Top 6 Best Smart Gas Detector

Retractable Gas Leak DetectorThe TopTes PT299 gas leak detector is a dependable and portable tool that allows you to adjust the pole's length, reaching the desired testing location for accurate detection of combustible gas leaks, including propane, methane, natural gas, LPG, gasoline, and more. Note Please wait for a 30-second warm-up time before operation. Telescope Pole for Easy AccessThe PT299 natural gas detector helps you detect gas leaks in hard-to-reach areas such as pipelines, storage tanks, fireplaces, basements, and RVs. Extend the pole for gas leak inspection without getting too close to potential leakage points. Extension Range 2.20 inches to 6.30 inches. Alarm See HearWhen gas is detected, the PT299 responds in just 0.5 seconds. A visual and audible alarm promptly warns you of danger. Watch as 9 analog bars rise and the screen turns red, providing real-time feedback on gas concentration. The 75dB buzzer helps pinpoint gas leak locations. Detection range 1LEL to 10LEL 100 to 5,000ppm, based on Methane. User-FriendlyFeatures a 30-second preheat countdown indicator and a low battery alert. When enabled, the PT299 gas leak detector automatically turns off after 5 minutes of inactivity to save energy. Additionally, it is designed with a non-slip texture and material, ensuring a secure and comfortable grip. What You GetIncluded in your package are 1 PT299 Gas Leak Detector, 2 AAA Batteries, 1 Storage Bag, and 1 User Manual. We provide a 36-Month after-sale service and lifetime technical support. Please do not hesitate to reach out if you have any questions or concerns.

Combustible Gas Leak Detector TOPTES PT177 is a useful little tool that helps every household who has gas appliances to quickly and easily pinpoint leakage of combustible gas including LPG, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, liquefied natural gas, etc. It will save a ton of time and potentially reduce energy bills. Easy to Use, Visual Audible Alarm All you have to do is load the provided batteries, let PT177 gas detector finish its 30-second automatic calibration process, and then point near where you suspect the leak to be hold it a couple of centimeters away. PT177 detects gasses and alarms almost immediately within 0.5 to 3 seconds. Five red LEDs visual and 75dB audible alerts that increase with gas concentration. Compact Design Pocket-sized with a pocket clip that allows you to carry it in your shirt pocket. The included storage bag makes the natural gas detector easy to store. It is an excellent tool for RV-ers, DIY-ers, homeowners with gas appliances, etc. It's very convenient and perfect for regular safety checks. User-Friendly Features When the battery voltage is below 2.4V, the power indicator light will flash to remind you to replace the battery in time. If inactive for 5 minutes without operation or detecting gas, PT177 will automatically turn off. Detection range 50 to 1,000 ppm based on Methane. What You Get1x PT177 Gas Leak Detector, 1x Drawstring Carry Bag , 2x AAA Batteries, and 1x User Manual. Combined with Amazon's excellent delivery service, we provide a 36-Month after-sale service and lifetime technical support. Please feel free to contact us if you have any questions or concerns.

Carbon Monoxide DetectorTopTes CT-300 is an ideal portable CO tester to help you detect CO gas concentrations timely and accurately, reducing the risk of CO poisoning and protecting your life. It is a must-have tool for homeowners, drivers, campers, DIY-ers, tourists, etc. Swift Precise MeasurementThe CT-300, with an advanced electrochemical sensor head, swiftly detects CO levels from 0-5000 ppm. Its sensitivity ensures early warnings, allowing timely actions to prevent health risks. Accurate readings empower quick decisions, promoting safety and well-being. Versatile and portable, it guards against CO in various settings, ensuring peace of mind. Visual Audible AlarmThe travel CO detector uses both visual and audible alarms. When the concentration of CO reaches the alarm threshold, the screen changes color and emits an urgent alarm sound to alert you of the presence of CO gas in your surroundings, allowing you to promptly detect the danger, protect yourself. User-Friendly FunctionsWith high-quality ABSPC material and anti-slip edge texture, CT-300 is durable and portable It can be used for 40 hours with new batteries Low-power indicator will remind you of time to change batteries It will automatically switch off when not in operation or when no gas is detected within 10 minutes to save power Backlit screen for easy viewing, adaptable to dim environments. What You Get You will receive 1x CT-300 Carbon Monoxide Detector, 1x Protective Case, 3x AAA Batteries, 1x User Manual. We also provide a 36-month after-sale service and lifetime technical support. Please feel free to contact us if you have any questions or concerns.

