Ensure the safety of your home or workplace with the Duomo CHCO Combined Carbon Monoxide and Gas Alarm. This state-of-the-art dual sensor detector provides reliable protection by sensing both methane and carbon monoxide. When either gas is detected, an audible alarm is triggered, ensuring immediate awareness and action. The CHCO is designed with a volt-free contact system that differentiates between the types of gas detected. These relays can be used to isolate the gas solenoid valve's electrical supply or provide remote indications, enhancing safety measures. Microprocessor Control: Advanced microprocessor technology for accurate detection and reliable performance. Dual Detection: Detects both Carbon Monoxide (CO) and Natural Gas (methane), ensuring comprehensive safety.