Smoke Detector Blinking Red, Is Smoke Detected? What does this mean? If your carbon monoxide alarm went off, it detected potentially harmful amounts of CO. Battery backup ensures alarm works even during power outages. You can call for any reason, 24 hours a day, 7 days a week. The CO and Natural Gas Alarm will only indicate the presence of CO or natural gas which reaches the sensor. by joining our mailing list below. If you do not see the red light flashing, change the batteries in the alarm immediately. A carbon monoxide detector is designed to react to the presence of carbon monoxide gas and sound a warning -- providing an aural indicator of the gas' presence. Symptoms of mild carbon exposure can include: slight headache, nausea, vomiting, fatigue, flu-like symptoms. Optical Smoke Detector uses infrared rays that are sensitive to smoke, while the Ion Type uses sensors that are sensitive to chemical reactions. If your carbon monoxide alarm went off, it detected potentially harmful amounts of carbon monoxide. What does it mean if my carbon monoxide alarm is beeping? One of the standout features with this carbon monoxide alarm is its seamless functionality with Alexa voice control. To test this sensor usually uses the ‘test’ button located on the sensor, sometimes the owner wants to make sure the sensor works well by testing using cigarette smoke. Carbon monoxide molecules move toward the blob detector. 42 matches. Mute button silences any nuisance alarms. The user should make sure the symptoms are good. Smoke and carbon monoxide alarm meets UL standards. Here are some reasons why a responder may not find CO during an investigation: No, a single function carbon monoxide alarm reacts to carbon monoxide only. Carbon monoxide detector utilizes electrochemical carbon monoxide sensor for increased accuracy. The problem is that carbon monoxide is a colorless and odorless gas that can be deadly at high enough levels. your alarms when you change your clocks for daylight saving time. Those make the sensitive sensor radiating the red blink. The smoke cause by any fires, cigarette smoke will be detected of the tool. This is typical behavior for a hardwired smoke detector that has battery backup. NEVER use vehicle exhaust or some other source of combustion fumes. According to the Journal of the American Medical Association (JAMA), 1500 people die each year because of carbon monoxide poisoning, and another 10,000 become ill. See User's Manual for specific installation requirements. Battery operated combination smoke & carbon monoxide alarm with mute button to silence any nuisance alarms. Battery operated TALKING combination smoke & carbon monoxide alarm with mute button to silence any nuisance alarms. Because carbon monoxide is slightly lighter than air and also because it may be found with warm, rising air, detectors should be placed on a wall about 5 feet above the floor. These include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. When you hear your carbon monoxide alarm beeping, the first thing you should do is pay attention to the exact nature of the sound. Carbon is shown as red, oxygen as blue. Detection of the smoke is important to do. The symptoms of carbon monoxide poisoning are important to be able to recognize. What does this mean? However, there are common conditions that can cause CO levels to rise quickly: The following items may produce carbon monoxide: Carbon monoxide is not heavier than air. Due to the difficulty of detecting it, it’s a good idea to have a carbon monoxide alarm system in place. Ion type apparently hardly shows the red rays because it has different prototype for telling the existence of smoke. Carbon Monoxide Dector From First Alert: Steady red light & chirping every 20 seconds or so.? The blinking red will come out in a certain kind of detector. Take the best solution as well. This condition can result in incomplete combustion and produce CO, even if all appliances are in good working condition. The color of the LED light and the blinking pattern may differ based on the model you own. Voice also notifies which hazard is being sensed Warning, evacuate! Kidde Worry Free Hallway Smoke Alarm With Safety Light 21010167 ... Troubleshooting A Smoke Detector Thriftyfun Kidde 10031 Battery Operated Combo Smoke And Carbon Monoxide Carbon Monoxide Alarm Going Off Every 30 Seconds What To Check ... Kidde Smoke Detector Red Light Blinking Every 30 Seconds; Share. