Level Reading Question?

Alex

I have the Kidde KN-COPP-3 detector and I'm having a little trouble figuring out how it's operating.

So far I have not had any alarms go off, and I always get a reading of zero. However, today when I came home I had the "Err" error message displayed, and when I tested the Peak Level Memory it came up as "999." When I test now, however, the unit is reading "0".

How can it be possible that I have had a 999ppm reading and the alarm never went off? Could this be due to the error that was displayed today? The unit was safely plugged in when I checked, my only guess for what might have happened was a brief power surge/outage but my neighbors are saying they didn't have anything of that sort.

Just concerned and wondering what this machine is trying to tell me. I'm looking for a customer service number so I can check it myself.

(For reference, I'm not currently nor have I recently experienced any symptoms of C.O. poisoning, but for safety's sake I've opened my windows and done several Tests on the unit.)

Answer
Check you peak reading often, but 999 would be so lethal. I've heard anything more then 100 for a few minutes can be fatal. Most likely it was apart of your err. message. Mine reads a peak sometimes around 16, but the only time i've seen err or high numbers is when the battery is dead, and changing the battery/resetting the unit.

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Is it normal for a carbon monoxide detector to read 0 ppm?

carbon monoxide detector reads 0 image

dfjkdfj

I got a carbon monoxide detector, which reads 0 ppm. It has a feature that allows you to check the highest level within the past 24 hours, which also is 0 ppm. Is this normal? I thought there might be one or two ppm in the house.

Answer
It can read it. But f you want to know if it is working then it will either need to be calibrated by a professional (cheaper to buy a new one), or quick gut check take it to the hood of an 80% gas HW heater. It should give you some reading and I usually see above 9 when around a water heater.

Is it normal for a carbon monoxide detector to read 0 ppm?

dfjkdfj

Sorry for posting a second time, but the first question did not get any good answers. Is it normal for a carbon monoxide detector to read 0 PPM? I have one that shows the highest level over the past 24 hours, and whenever I check it always reads 0 PPM. Is this normal? I would think there might be one or two PPM in the house, considering the lowest level it would bother sensitive people is 30 PPM.

Answer
Actually in the 0 to 29 ppm level CO detectors are not allowed to display the actual CO level, and are required to display zero in that range according to CO alarm standards developed by Underwriters Laboratories (UL2034) in collaboration with the US Consumer Product Safety Commission. (The display and alarm specifications of UL2034 are matched in a Canadian standard, CSA 6.19-01)

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What is a high number on a carbon monoxide detector?

carbon monoxide detector reads 0 image

LINK

I have a Nighthawk carbon monoxide detector and what is a number to know so that i know it's dangerous and should get out? I know it goes off when theres carbon monoxide in the air but i wanna know the number just incase. And I just tested it to and it said 214 is that bad?

Answer
The nice thing about Nighthawk is that they have a digital readout of the CO level so that you can monitor it even if the CO level isn't high enough to trigger the alarm. Under normal circumstances, the display should always read 0. Now, there are things that could cause the reading to temporarily rise, like cooking with a gas stove or oven. But, after you are done cooking, the level should drop. If your detector is reading anything but 0 all the time, you need to find the source and have the problem corrected. I would normally red flag anything over 9 or 10 ppm. Although that is no where near lethal levels, it still indicates a problem. Long term exposure to low levels of CO is not good for you.

At what level does carbon monoxide become dangerous?

The Mrs.

After cooking on our new gas stove last night for approximately 30-45 minutes, my husband said that the carbon monoxide detector in our bedroom read a level of 15ppm. This is the highest we have seen it, generally speaking it doesn't go over 10ppm. At what point (in ppm) should we be concerned?

Answer
Any level of carbon monoxide is dangerous, it inhibits hemoglobin, myoglobin, and mitochondrial cytochrome oxidase (which are all VERY important!).

But typically, a concentration of as little as 0.04% (400 parts per million) carbon monoxide in the air can be fatal.

Below is a chart to help elaborate on the toxicity levels of CO and its symptoms:
* 35 ppm (0.0035%) Headache and dizziness within six to eight hours of constant exposure
* 100 ppm (0.01%) Slight headache in two to three hours
* 200 ppm (0.02%) Slight headache within two to three hours
* 400 ppm (0.04%) Frontal headache within one to two hours
* 800 ppm (0.08%) Dizziness, nausea, and convulsions within 45 minutes. Insensible within two hours.
* 1,600 ppm (0.16%) Headache, dizziness, and nausea within 20 minutes. Death in less than two hours.
* 3,200 ppm (0.32%) Headache, dizziness and nausea in five to ten minutes. Death within 30 minutes.
* 6,400 ppm (0.64%) Headache and dizziness in one to two minutes. Death in less than 20 minutes.
* 12,800 ppm (1.28%) Unconsciousness after 2-3 breaths. Death in less than three minutes.

