Kidde Nighthawk Plug-In CO & Explosive Gas Alarm – 9V Backup, Digital Display

Smart protection for CO and explosive gases

The Kidde Nighthawk Plug-In Carbon Monoxide and Explosive Gas Alarm combines a compact plug-in design with advanced sensors to provide clear, actionable information on gas presence. It monitors carbon monoxide as well as explosive gases such as methane and propane, and the digital LED display shows the current CO level in parts per million while signaling GAS when gas is detected.

Easy setup with reliable backup

Install in seconds by plugging into a standard 120V outlet. A built-in 9-volt battery backup keeps monitoring active during power outages, ensuring you stay informed even when the grid is down. The low-profile unit can be rotated to stay upright regardless of outlet orientation, and a 6-foot extension cord adds placement flexibility.

Clear alerts you can trust

When elevated CO is detected, the display updates with the CO reading and the alarm emits a steady pattern to draw attention. If explosive gas is detected, the display shows GAS and the horn intensifies with a distinct cadence to help you recognize the situation at a glance. The display also stores the peak CO level since last reset.

Key features at a glance

• Plug-in convenience with battery backup
• Digital LED display for CO ppm and GAS indicator
• 85 dB alarm to alert across rooms
• Peak level memory to track recent CO events
• UL-listed and designed for home safety
• Rotatable plug and 6 ft extension cord for flexible placement
• Seven year life with five year warranty

Practical usage tips

Place on each level of your home, particularly near sleeping areas, kitchens, furnaces, and water heaters. The digital readout helps you monitor trends over time, while the audible alert encourages prompt review of appliances and vents. Regular testing keeps the unit ready for action.

What’s in the box

• Kidde KN-COEG-3 Nighthawk detector
• 9-volt battery
• Mounting hardware
• Installation guide