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Smoke alarms are powered by battery or by your home's electrical system. If the smoke alarm is powered by battery, it runs on either a disposable 9-volt battery or a non-replaceable 10-year sealed lithium battery. Alarms that receive their power from your home's electrical system (hardwired alarms) usually have a back-up battery that will need to be replaced once or twice a year.
There are many special features that can help protect you and your home, or make your safety products easier to maintain and operate. Many of these features are not well known by their name, so to learn more about specific features of a model, select it and view its detail page.
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The Nighthawk KN-COB-B-LP battery operated carbon monoxide alarm is an easy to install unit that provides reliable protection against the dangers of carbon monoxide. Written information and instruction make this unit's operation easy for anyone to understand. The Nighthawk DC Basic alarm has a small sleek design that is suitable for all living areas and has a 10-year limited warranty.
The Nighthawk KN-COB-B-LP provides you and your family with a loud warning signal against the dangers of elevated carbon monoxide levels in your home. The battery operated CO alarm provides continuous monitoring of CO levels, even during power outages when AC-only units are not providing protection. The Nighthawk CO alarm has a 10-year product life, providing 40% longer protection than other CO alarms. The battery operated CO alarm includes multiple mounting options allowing installation on a wall or tabletop.
Part Number (Ordering Number): 900-0233
The carbon monoxide alarm shall be Kidde Unit Number KN-COB-B-LP (part number 900-0233) or approved equal. It shall be powered by three (3) AA batteries (included). The temperature operating range shall be between 40°F and 100°F (4°C and 38°C) and the humidity operating range shall be 10% - 95% relative humidity. The CO sensor shall be of a fuel cell design and shall meet the sensitivity requirements of Underwriters Laboratories UL2034 Single and Multiple Station Carbon Monoxide Alarms. The alarm can be installed on the surface of any wall or table top following the UL/NFPA/Manufacturer's recommended placement guidelines. The alarm shall include a battery lockout system that deters closure of battery door without using three batteries. The alarm shall include a test button that will electronically simulate the presence of CO and cause the unit to go into alarm. This sequence tests the unit's electronics to ensure proper operation. Per UL 2034 requirements, the CO sensor will not alarm to levels of CO below 30 ppm and will alarm in the following time range when exposed to the corresponding levels of CO. 70 ppm CO concentration 60 – 240 minutes 150 ppm CO concentration 10 – 50 minutes 400 ppm CO concentration 4 – 15 minutes The unit shall incorporate 2 LED's. A green LED will flash once every 30 seconds to indicate the alarm is operating properly when power is present. A red LED will pulse to indicate carbon monoxide has been detected until the device is reset or CO is eliminated. The alarm shall include a piezoelectric horn that is rated at 85 decibels at 10 feet. When the unit detects carbon monoxide, the alarm pattern will be four (4) short beeps – followed by five (5) seconds of silence – followed by four (4) short beeps with a corresponding red LED flash. It shall also include a 10-year manufacturer’s limited warranty. *Based on accuracy claims of major manufacturers
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