In addition, a recent report concludes that carbon monoxide exposure can lead to significant loss of lifespan after exposure due to damage to the heart muscle.

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Wondering why my Kiddie Carbon Monoxide detector beeps every 10 minutes?

carbon monoxide detector reads 0 image

Riqui

For about the last hour my carbon monoxide detector has been beeping every 10 to 15 minutes, the numbers on the reading screen have not changed and still read 0. Any suggestions as to what the cause could be

Answer
The batteries more than likely need changed.

What is a high number on a carbon monoxide detector?

LINK

I have a Nighthawk carbon monoxide detector and what is a number to know so that i know it's dangerous and should get out? I know it goes off when theres carbon monoxide in the air but i wanna know the number just incase. And I just tested it to and it said 214 is that bad?

Answer
The nice thing about Nighthawk is that they have a digital readout of the CO level so that you can monitor it even if the CO level isn't high enough to trigger the alarm. Under normal circumstances, the display should always read 0. Now, there are things that could cause the reading to temporarily rise, like cooking with a gas stove or oven. But, after you are done cooking, the level should drop. If your detector is reading anything but 0 all the time, you need to find the source and have the problem corrected. I would normally red flag anything over 9 or 10 ppm. Although that is no where near lethal levels, it still indicates a problem. Long term exposure to low levels of CO is not good for you.

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At what level does carbon monoxide become dangerous?

carbon monoxide detector reads 0 image

The Mrs.

After cooking on our new gas stove last night for approximately 30-45 minutes, my husband said that the carbon monoxide detector in our bedroom read a level of 15ppm. This is the highest we have seen it, generally speaking it doesn't go over 10ppm. At what point (in ppm) should we be concerned?

Answer
Any level of carbon monoxide is dangerous, it inhibits hemoglobin, myoglobin, and mitochondrial cytochrome oxidase (which are all VERY important!).

But typically, a concentration of as little as 0.04% (400 parts per million) carbon monoxide in the air can be fatal.

Below is a chart to help elaborate on the toxicity levels of CO and its symptoms:
* 35 ppm (0.0035%) Headache and dizziness within six to eight hours of constant exposure
* 100 ppm (0.01%) Slight headache in two to three hours
* 200 ppm (0.02%) Slight headache within two to three hours
* 400 ppm (0.04%) Frontal headache within one to two hours
* 800 ppm (0.08%) Dizziness, nausea, and convulsions within 45 minutes. Insensible within two hours.
* 1,600 ppm (0.16%) Headache, dizziness, and nausea within 20 minutes. Death in less than two hours.
* 3,200 ppm (0.32%) Headache, dizziness and nausea in five to ten minutes. Death within 30 minutes.
* 6,400 ppm (0.64%) Headache and dizziness in one to two minutes. Death in less than 20 minutes.
* 12,800 ppm (1.28%) Unconsciousness after 2-3 breaths. Death in less than three minutes.

In addition, a recent report concludes that carbon monoxide exposure can lead to significant loss of lifespan after exposure due to damage to the heart muscle.

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

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Is it normal for a carbon monoxide detector to read 0 ppm?

carbon monoxide detector reads 0 image

dfjkdfj

I got a carbon monoxide detector, which reads 0 ppm. It has a feature that allows you to check the highest level within the past 24 hours, which also is 0 ppm. Is this normal? I thought there might be one or two ppm in the house.

Answer
It can read it. But f you want to know if it is working then it will either need to be calibrated by a professional (cheaper to buy a new one), or quick gut check take it to the hood of an 80% gas HW heater. It should give you some reading and I usually see above 9 when around a water heater.

Is it normal for a carbon monoxide detector to read 0 ppm?

dfjkdfj

Sorry for posting a second time, but the first question did not get any good answers. Is it normal for a carbon monoxide detector to read 0 PPM? I have one that shows the highest level over the past 24 hours, and whenever I check it always reads 0 PPM. Is this normal? I would think there might be one or two PPM in the house, considering the lowest level it would bother sensitive people is 30 PPM.

Answer
Actually in the 0 to 29 ppm level CO detectors are not allowed to display the actual CO level, and are required to display zero in that range according to CO alarm standards developed by Underwriters Laboratories (UL2034) in collaboration with the US Consumer Product Safety Commission. (The display and alarm specifications of UL2034 are matched in a Canadian standard, CSA 6.19-01)

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