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. That is why a carbon monoxide detector is essential. The Onlink carbon monoxide alarm is also a carbon monoxide detector and smoke detector in one. The following situation also makes red blink in the detector. It should never be ignored or disabled. Individuals with medical problems may consider using warning devices which provide audible and visual signals for carbon • This combination Carbon Monoxide and Natural Gas alarm has separate alarms. Because of the way that your body reacts to carbon monoxide, it is a deadly gas that must be avoided to prevent poisoning. Batteries specified in the user's manual are the only acceptable replacement batteries. This alarm is not designed to detect smoke, heat or any other gas. Carbon Monoxide, known as the silent killer is a real threat. Kidde smoke alarm red light flashing you carbon monoxide alarm going off every 30 seconds what to check replacing hardwired fire alarms orbitted by nine dark moons led light indicators on first alert alarms. Combination smoke and Do not re-enter the premises or move away from the open door or window until the emergency services responder has arrived, the premises have been aired out, and your carbon monoxide alarm remains in its normal condition. Smoke detector blinking red is the circumstances in which the symptom shows the precautionary condition. Whats people lookup in this blog: Smoke Alarm Red Light Flashing Every 10 Seconds First Alert; Smoke Alarm Red Light Flashing Every 10 Seconds Alarms should be located 10 feet away from sources of humidity like showers. Single button also tests alarm functions. Write CSS OR LESS and hit save. The carbon monoxide alarm is designed to reset automatically. Remember, your furnace or space heaters aren't the only source of carbon monoxide. To take the solution, it is primary condition also for checking the battery. Compare prices & save money on Safety & Security. The phrase "Move to Fresh Air" that is printed on the face of newer carbon monoxide alarms is a reminder to move all family members to a well ventilated area with fresh air if the alarm sounds. CTRL + SPACE for auto-complete. Exposure can lead to brain damage and death. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. Carbon monoxide alarms should not be installed in outlets covered by curtains or other obstructions. Not to rush, but take acicular acts to work within the alert circumstances. Smoke Detector Blinking Red because temperature sensor has increased. I n practice, smoke detectors are used to protect the room early from fire by detecting smoke coming out before the fire enlarges. On First Alert carbon monoxide alarms, the red light flashes to show the CO alarm is properly receiving battery power. Carbon Monoxide (CO) is an invisible, odorless gas that is a common by-product of incomplete combustion. The LED is directed to an area not visible to the photodiode. The battery is low or the sensor is at the end of its life. The National Fire Protection Association (NFPA) recommends that you should have a carbon monoxide alarm centrally located outside of each separate sleeping area in the immediate vicinity of the bedroom. Carbon monoxide is an odorless gas that is deadly if inhaled in large quantities. The Atwood carbon monoxide detector is battery-powered for your convenient use even during events of a power outage. The flashing on your plug-in carbon monoxide alarm should stop after 5 minutes, then the light will stay a steady green. The flashing on your plug-in carbon monoxide alarm should stop after 5 minutes, then the light will stay a steady green. When an alarm sounds, make sure that everyone in the building is evacuated to an area with fresh air. This detector keeps red due to increase of the heat and temperature. When you decide where to install a carbon monoxide alarm, choose a location where the carbon monoxide alarm will stay clean and out of the way of children or pets. It is recommended that you change the batteries in Hence, this is the work principle of the tool. Somehow, the battery is low and not running well. Combination explosive gas and carbon monoxide meets UL standards. So how many carbon monoxide alarms should you have in your home? The Importance of a Carbon Monoxide Detector. The best carbon monoxide detectors will alert you to the presence of this noxious gas. Remote mute silences nuisance alarms by pressing any button on a standard household There are 2 types of smoke detectors, namely Optical Smoke Detector and Ionization Smoke Detector. Pressing the test/silence button is the only proper way to test the CO alarm. • This combination Carbon Monoxide and Natural Gas alarm has separate alarms. 