Rechargeable Gas Leak Detector TopTes PT520B Gas Detector could quickly and accurately detect gas leaks from hard-to-reach areas for methane, propane, natural gas, LPG, etc. PT520B could recharge more than 3000 times. Note Please allow 30 seconds of warm-up time before the operation. Visual Audible Alarm TopTes PT520B could respond to gas leaks in 0.5s. The current gas concentration will be displayed in PPM or LEL in four-digit reading. Besides, 11 colored bars and 75dB alarm will warn you out of danger and lead to gas leakage. Visual and audible alarm will react seriously as the gas concentration increase. Detection Range 50-10000ppm. Flexible 17-inch Probe TopTes PT520B could detect any hard-to-reach area with a 17-inch gooseneck like gas stoves, natural gas lines, and basements. High and Low sensitivity could promote more accurate detection. Once gas leaks detected, you could turn it zero by ZERO button. User-Friendly ChoiceTopTes PT520B gas leak detector adopts anti-slip housing and ergonomic grip design. Mute button could dissolve annoying high-dB alarm. Temperature sensor offers more reference for accurate gas detection. With 10-min inaction, the detector will turn off to save the power. What You Get 1xPT520B Gas Leak Detector, 1x Micro USB line, 1x Protective case, 1x User Manual. We offer a 36-month after-sale service and lifetime technical support. Feel free to ask assistance from TopTes.

Rechargeable Gas Leak DetectorWith over 3000 recharge cycles, the TopTes PT520A gas sniffer can reliably and durably detect gas leaks, including methane, propane, natural gas, and LPG, even in hard-to-reach locations. Please wait for 30 seconds for the preheating time before operating. See and Hear, Quick Gas Leak DetectionThe PT520A gas detector reacts to combustible gas leaks in just 0.5 seconds. When gas is detected, seven colored bars and a 75dB audible buzzer will warn you of gas leaks. As gas concentration increases, the audible and visual alerts become more pronounced. Detection Range 50-10,000PPM. Bendable Gooseneck, Simple to LocateEquipped with a 17-inch gooseneck, the PT520A allows you to easily detect gas leaks in hard-to-reach positions, such as water heaters, dryers, kitchen stoves, fireplaces, and propane grills. The lengthy, bendable sensor tip lets you measure gas levels without getting too close. User-Friendly DesignThe PT520A natural gas detector automatically turns off after 10 minutes of inactivity to save energy. Press the APO button to cancel or activate the auto power-off function. Moreover, the audible alarm can be muted using the Mute button to minimize disruptive alarm noise. Easy to hold and wear-resistant, the PT520A features a double-sided bar-shaped groove design and non-slip material. What You GetYou will receive 1xPT520A Gas Leak Detector, 1xProtective Case, 1xMicro USB cable, and 1xUser Manual. We offer a 36-Month after-sale service and lifetime technical support. Please feel free to contact us if you have any questions or concerns.

Portable Probe DesignThe TopTes PT210S Gas Leak Detector features a convenient 4-inch probe and a portable pen-shaped design, allowing you to carry it effortlessly to detect hard-to-reach areas. It empowers you to swiftly identify combustible gases such as propane, natural gas, methane, and butane. Gas Reading in LELThe PT210S gas leak detector displays the current gas leakage in LEL with a clear two-digit reading. In the event of a gas leak, the LEL reading precisely indicates the gas leakage severity, reducing the risk of gas explosions and safeguarding your family and property. Visual and Audible AlarmsPT210S gas leak detector could quickly find leaks in 0.5 seconds. As leaks are detected, the screen will turn red, and bar graphs will rise. A 75dB audible buzzer would warn you of leaking dangers. With gas concentration rising, audible and visual alarms would turn more serious. Detection Range 100ppm5,000ppm 1LEL10LEL. User-Centric DesignPT210S features dual-mode detection high sensitivity and low sensitivity. When the battery voltage drops below 2.5V, the low battery indicator light will flash, reminding you to replace the battery promptly. Additionally, the detector will automatically shut off after 5 minutes of inactivity to conserve energy. Its anti-slip design ensures a comfortable grip. What You Will Get In the package, you will receive 1x PT210S gas leak detector, 1x Storage Bag, 1x Multi-language User Manual, and 2x AAA Batteries. Three-year warranty will be offered, and lifetime technical support will be included. Please feel free to contact us if you have any questions or problems.

