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Kidde 900-0234 Nighthawk Carbon Monoxide Alarm, Long Life AC Powered with Battery Backup and Digital Display | 
| Brand: Kidde
Category: Home Improvement
List Price: $96.99
Buy New: $39.49
as of 7/31/2010 07:06 UTC details
You Save: $57.50 (59%)
New (10) from $39.49
Seller: Closeouts America
Rating:  20 reviews
Sales Rank: 3022
Media: Tools & Hardware
Batteries Included: Yes
Shipping Weight (lbs): 1.9
Dimensions (in): 12.1 x 7.6 x 0.8
MPN: 21007309
Model: 900-0234
UPC: 047871073092
EAN: 0047871073092
ASIN: B001LF2L0U
Availability: Usually ships in 1-2 business days
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| Features:
| • | Digital display shows the level of carbon monoxide the unit is sensing so the unit updates this reading every 15-seconds | | • | Peak level button displays the peak CO level recorded by the alarm since it was last reset or unplugged | | • | 9-Volt battery backup provides continuous protection even during power outages | | • | Tamper resist feature unit goes into constant alarm mode if it has been unplugged or has come loose from the outlet | | • | 7-year end of life warning alerts user to replace CO alarm after 7-years of operation (40-percent longer than other CO alarms) |
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| Editorial Reviews:
Product Description
The Nighthawk, AC Powered, Plug-In Carbon Monoxide Alarm With Battery Backup, Easy To Install, Provides Reliable Protection Against The Dangers Of Carbon Monoxide, Written Information & Instruction, Operation Easy To Understand, AC/DC Basic Alarm Has A Small Sleek Design That Is Suitable For All Living Areas & Has A 7 Year Limited Warranty.
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| Customer Reviews:
Showing reviews 1-5 of 20
 No problems after 6 months July 23, 2010
Glenn Ware (Colorado USA)
I have had this unit in our bedroom for over 6 months with no issues. No false alarms and no backup batter issues, it just works or at least the display tells me so. I do like the display on these units rather then just a status light like other lower priced models. If you are looking for a higher quality carbon monoxide detector then I would sure take a look at this unit. I have had other Kidde Nighthawks with no problems as well. Just remember that after a number of years all detectors are no longer good and need to be replaced.
 Waste of money July 18, 2010
EEMueller
I purchased this unit as a backup to the gas and CO detectors that are wired into my central alarm system. In the 5 months that I've had this unit installed, it has false alarmed 4 times, each time indicating explosive gas. The last one was last night with a house full of guests. The other detector sensed nothing, and after reading some reviews, I found this type of failure with Kidde alarms is very common. This beauty is headed straight for the trash.
good CO detector, like the digital display and battery-backup July 11, 2010
Jiminy Cricket (downstate NY USA)
Both 2 of these to replace my 7-year-old Kidde CO detectors of a similar model, one per floor. They plug into any wall outet. I like the battery-backup and the digital CO level display. If you press a button, you can see "peak" CO level since the last reset. Am using these peak level readings to try to track down occasional very low levels of CO that are too low to be dangerous or trigger any alarm. I am pleased with these CO detectors. My only complaint is that I wish I could see the instantaneous low level CO readings [but such pro CO detectors normally cost much more].
One important point. There is something you have to do to prevent the unit from beeping every minute on battery backup if the AC power goes out. Follow the instructions to do that and you will like this unit much better as a result.
Good Product June 1, 2010
horsey girl
1 out of 1 found this review helpful
This is the first carbon monoxide detector I have ever purchased so I don't have any other experiences to compare it to. I've had it for a week and it seems to be working just fine. I really like the digital display that indicates "0" so I know that there is no carbon monoxide at all in the home. I'm assuming this is an accurate reading. (Hopefully!). It does seem like it is a quality product. I did use the test option to see if that worked and it did exactly what it was supposed to do.
I did take one star off because of the ear-splitting noise you have to deal with when you put the battery in and also if you unplug the thing from the wall. I nearly jumped out of my skin! As soon as you install the battery---Be prepared for the noise!! You will want to hold the button in the back---walk it over to the wall--and plug it in immediately.
I would recommend this product.
alerts at the 7-year mark, noisy unless you disable tamper-proof feature March 28, 2010
Omar Siddique (Ellicott City, MD USA)
3 out of 3 found this review helpful
Long-lived CO alarm requires replacement at the 7-year mark, and has an annoying tamper-resistant feature (but it can be turned off).
After learning that home carbon-monoxide sensors have a finite lifespan, I decided to replace my oldest Nighthawk (well past its "expiration" as far as I can tell), with one of this new product line that is supposed to be effective for longer.
I found a few interesting differences between this new model and my older ones. One is that while this model is rated to last 7 years, it actually has planned obsolescence-- at the 7 year mark (from 1st power-up), it begins to chirp every 15 seconds. That means in 7 years, you must replace or discard the unit. Since I doubt the sensor completely fails between 6yrs364days and 7yrs, this seems like an attempt by Kidde to ensure sales volume (or to reduce liability by picking a "safe" cut-off). I'd have been happier with the ability to either service the unit (replace the sensor rather than discard the whole), or just have a "replace unit" warning light. I'd think it better to have a unit working with diminished capability, than to have no unit at all.
There are also alarms tied to the unit receiving AC power, with the unit sounding a loud tamper-warning otherwise. Eg, once the unit has a battery in it and is plugged in, if you were to simply unplug the unit, it would sound a very loud, persistent alarm. So to move it, you have to hold down the test button for 2-seconds first, to get a 2-minute unplugged grace period before the tamper-siren sounds.
I'm not sure if this feature is aimed at consumers with small misbehaved children, or aimed at those paranoid about malicious actions, but it seems out of place in an adults-only household. Reading the manual, I did discover that this feature can be disabled (hold down the button on the back, and use a screwdriver to slide a recessed switch to a disabled position). I'm glad the "feature" can be disabled, but considering the number of reviews here that mention the tamper-alarm, this work-around seems non-obvious.
Like most recent alarm devices, this unit will beep regularly when it has a low battery (a feature not present in my oldest Nighthawk), but thankfully it does have the ability to silence that beeping (for 12 hours) by holding down the test button (since these batteries seem to always fail during the middle of the night).
The manual states that using the recommended brands of 9v batteries, this unit will run on battery-only
for 20 hours.
I haven't had any CO problems, but this unit seems like it'll do the job, but I dock 1-star for overly noisy warnings and planned obsolescence.
Showing reviews 1-5 of 20
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