Digital Cooking Kitchen
Digital Cooking Kitchen
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Kitchen BBQ Digital Cooking Food Meat Probe Thermometer US $3.66
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Digital Kitchen Cooking Count Down Up Timer Alarm Clock US $3.05
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SALTER 392 DIGITAL MAGNETIC KITCHEN COOKING 4 WAY TIMER US $15.79
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Digital Cooking Food Probe Thermometer Kitchen BBQ US $4.92
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LCD Digital Kitchen Cooking Count down/Up Timer Alarm US $4.59
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Digital Probe Meat Thermometer Kitchen Cooking BBQ #4 US $3.73
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Digital Kitchen Count Down Up LCD Cooking Timer Alarm US $3.99
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LCD Digital Kitchen Cooking Count down Up Timer Alarm US $1.00
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LCD Digital Kitchen Cooking Count down Up Timer Alarm US $1.00
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Mini LCD Home Kitchen Cooking Count Down Digital Timer US $3.89
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New LCD Digital Kitchen Cooking Count down Timer Alarm US $1.99
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New LCD Digital Kitchen Cooking Count down Timer Alarm US $2.69
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New LCD Digital Kitchen Cooking Count down Timer Alarm US $1.25
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Mini LCD Digital Cooking Kitchen Countdown Timer Alarm US $1.92
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Digital Timer Stopwatch Kitchen Cooking Countdown Clock US $3.69
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Mini LCD Home Kitchen Cooking Count Down Digital Timer US $1.00
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LCD Digital Kitchen Cooking Count down/Up Timer Alarm US $4.59
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Mini LCD Digital Cooking Kitchen Countdown Timer Alarm US $1.93
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Digital Timer Kitchen Cooking Count Down Up Clock Alarm US $1.00
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Digital Automatic Pasta Cooking Timer Thermometer LCD Display Kitchen Home Cook US $9.99
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I have a nighthawk carbon monoxide detector, I have no idea what those digital numbers are for?
I was cooking in the kitchen today and I notice the number got up to 9 but the alarm did not go off. I just want to know about these numbers, I have no idea how far the numbers go. I thank you for your help.
If you can't find the manual, try looking up your model on the internet. The numbers *may* indicate parts per million of CO detected. It takes 1000ppm to cause unconsciousness in an hour, so 9ppm isn't good, but it is considered "normal" background CO.
Take a look at http://www.nfpa.org/itemDetail.asp?categoryID=280&itemID=18270&URL=Research+&+Reports/Fact+sheets/Home+safety/Carbon+monoxide+poisoning&cookie%5Ftest=1 for additional information.

US $5.77