Combustible Gas Leak DetectorThe TopTes PT199 is suitable for LPG, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, liquefied natural gas, etc., and it will exactly pinpoint a leak, reducing the risk of gas explosion and keeping your family and property safe. Visual Audio Gas AlarmThe gas detector employs both visual alarm and audible alarm as fast as 0.5 seconds of detection. When the bar graph increases and the detector beeps, you know gas has been detected. The alarm increases with the amount of gas, and the LCD screen will turn red when the gas concentration is high. Batteries Included Easy to UseThe TopTes PT199 comes with 2x AAA Alkaline Batteries, so you will be able to set the detector up and have it ready as soon as you receive it. The system warm-up time is about 30 seconds. The low battery indicator will engage when battery voltage is below 2.4V. Automatic power off after 5 minutes without operation or gas detection. Compact DesignPocket-sized with a pen hook that allows you to carry it in your shirt pocket. The non-slip texture and material make it easy to hold. With included storage bag, the natural gas detector is also easy to store. It is a great tool for RV-ers, DIY-ers, homeowners with gas appliances, and so on. Saves you from paying hundreds of dollars in diagnostics or wasting gas in an undetected leak. What You Get1x PT199 Gas Leak Detector, 1x Storage Bag, 2x AAA Batteries, 1x User Manual. Combined with Amazon's excellent delivery service, we provide a 36-Month after-sale service and lifetime technical support. Please feel free to contact us if you have any questions or concerns.

2.4 GHz Wi-Fi Connection Easily connect this electrochemical CO alarm to the X-Sense Home Security app on your smartphone via a 2.4 GHz Wi-Fi network, without the need for a hub download the app, sign up, and connect the device. Instant Notifications Stay connected to your alarm and view all its notifications, including its CO alarm, low battery, malfunction, CO alarm precaution, and more the Device Sharing function lets you add your family members so you can all keep an eye on your home's safety. Customized Fire Alarm Dispatch Service The smart alarm supports the subscription-based professional 247 monitoring service from the X-Sense Home Security app, giving you access to an emergency dispatch when you need it most to protect your life, family, and property. 10-Year Sensor Life This battery-operated smart electrochemical carbon monoxide detector has a stable and high-performance electrochemical Figaro CO sensor that accurately monitors CO levels in the house, ensuring that your family stays protected for 10 years. CO Alarm Precaution Using the app, you will quickly receive a warning that alerts you to any possible risk once the CO level reaches above 100 ppm without waiting for the response time, allowing you to act immediately. Free-Standing Design Measuring a mere size of 5.3 2.5 0.6 in 135 63 24 mm, this smart carbon monoxide detector can be left free-standing on a shelf or fixed to a wall using the accessories provided, giving you peace of mind whether at home or on holiday.

Never Miss an Alarm Whenever smoke is detected, youll get an immediate alert on your phone at the same time, the base station and each linked alarm will sound loudly, letting everyone at home know to evacuate. Build a Smart Home Safety System The SBS50 base station supports up to 50 devices including the XS01-M smoke alarm, XC01-M carbon monoxide alarm, XP0A-MR combination alarm, STH51 thermo-hygrometer, SWS51 water leak sensor and more the 1,640 ft 500 m open-air connection range means you can even secure every corner. Instant Status Alerts Monitor your home from anywhere and receive instant notifications for alarms, low battery warnings, faults, and more via the X-Sense Home Security app you'll also get a notification when the danger has passed. Control with One Button Easily connect the base station to your Wi-Fi with one button, and quickly silence your entire system by tapping the silence button in the app or on the base station. Test from the App Enjoy instant and easy peace of mind by testing the alarm from within the app, without having to climb a ladder to press a button on the device itself. Fast Fire Dispatch Within Just 3 Seconds As a subscriber to the Protect Premium which provides 247 professional monitoring service, when an alarm is triggered, you will receive a message from the monitoring center within 3 seconds to verify the emergency. After the emergency is verified, a fire truck will be dispatched immediately. Share the Convenience The handy Family Sharing feature allows up to 12 family members to control the device using the X-Sense app receive push notifications, testsilence devices, check the alarm status and more. Full Kit Provided 1 SBS50 base station, 5 XS01-M smoke alarms, 1 power adapter, and 1 power cable included simply download the X-Sense Home Security app and add the devices via a 2.4 GHz Wi-Fi network incompatible with 5 GHz to start protecting your home the smart way.

