Top 6 Best Detector De Gas
of November 2024
1
Best Choice
TOPTES
TOPTES
Natural Gas Detector, TopTes PT299 Gas Leak Detector with Extendable Rod, Portable Gas Sniffer for Detecting Combustible Gas Leaks Like Methane & Propane in Home/RV (includes Battery x2) - Orange
10
Exceptional
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2
Best Value
TOPTES
TOPTES
Natural Gas Detector, TopTes PT177 Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Gas Leak Sources Like Methane,Propane for Home (Includes Battery x2)-Orange
9.9
Exceptional
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3
TOPTES
TOPTES
TopTes PT210S Gas Leak Detector, Natural Gas Detector with 4-inch Probe, Propane Leak Detector Locating Combustible Gases Like Natural Gas, Methane for Home, Measures%LEL (Incl. Batteries) - Orange
9.8
Exceptional
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4
TOPTES
TOPTES
Gas Leak Detector, TopTes PT330 Natural Gas Detector with Audible & Visual Alarm to Locate Combustible Gas Leaks Like Natural Gas, Propane for home and RV (includes Battery x3) - Orange
9.7
Exceptional
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5
GasDoc
GasDoc
RV Propane Gas Detector, GasDoc Propane/LP Gas Alarm with 85dB Audible & Visual Alarm, for Natural Gas or Propane in RV or Motorhome, DC 12V, 3 Brackets (Long & Short, Surface & Flush) - White
9.6
Exceptional
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6
TOPTES
TOPTES
TopTes PT520A+ Rechargeable Gas Leak Detector, Natural Gas Detector with 17-inch Probe, Checking Combustible Gas Leaks Like Natural Gas, Propane, Methane, Butane for Home, HVAC and RV - Orange
9.5
Excellent
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7
TOPTES
TOPTES
TopTes PT210 Gas Leak Detector, Natural Gas Detector with Audible & Visual Alarm, Locating The Source of Propane, Methane, and Combustible Gas Leaks for Home and RV (includes Battery x2) - Orange
9.4
Excellent
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8
Kidde
Kidde
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
9.3
Excellent
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9
TOPTES
TOPTES
Natural Gas Detector, TopTes PT520A Gas Leak Detector with 17-Inch Gooseneck, Locating The Source of Propane, Natural Gas, and Combustible Gas Leak for Home and RV (Includes Battery x3) - Orange
9.2
Excellent
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10
HSTMYFS
HSTMYFS
Natural Gas Detector, Propane Detectors for Home,Natural Gas Propane Leak Alarm for Home Kitchen, High Sensitivity Natural Gas Propane Leak Detection (Light White)
9.1
Excellent
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11
SRXES
SRXES
Natural Digital Gas Detector, Natural Gas Detector, High Sensitivity LPG LNG Coal Natural Gas Leak Detector, Gas Leak Detector, Kitchen Gas Leak Dector(1)
9.0
Excellent
View on Amazon
12
TOPTES
TOPTES
TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange
8.9
Very Good
View on Amazon
13
Beautygrowing
Beautygrowing
Natural Gas Detector, Gas Leak Detector, Household Propane Leak Detector for Home Kitchen (1, White)
8.8
Very Good
View on Amazon
14
UEi Test Instruments
UEi Test Instruments
UEi Test Instruments CD100A Combustible Gas Leak Detector
8.7
Very Good
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15
FORENSICS DETECTORS FD
FORENSICS DETECTORS FD
Gas Leak Detector by Forensics | Combustibles | 2021 Design | 10ft Drop Test | Natural Gas, Methane & Combustibles | RED Color |
8.6
Very Good
View on Amazon
16
Google
Google
Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated , White - S3000BWES
8.5
Good
View on Amazon
17
BW Technologies
BW Technologies
BW Technologies XT-XWHM-Y-NA GasAlertMax XT II 4-Gas Detector with Pump, Combustible, O2, H2S and CO, Yellow
8.4
Good
View on Amazon
About Detector De Gas
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Natural Gas Detector, TopTes PT299 Gas Leak Detector with Extendable Rod, Portable Gas Sniffer for Detecting Combustible Gas Leaks Like Methane & Propane in Home/RV (includes Battery x2) - Orange
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.
Natural Gas Detector, TopTes PT177 Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Gas Leak Sources Like Methane,Propane for Home (Includes Battery x2)-Orange
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.
TopTes PT210S Gas Leak Detector, Natural Gas Detector with 4-inch Probe, Propane Leak Detector Locating Combustible Gases Like Natural Gas, Methane for Home, Measures%LEL (Incl. Batteries) - Orange
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.
