1 Answer. There are three major types of carbon monoxide senors. Biomimetic: A gel changes color when it absorbs carbon monoxide. Metal oxide semiconductor: When the chip's circuit detects carbon monoxide, electrical resistance decreases, and this triggers an alarm. Electrochemical: Electrodes immersed in a chemical solution sense changes in
Sensors in Carbon Monoxide Detectors. Electrochemical sensors use a gel to detect CO. Electrochemical sensors are mainly used to detect Oxygen and toxic gas. They measure a chemical reaction within the sensor that creates an electrical output proportional to the CO level. Essentially, EC sensors are small fuel cells composed of noble metal
After an alarm is turned on for the first time, it should last approximately 7-10 years in normal operating conditions. This can vary slightly based on the model you own. Check your alarm's manual for the exact warranty period. If your alarm is more than 10 years old, it's time for a replacement. Note: First Alert's Smoke / CO Warranty begins Carbon monoxide, or CO, is a colorless and odorless gas commonly found in home appliances and vehicles. If you burn fuel in vehicles, small engines like lawnmowers, water heaters, clothes dryers HOWEVER, eventually at least until one of two things will happen…. 1. The batteries go dead. 2. It degrades – expires – due to its effective shelf life. Tip: A good habit: Replace smoke detector batteries during a notable time of the year such as the New Year, January 1. Otherwise, this might happen to you: Never ignore an alarming CO alarm! It is warning you of a potentially deadly hazard. If the alarm signal sounds do not try to find the source of the CO: Immediately move outside to fresh air. Call your emergency services, fire department, or 911. After calling 911, do a head count to check that all persons are accounted for. DO NOT reenter the
For indoor settings, the acceptable level of carbon monoxide is stated by WHO which recommends 9-10ppm for no more than 8 hours. 25-35ppm for no more than 1 hour and 90-100 ppm for no more than 15 minutes. Below we provide an easy to use reference for carbon monoxide levels chart. Download a copy of the chart here.
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    • how does co detector work