Talking Alarm Immediately understand the danger thanks to a voice alert that sounds in conjunction with the siren the built-in speaker delivers warnings specific to the detected danger type, such as Warning Smoke detected. Evacuate. or Warning Carbon monoxide detected. Move to fresh air.. 2-in-1 Protection Get full protection from a single alarmthe photoelectric and electrochemical CO sensors which work independently to instantly warn you of dangerous smoke or CO levels keeps your family protected against 2 deadly threats with less hassle peak CO concentration memory is supported and can be reset to 0. 10-Year Lifespan Heat-resistant PC material and 10-year sensor life offer reliable performance for up to 10 years the replaceable CR123A battery lasts up to 5 years. Handy voice alerts keep you easily and quickly informed of important information such as emergencies, battery status, faults and lifespan understand whats going on without digging out the manual so you can take action quicker and keep your family safer. Sleek Design Only 1.2 in 30 mm thick, this ultra-thin alarm blends in anywhere the 5.3 in 135 mm diameter mounting bracket perfectly covers the hole left by your old alarm. Quick to Install Quickly and easily install this smoke and carbon monoxide alarm on any wall or ceiling with the provided mounting kit.

Note The alarm is directly connected to the app via Wi-Fi and does not require SBS50 base station. Cost-Free Real-Time Notifications Keep an eye on your home from anywhere and get immediate push notifications through the X-Sense Home Security app for alarms, low battery, faults, and more. Direct 2.4 GHz Wi-Fi Connection The battery-powered smoke and carbon monoxide alarm connects directly to the X-Sense Home Security app via the 2.4 GHz Wi-Fi network, no base station required. Decade-Long Safety with Precision Detection This 2-in-1 alarm combines photoelectric smoke and Figaro electrochemical CO sensors, ensuring fast and accurate detection and a 10-year lifespan, giving you the utmost safety and peace of mind. Device Sharing With the X-Sense Home Security app, you can effortlessly share your devices with 12 family and friends, enabling them to monitor your home safety and receive crucial alerts. Fast Fire Dispatch Within Just 3 Seconds As a subscriber to the Protect Premium which provides 247 professional monitoring service, when an alarm is triggered, you will receive a message from the monitoring center within 3 seconds to verify the emergency. After the emergency is verified, a fire truck will be dispatched immediately.

Push Notifications Alerts in APP are FREE, SMS Or Email Notifications MAY BE PAID JUST PLUG the Natural GAS detector combo and get on with your day.. CONNECT plug in wall propane gas alarm to Tuya mobile APP through 2.4 GHz WiFi. Our product Gas Detection Treshold is 6LEL - 3LEL thus its at maximum 9 of the 5 by gas volume 100LEL. That threshold allowes for unprecedented safety for you and your family.. The Lower Explosive Limit LEL varies from gas to gas, but for most flammable gases it is less than 5 by volume 100 LEL. The lp Gas Detector - propane detector for monitoring LPG, Methane, Natural gas, and Coal gas.. AUDIBLE SIGNAL. When a gas leak exceeds the standard, LED lights will flash and sound a loud alarm.. NO DRILLING. No unsightly cords or cables. Our stylish rv propane gas detector for home is wireless.. CONTROL with a phone. The Natural gas detector is suitable for 24 hours gas leak monitoring.. The Natural Gas leak detectors are not compatible with 5 GHz network channels. Only 2.4 GHz Wi-Fi.. REAL-TIME Detection with our smart propane detector for camper - rv propane alarm.. Air Quality Monitor indoor is easy to install and can be installed anywhere. Make you feel safer.. Air Quality Tester is designed to seamlessly complement your home style without being an eyesore..

