DeNova Detect 10-Year Battery Carbon Monoxide + Natural Gas Alarm - DD623NCV

The DeNova Detect DD623NCV is America's first and only 10-year battery-powered combination natural gas and carbon monoxide alarm. Designed for fast, reliable detection and equipped with a powerful speaker and LED system. With its 10% LEL alarm threshold, it helps safeguard lives by giving users more time to respond in emergencies.

This innovative alarm features MEMS hot-wire semiconductor technology for natural gas detection that is validated to detect explosive levels of gas faster than conventional plug-in alarms. In combination with an electrochemical CO sensor, this dual-sensor unit meets strict UL standards for accurate natural gas and CO monitoring.

Unlike traditional units, the DeNova Detect DD623NCV doesn't require an outlet or battery replacements. It also eliminates false alarms from everyday household chemicals, making it ideal for families, landlords, and utility partners.

The alarm speaks directly to the user with voice alerts in both English and Spanish, giving life-saving instructions like "Danger, gas leak explosion risk. Evacuate, then call 9-1-1" during a gas leak or "Danger! Carbon Monoxide Detected!" in the event of CO exposure.

The DeNova Detect Natural Gas Detector should be installed in all rooms where a gas leak may occur or a gas appliance is located. Mounts easily to any wall using the included screw or can be secured to a pipe with cable ties. For best performance and NFPA 715 compliance, install within 12 inches of the ceiling and 3 to 10 feet away from any gas appliances. No wiring or outlet access is required.

• Kitchen (gas leaks from gas ovens and cook tops)
• Laundry Room (gas leaks from a gas clothes dryer)
• Furnace area (gas leaks from furnace burners, water heaters or boilers)
• Room with a Gas Fireplace

atural gas is primarily composed of methane (CH₄), a colorless and odorless gas that is lighter than air. Because methane's molecular weight is about 16 compared to air's average weight of around 29, it naturally rises and accumulates near the ceiling when released indoors. This is why natural gas leaks often concentrate in upper areas of a room or along ceilings — especially in kitchens, utility rooms, or near gas appliances.

While utility companies add a sulfur-based odorant (mercaptan) to natural gas to help people detect leaks by smell, not everyone can rely on scent alone. Individuals with a reduced sense of smell, or leaks that develop slowly over time, may go unnoticed until gas levels become dangerous. A natural gas alarm continuously monitors the air for low-level gas concentrations and provides early warning before levels reach the explosive threshold — allowing valuable extra minutes to evacuate safely and call for help.

Because natural gas rises, alarms should be mounted high on the wall or close to the ceiling, near potential leak sources such as stoves, furnaces, or water heaters. Placing a certified natural gas alarm at the correct height ensures faster detection and compliance with NFPA 715 guidelines, which specify installation requirements for gas detection systems.

Natural gas alarms are a small but critical part of home and building safety. They not only detect leaks early but also reduce the risk of explosions, fires, and carbon monoxide exposure in homes that use gas for heating or cooking. Modern alarms - like DeNova Detect's 10-year battery-powered models - offer long-lasting protection without the need for outlets or battery changes, giving families, landlords, and utility partners a reliable safeguard against unseen hazards.