What are the characteristics of Classic Carbon monoxide alarm?

A classic carbon monoxide (CO) alarm typically has the following characteristics:

1. Sensitivity: It is designed to detect low levels of carbon monoxide in the air, typically between 30 and 70 parts per million (ppm).

2. Alarm Sound: When carbon monoxide is detected, the alarm emits a loud, distinct sound that can be heard throughout the home.

3. Power Source: Classic carbon monoxide alarms are typically battery-operated, but some models may also be hardwired into the home's electrical system.

4. Display: Some models may feature a digital display that shows the current carbon monoxide levels in the room.

5. Testing Feature: It usually has a test button that can be pressed to check if the alarm is working properly.

6. Maintenance: These alarms require regular maintenance, including battery replacement and periodic testing to ensure proper functioning.

7. UL Certification: Classic carbon monoxide alarms are certified by Underwriters Laboratories (UL), which is an independent organization that tests and certifies products for safety and performance. The UL certification ensures that the alarm meets the required safety standards.

Overall, a classic carbon monoxide alarm is a simple but effective device that can save lives by alerting occupants of the presence of this toxic gas in their home.