Easy to install CO and explosive gas alarm with three convenient mounting options including AC wall outlet, plugin six foot power cord, or table top. Carbon Monoxide CO alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps. Displays CO concentration. Gas alarms one second of alarm on, one second of alarm off, repeating with GAS shown in display. Loud pulsing alarm that will sound to alert you to a potential problem. Low battery warning feature indicates when the battery needs replacement. UL Certified, 5-year Limited Warranty. Two alarms in one detects carbon monoxide and explosive gas. Three convenient mounting options. Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset. Battery backup 9 volt battery included. Kiddes carbon monoxide alarms meet the requirements of Underwriters Laboratories UL, an independent facility that tests products for compliance with widely-accepted safety standards.

Industry First 2-in-1 Detection - Carbon monoxide detector Indoor Air Quality Monitor combo alerts you to both CO indoor air quality hazards, in a single device. Voice Alarm sounds with 85-decibel alarm and announces the hazard type Warning Carbon Monoxide when a CO hazard is detected, or Replace Alarm when the unit has come to the end of its life span. Easy Installation download the Kidde app, scan the QR code on the back of the CO alarm, plug into a standard outlet. Compatible with Amazon Alexa, Google Home, iPhone, Android smart devices. Indoor Air Quality Monitoring monitors harmful chemicals known as Total Volatile Organic Compounds TVOCs that come from cleaning products paint, also monitors humidity mold risk. WiFi enabled technology allows notifications to be sent to your smartphone as well as friends family in the event of a CO hazard in your home. Electrochemical sensor technology detects poisonous carbon monoxide gas inside your home.

Detect Multiple Gases- Home gas detector suitable for detecting LPGPropane and Methane, natural gas, coal gas, gas fuel, artificial gas, liquefied petroleum gas, liquefied natural gas etc.. Easy to Install - Gas leak detector adopts easy-to-install design, can be used by plugging directly into the power socket to detect leaked gas.. LED Digital Display Sound Warning- Gas Detector offers Voice Notification and a digital readout of the GAS concentration.When gas leak concentration reaches presetting level, the alarm provides a visual and audible signal. 85dB alarm sound, reduce the risk of gas explosion and protect your family's life and property safety.. Testing Process - When Plugged in, it will play a welcome voice and then goes to the warm-up process. usually take 3 minutes and the blue LED blinks once per second. During this process, you can press the touch key, and the product will play different voices and alarm. Widely Applied- This product can be used as independent family alarm equipment, and also can be used as front detector of alarm system. Widely Used for Restaurant, Hospital,Hotel, Oil Factory,Garage, Gas Station etc..

Propane Methane Detector The Chtoocy natural gas detector can monitor a variety of combustible gases methane, propane, butane, ethane exists in LNG and LPG. It is widely used in homes, kitchens, garages, travel trailers, RVs, campers, food trucks, restaurants, hotels, and so on. This gas detector can decrease the risk of harm resulting from gas leaks, protecting you and your family.. Install Easily with Power Cord Included a power cord which will allow you to install this natural gas sensor at the ideal location in your house for nice gas detection. Different gases require different installation positions methane or natural gas should be about 12-20 inches from the ceiling propane or butane should be about 12-20 inches from the floor. For more details, you can check the USER MANUAL on this product page.. Sound Alarm at 85 dB The natural gas leak detector will sound alarm with an 85dB siren to remind you when the gas concentration in the air reaches 8 LEL. It will continue to alarm until the LEL drops to 0 or you click the TEST button to silence it.. Digital Display Accuracy With a clear LCD display screen, it is easy to read, and real-time gas levels let you know the exact gas concentration in the air of your home at all times. This simple and elegant natural gas alarm will replenish the style of your home or camper without impact your interior design.. 100 Satisfaction 1-year warranty and lifetime service are offered on Chtoocy smart natural gas detector. If you need any help, please feel free to contact us we provide quick responses and friendly customer service..

Detection range Approximately 50 to 10,000 ppm based on Methane. Two levels of sensitivity High approximately 50 to 1000 ppm and Low approximately 1000 to 10,000 ppm. Five red LED's visual and 85dB audible alerts that increase with gas concentration. Automatic zero-point calibration at power-up lights will flash during self-calibration this does not indicate the presence of gas. 18-Inch flexible gooseneck expands sensor's reach clips onto meter for storage. Over-molded body for comfortable grip. Auto power-off after 10 minutes of non-usage conserves battery life.