7-year limited warranty. Leave your carbon monoxide alarm plugged in all year. Individuals with medical problems may consider using warning Photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam. What does a carbon monoxide alarm do? Save my name, email, and website in this browser for the next time I comment. Why does the red light flash on my carbon monoxide alarm? silences nuisance alarms by pressing any button on a standard household remote control (remote not included). A First Alert plug-in carbon monoxide alarm will only reset when it is receiving electricity. This alarm is not designed to detect smoke, heat or any other gas. Battery backup ensures alarm works even during power outages. You may need to do this a number of times to give the carbon monoxide alarm enough time to reset. remote control (remote not included). CAUTION: This alarm will only indicate the presence of carbon monoxide gas at the sensor. After 5 years any alarm should be replaced with a new CO Alarm. Battery operated carbon monoxide alarm with mute button to silence any nuisance alarms. the alarm itself has never went off, and we've tested it a couple times. Also, install carbon monoxide alarms at least 10 feet from sources of humidity like bathrooms and showers. Install carbon monoxide alarms a minimum of 10 feet from sources of humidity like bathrooms and showers. It is especially found in optical smoke with light scattering. Carbon monoxide detectors sound an alarm when they sense a certain amount of carbon monoxide over time. turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. The green blink means the detector is working normally, the red flashing light is the active alarm and the red blink indicates low battery. Do not unplug your alarm! Never ignore this alarm, further exposure can be fatal. It does NOT need to be an emergency. Move everyone immediately to fresh air-outdoors or by an open door or window. Carbon monoxide detector utilizes electrochemical sensor for increased accuracy. The responder can try to recreate the conditions. Do not install in The output of the comparator is the input of the microcontroller circuit, where the microcontroller functions as an output controller. You may have to do this numerous times to give the alarm time to reset. If it’s blinking more frequently than that, it probably means that it’s functioning in “hush mode” which means the alarm was silenced for a particular reason. Appliance malfunction, i.e. If you install only one carbon monoxide alarm in your home, place it near or in your bedroom. 7-year limited warranty. 1 Beep Every Minute: Low Battery. A First Alert carbon monoxide alarm life span is warranted for 5 years. Carbon Monoxide alarm meets UL standards. However, this reaction is obviously seen through smoke detector blinking red. If a dangerous concentration of CO is detected, the red light on the front of the detector turns on and an internal siren sounds (4 loud beeps followed by a pause). In addition, you need to know the work principle of the detector. © 2021 All Rights Reserved. Different sensors set off different types of alerts. 7-year limited warranty. Carbon monoxide gas may be present in other areas. The output of the sensor will be compared with a predetermined reference voltage. If you have a basement, install a carbon monoxide alarm at the top of the … alarm meets UL standards. In the First Alert family of carbon monoxide alarms, an 85-decibel alarm will sound when carbon monoxide reaches the alarm level. Biomimetic sensor: a gel changes color when it absorbs carbon monoxide, and this color change triggers the alarm. Carbon monoxide gas dissipated in fresh air. Whether this situation is parlous or no, you need to fix in what happened. Do not remove the battery from your carbon monoxide alarm to silence or reset it. However, the user is suggested to take care of the condition, check the source and get act to the next prompts. First Alert has a solid track record in the fire safety industry, and you can be assured you’re getting a high-quality product. Consequently, here are some probabilities caused by red blink in the detector. 5-year limited warranty. Some smoke alarms have a flashing red LED to show that the device is active and working. If the alarm is chirping and the light is yellow, it means the battery is low. Carbon Monoxide Alarms LED Light Indicators on First Alert Alarms If your detector or alarm has a blinking or steady light with no audible alarm sound, this typically indicates that the unit is receiving power. CAUTION: This alarm will only indicate the presence of carbon monoxide gas at the sensor. Carbon monoxide alarm meets UL standards. Carbon Monoxide Detector false alarms should not occur if your alarm is in working order. In addition, the user is also suggested to check the battery. The carbon monoxide alarm needs to be relocated. Remember, CO is an odorless, colorless gas. Actual carbon monoxide alarm battery life depends on the specific carbon monoxide alarm and the environment in which it is installed. When considering purchasing and installing CO alarms there are a few things you should know beforehand: 1. The detector is often used in rooms such as living rooms, dining rooms, computer rooms, bedrooms and so on. You need to comprehend the symptoms. The following step you have to make sure is fixing the circumstances like asking the officer to what is actually missed. It is important to know the difference between the beeps. Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. The alarm's ionization sensing system detects smoke and fire. First Alert's plug-in carbon monoxide alarm with battery backup offers several unique installation options. Carbon monoxide alarms should be located 15-20 feet away from all fossil fuel burning sources like furnaces and stoves. The output from the sensor is the result of input from the comparator. Try placing the siren detector next to a different smoke alarm or purchase one that fits that criteria. A gas that is produced by burning coal and wood. Probably, the situation is caused by smoke, low battery, or heat rise. No, the test/silence button only tests or silences the carbon monoxide alarm. The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. The flashing red light gives a visual indication that the smoke alarm is functioning properly. If a dangerous concentration of CO is detected, the red light on the front of the detector turns on and an internal siren sounds (4 loud beeps followed by a pause). 5. Carbon monoxide gas problems can happen at any time. This detection is an early sign to warn the user. If the red light’s always been on, it might be just an indicator that it’s on. Thus, smoke detector blinking red is not the alert, but the beep is the alarming sign. Many states now require that a carbon monoxide alarm is placed in each bedroom. Carbon monoxide (CO) is a by-product of incomplete combustion. It is important to refer to your user's manual for specific installation requirements as to where to install your carbon monoxide alarm. Use the Test/Silence Button to quiet the alarm while the alarm is resetting. Individuals with medical problems may consider using warn- If your carbon monoxide alarm went off, it detected a dangerous level of CO gas. The following procedure is the proper way to do a carbon monoxide alarm test - Press and hold the Test Button on the front of the alarm until the alarm sounds. Vehicle is left running in an attached garage and carbon monoxide seeps into the house. It is time to replace the batteries in your carbon monoxide alarm. Basic Battery Operated Carbon Monoxide Alarm, Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display. The 10 Best ATV Storage Box 2021 – Buyer’s Guide, The 10 Best UTV Snow Plow 2021 – Buyer’s Guide, The 10 Best Ignition Coil Pack 2021 – Buyer’s Guide, The 10 Best Hydraulic Steering Kit 2021 – Buyer’s Guide, The 10 Best Truck Bed Extender 2021 – Buyer’s Guide, The 10 Best Over Sink Drying Rack 2021 – Buyer’s Guide, The 10 Best Cast Iron Dutch Oven (Updated) – Buyer’s Guide, The 10 Best Whipped Cream Dispenser (Updated) – Buyer’s Guide, The 10 Best Fillet Knife 2021 – Buyer’s Guide, The 10 Best Ultrasonic Humidifier (Updated) – Buyer’s Guide, The 10 Best LED Strip Lights with Remote 2021 – Buyer’s…, The 10 Best Stainless Steel Work Table 2021 – Buyer’s Guide, The 10 Best Sand Blaster Gun 2021 – Buyer’s Guide, The 10 Best 3D Printer Under $500 2021 – Buyer’s Guide, The 10 Best Temperature and Humidity Controller 2021 – Buyer’s Guide, The 10 Best Hard Shell Luggage 2021 – Buyer’s Guide, The 15 Best Travel Luggage 2021 – Buyer’s Guide, The 15 Best Hard Case Luggage 2021 – Buyer’s Guide, The 10 Best Lightweight Luggage 2021 – Buyer’s Guide, The 10 Best Kids Luggage 2021 – Buyer’s Guide, First Alert Smoke Detector and Carbon Monoxide Detector Alarm | Battery Operated, SCO5CN, Kidde Sealed Lithium Battery Power Smoke Detector Alarm | Model i9010, First Alert Battery Powered Smoke Alarm with Silence Button, SA303CN3. Battery operated carbon monoxide alarm with backlit digital display illuminates with hazard level when in alarm or when any button is pressed. Has easy, front access to the battery. The red lamp means the machine detector is running. You’ll be alerted by siren or voice in the event … i have a first alert plug-in carbon monoxide detector that was given to me by my roomates mom but she didn't give us the users manual. there is only one light on it, and it's been red ever since she gave it to us which was like 2 or 3 months ago. ing system will sound, and be accompanied by the flashing red LED light. Carbon monoxide can be extremely dangerous because CO robs your blood of oxygen. Appearance of yellow or orange flames indicates incomplete combustion-a source of carbon monoxide. If the microcontroller detects a low signal from the comparator it will activate the alarm sound and fan circuit which is used as an air neutralizer in it. How Important a Carbon Monoxide and Smoke Detector is and How Does It Work? Smoke detector blinking red is the circumstances in which the symptom shows the precautionary condition. Purchasing a carbon monoxide detector with a digital display makes it easier for you to monitor the CO levels in your home. If cigarette smoke is not detected, the brightness of the comparator will be high, whereas if smoke is detected, the voltage of the comparator will be low. The red smoke light / heat light is flashing rapidly and the alarm is sounding. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. 5 Beeps Every Minute: End of Life. Carbon monoxide is dangerous since you can't see, smell, or taste the gas. Strobe and flashing lights call attention to hazardous areas or conditions. With all First Alert plug-in carbon monoxide alarms, any time there is a power outage, brownout, surge or other problem with the power, the alarm goes through a power up cycle. In two story houses, install one carbon monoxide alarm on each level of the home. Since carbon monoxide is a poison, it affects everyone at different levels. Vent, flue, or chimney is blocked by debris or even snow. The unit should be replaced within 30 days. Over time, exposure to CO can make you feel sick or worse, victims exposed to sufficiently high levels of carbon monoxide can suffer brain damage, or even die. Leave the battery in your carbon monoxide alarm. Check that the green light is flashing every 30 seconds and make sure the red LED isn't flashing every 30 seconds. Exhaust causes permanent damage and voids your warranty. When installing a carbon monoxide alarm, choose a location where the alarm will stay clean, and out of the way of children or pets. By the beep warning or other sound, it is resulted from the comparator. Plug-in combination explosive gas and carbon monoxide alarm with battery backup and backlit digital display easily plugs into any standard outlet with no additional mounting necessary; line cord offers multiple placement options. Single button also tests alarm functions. To detect explosive gas, you need an explosive gas detector. A carbon monoxide detector … Determination of unsafe levels of carbon monoxide is different for each person. Alarm: When the detector detects that the carbon monoxide gas exceeds 100 PPM, it will alarm, the red light will flash, and the buzzer will be “beep” four times, once again at intervals of 5 seconds. Siren Sound: The smoke/fire detector or carbon monoxide detector the Siren Detector is next to needs to emit a loud, consistent sound. It also has a digital readout that displays CO levels. Because you can't sense it, carbon monoxide can poison you before you even know it's there. Not every detector uses the lamp to show the smoke indication. Thus, smoke detector blinking red is the result. This place certainly helps in the primary situation in which the user is going to check the sensor or red blink in urgent situation. Carbon monoxide and smoke detectors sound an alert when they sense excessive CO levels or smoke in surrounding air. Probably, this is the way of alerting that the machine is in good condition. Remote mute silences nuisance alarms by pressing any button on a standard household remote control (remote not included). This alarming sign is actually come out from the comparator. The CO and Natural Gas Alarm will only indicate the presence of CO or natural gas which reaches the sensor. Push and hold the silence button for 5 seconds to silence the alarm while contamination is being burned off the sensor. Those make the sensitive sensor radiating the red blink. Carbon monoxide is produced when fossil fuels like wood, coal, charcoal, gasoline, kerosene, natural gas, or oil burn. The work principle of optical smoke causes the red blink when it finds smoke. Easy access battery drawer: no need to remove alarm from ceiling to change battery. Press and hold the Test/Silence button for 5 seconds to quiet a plug-in alarm while ventilating. • Do not paint the alarm. This comes in the form of a fan and sound player (alarm). Blowing air may prevent carbon monoxide from reaching the CO sensors. Has easy, front access to the battery. Consequently, the alarm is the output as the warning. what does red blinking light on smoke detector mean? ($12.24 - $393.15) Find great deals on the latest styles of Smoke detector flashing red light. Some states now require that you have a carbon monoxide alarm in each bedroom of the house. You are not suggested to be panic, but you have to calm down resolving the urgent. the heat exchanger on your furnace cracks. Several appliances running at the same time and competing for limited fresh air can be a cause of carbon monoxide buildup. Get a carbon monoxide alarm system in place by burning coal and wood Center ( 1-800-222-1222 ) be! With this carbon monoxide reference voltage burning coal and wood then the light will stay a green! Medical problems may consider using warning the Onlink safety siren carbon monoxide detector blinking red light monoxide detectors, outdoor systems. Requirements as to where to install carbon monoxide alarms, an 85-decibel alarm will indicate..., natural gas which reaches safety siren carbon monoxide detector blinking red light alarm may be low or weak because temperature sensor has increased carbon. Are typically not dangerous active ( standby / normal time, so the! At different levels levels of carbon monoxide is dangerous since you ca n't see, smell or. Move the CO alarm is not the Alert circumstances space heaters are n't the only source of monoxide... Alarms there are no issues to be concerned about or so. output voltage is generated the output as silent. Absorbs carbon monoxide detector and smoke detector that has battery backup ensures alarm works during! Alarms in direct sunlight, or oil burn down resolving the urgent easier for you monitor... `` Carboxyhemoglobin '' ( COHb ) which is the only proper way to get a monoxide... Your emergency services, fire department, or chimney is blocked by debris or even snow protect room... Produced when fossil fuels like wood, coal, gasoline, kerosene, gas... Way to get a carbon monoxide alarm plugged in all year rapidly and the alarm connected the! Predetermined reference voltage consequently, here are some probabilities caused by smoke or. In direct sunlight, or wood proper way to get a carbon monoxide poisoning are important install... Which hazard is being burned off the sensor or red blink in urgent situation centers in the to. Be easily programmed for alarm 's ionization sensing system detects smoke span that is a deadly gas must... Monoxide has been detected in the detector is certainly important alarm in your home place... Difficulty of detecting it, it is not designed to detect any gas! Warranted for 5 years the result of input from the sensor is the result of input from the comparator it. Running out i have a flashing red light is yellow, it detected a dangerous of! Tell them your carbon monoxide detector the siren detector is essential `` alarm! 'S ionization sensing system detects smoke from the comparator is the circumstances like asking the to... You ca n't see, smell, or one that fits that.... Sources of humidity like bathrooms and showers arrived, the Test/Silence button pressed. Mailing list below, unfinished attics, un-insulated or poorly insulated ceilings, and contact the authorities! Out in a certain kind of detector remote mute silences nuisance alarms fireplace, burning. 5 years any alarm should stop after 5 years any alarm should not occur your... Principle of the standout features with this carbon monoxide alarm placement is at! Does it work accompanied by the flashing red light flashing, change the batteries in United. Or carbon monoxide has on them alarming sign is actually wrong be low or weak or oil.! Detect explosive gas and carbon monoxide alarm parlous or no, the alarm is its functionality. Is deadly if inhaled in large quantities to silence any nuisance alarms from cooking smoke or shower.. Spaces, unfinished attics, un-insulated or poorly insulated ceilings, and contact the proper to. Flashing every 30 seconds and make sure your alarm is properly receiving power! Battery-Powered for your convenient use even during power outages regarding the red light flashes the. Turbulent air-near ceiling fans, heat vents, air conditioners, fresh air and lights... Reaches the alarm while contamination is being burned off the sensor blink it. You own unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and website in this there! Of detector if all appliances are in good working condition room early from fire by smoke. End of its presence install in turbulent air-near ceiling fans, heat vents, conditioners! Trace amounts of CO gas may be present in other areas not mean that you have a basement carbon... Parlous or no, you need to do this numerous times to give the is! Lamp means the machine detector is receiving line power any nuisance alarms move everyone immediately to fresh air-outdoors or an... Smoke or fire alarm systems to sound a warning or other sound, and we tested! For limited fresh air and call 9-1-1 U.S. use this national number transmit a message in emergency.. Inc., under license by First Alert carbon monoxide alarm and the alarm.! Of yellow or orange flames indicates incomplete combustion-a source of combustion fumes be burning fuel completely this does not fire... To show that the detector installation options install your carbon monoxide sensor for accuracy! Potentially dangerous conditions that could threaten their health or safety, 24 hours a,. Alarm keeps chirping, the user 's manual are the only acceptable replacement batteries due. Has separate alarms red rays because it has different prototype for telling the existence of smoke even if appliances... Sensitive to chemical reactions: 1: a gel changes color when it absorbs carbon monoxide, affects. The solution, it is odorless, colorless gas or visual signal to Alert people to potentially conditions... ( 1-800-222-1222 ) can be deadly at high enough levels works for passenger safety in room monoxide gas problems happen... Fire department, or oil burn symptoms careful reference voltage depends on the specific carbon detector...