Visual Audio Gas Alarm When the natural gas or combustible gas concentration leaks reach a 73LEL, this gas detection alarm will sound an 85dB alarm and display the dangerous gas concentration level, Gas detected alarm voice Attention please, gas leaking. Gas detected alarm voice Attention please, gas leaking. Carbon monoxide detected alarm voice Attention please, carbon monoxide gas leaking, please open the window and the door.. Powerful Quality Functionality Natural gas detector adopting high-quality semiconductor calefaction type sensor. More accurate response times to gas exposure, avoiding the possibility of false alarms. LCD display of combustible gas concentration, plug and play, the LED display concentration changes, and an alarm of 85 dB or more issues. Protect your family and leave you worry-free.. Detect Various Flammable Gases Gas detectors for home natural gas and carbon monoxide, Suitable for detecting methane, natural gas, propane, butane, ethane, coal gas, gas oil, gasoline, toluene, sewer gas, alcohol, ketones, and other flammable gases. It is widely used in homes, kitchens, garages, travel trailers, campers, food trucks, restaurants, hotels, and so on. This gas leak detector can decrease the risk of harm resulting from gas leaks, protecting you and your family.. Easy to Use Easy to install CO and explosive gas alarm, which can be used by plugging directly into the power socket to detect leaked gas. The system warm-up time is about 3 minutes. During this time period, the gas test will not work. You need to wait for the display to show 0 the system enters the working state before it can be tested normally. The gas detector does not include batteries and needs to be purchased separately for use in the event of a power outage or socket failure at home.. Make Safety a Top Priority Unchecked propane gas leaking into your sleep space can leave you sick or worse. This gas leak detector for home lets you know the moment there is a problem, so you'll know when it's time to react and fix a problem. Be worry free and know you did everything to keep your family safe from fires or explosions caused by dangerous gas leaks from your stove, furnace, water heater, washing machine, fireplace, kitchen, garage, or grill..

Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home. Split Spectrum Sensor looks for both fast burning and smoldering, and tells you where the danger is. Get phone alerts so you know something's wrong even when you're away from home1. CO detector looks out for carbon monoxide and tells you where it's located. With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke. No chirps to tell you the battery is low Nest Protect tests its own batteries and gives you a Nightly Promise when you turn off the lights so you know everything is working. A Light in the Dark Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way.. The Nest smoke and carbon monoxide alarm has sensors with a 10-year lifespan to help keep your family safe for up to a decade. With Safety Check you can test all your smoke and CO alarms with just a tap and get a full report once the test is done. Know from anywhere. Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low.. Tells you what and where. It speaks up to tell you if theres smoke or CO and where the problem is, so you know what to do. Connectivity Bluetooth 4.0 LE, Wi-Fi 4 802.11n. App Silence. Nest Protect is the first alarm you can hush from your phone. Simply walk to the Nest Protect that noticed the problem and open the Nest app.. Split-Spectrum Sensor. In an emergency, seconds count. Nest Protect uses two wavelengths of light to look for both fast and slow burning fires.. Heads-Up. Get a friendly voice alert so you can handle burning toast before it becomes a burning toaster.. 10-year carbon monoxide sensor. Carbon monoxide is odorless, invisible and deadly. When theres CO, Nest Protect tells you where its hiding..

The carbon monoxide detector alarm continuous monitoring of Carbon Monoxide levels to keep your family safe. Operated by 2 1.5V AAA batteries not included,portable and easy installation,no need for socket, not affected by power failure, can be installed anywhere. Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.To ensure complete protection make sure to place one on each level of your home and in each bedroom.. Simple to use,with a single testreset button,when a dangerous level of carbon monoxide is detected the red LED will flashes and a loud alarm pattern will sound--Loud 85 decibel alarm with LED Flash.. Alarm standard 50ppm, alert within 60 to 90 minutes 100ppm, alert within 10 to 40 minutes 300ppm, alert within 3 minutes. Note When you test the detector, please do not use gas blow the hole directly.. All CO alarms are rigorously tested to meet UL standards.We promise and guarantee the customer service by providing a response to any questions, concerns, and inquiries within 24 hours..