Gas Leak Detector, TopTes PT330 Natural Gas Detector with Audible & Visual Alarm to Locate Combustible Gas Leaks Like Natural Gas, Propane for home and RV (includes Battery x3) - Orange
Handy Combustible Gas Leak DetectorTopTes PT330 gas detector helps you to accurately detect and locate combustible gas leaks like LPG, LNG, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, etc. Note Please allow 30 seconds of warm-up time before the operation. Easy to Read, Big LCD ScreenTopTes PT330 adopts user-friendly 2.26inch LCD tricolor screen, where you could easily get the readings. You could exactly pinpoint gas leaks in gas stove, gas dryer, gas water heater, gas oven, camping cooker, or gas tank. It could reduce the risk of gas explosion and keep your family and property safe. Detection range 50 to 10,000 ppm based on Methane. Quick Response, Visual Audible AlarmWith an excellent semiconductor, TopTes PT330 could react with the leaks within 0.5 to 3 seconds. Three-color backlight screen displays the current gas concentration, green to low, orange to medium, and red to high. The leaks could be easily pinpointed since the bar graphs and beep sounds will increase as the gas concentration increases. User-Friendly Energy-saving With Auto Power-Off button, you could switch off or on auto power-off function. When enabled, PT330 gas leak detector will turn off after 10 mins of inactivity for saving energy. Moreover, the warning audible alarm could be turn off via the Mute button. Besides, high-precision temperate and humidity sensors are added for further measuring the gas leaks under different conditions. What You Get 1x PT330 Gas Leak Detector, 1x Storage Bag, 3x AAA Batteries, 1x User Manual. Combined with Amazon's excellent delivery service, a 36-Month after-sale service and lifetime technical support would be provided. Feel free to contact us if you have any questions or concerns.
RV Propane Gas Detector, GasDoc Propane/LP Gas Alarm with 85dB Audible & Visual Alarm, for Natural Gas or Propane in RV or Motorhome, DC 12V, 3 Brackets (Long & Short, Surface & Flush) - White
TopTes PT520A+ Rechargeable Gas Leak Detector, Natural Gas Detector with 17-inch Probe, Checking Combustible Gas Leaks Like Natural Gas, Propane, Methane, Butane for Home, HVAC and RV - Orange
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.
TopTes PT210 Gas Leak Detector, Natural Gas Detector with Audible & Visual Alarm, Locating The Source of Propane, Methane, and Combustible Gas Leaks for Home and RV (includes Battery x2) - Orange
High Low sensitivity ModeThe TopTes PT210 gas leak detector has dual mode detection high sensitivity and low sensitivity. After a warm-up time of 30-45 seconds, the gas detector enters a high sensitivity mode range 50 to 500 ppm, which can quickly identify the source of gas leaks in just 0.5 seconds. Detects combustible gases such as propane, methane, natural gas, coal gas, gasoline, LPG, LNG, etc.. Portable Design Broad application This pen-style gas detector design can be carried easily in your pocket and used in a wide variety of environments to track a gas leak from a kitchen gas stove, water heater, natural gas heating system, RV propane tanks, factory gas pipelines, and other similar applications. It can save you hundreds in diagnostic fees from technicians. Visual Audible Alarm This gas sniffer will provide visual and audible alarms if any combustible gas is detected. There is a continuous alarm at a tone of 75 dB and the LCD light turns red. The LCD display with a green backlight ensures clear visibility even in dim light conditions. Battery Powered Easy Operation The PT210 natural gas leak detector comes with 2x AAA batteries, making it very easy to set up and get ready for detection. It has 3 function buttons High Sensitivity Mode, Low Sensitivity Mode, and Power and a backlit LCD screen with a low-battery indicator. Automatic shutdown after 10 minutes of non-use helps save energy. What You Get 1x PT210 Gas Leak Detector, 1x Storage Bag, 2x 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.
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
CO detector with digital display alert modes 85 decibel alarm alerts of fire. Electrochemical sensor technology - detects carbon monoxide other forms of combustible gas such as propane natural gas. Easy to install - combo smoke and gas alarm is powered by a 120VAC wall outlet with 9V battery backup. Low battery warning feature indicates when the battery needs replacement. 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.
Natural Gas Detector, TopTes PT520A Gas Leak Detector with 17-Inch Gooseneck, Locating The Source of Propane, Natural Gas, and Combustible Gas Leak for Home and RV (Includes Battery x3) - Orange
Effective Gas Leak DetectorTOPTES PT520A natural gas detector can accurately help you locate the gas leakage of various combustible gases in tight spaces, such as methane, natural gas, propane, LPG, gasoline, etc. Note Please allow 30 seconds of warm-up time before the operation. Flexible Probe Easy to UseWith a 17-inch flexible gooseneck bendable in any direction, the portable gas leak detector makes it easy for you to access hard-to-reach areas, such as natural gas pipelines, propane storage tanks, gas fireplaces, sewers, basement, RV, and other narrow space. It can be carried anywhere to find leaks no matter outdoors or indoors. Visual Audible Alarm PT520A will rapidly respond in 0.5 seconds while gas is detected. Seven colored analog bars and a 75dB audible buzzer help you point out the gas leak location. Both of them increase with combustible gas concentration. Detection range 50 to 10,000 ppm based on Methane. User-Friendly Functions Activate or cancel the Auto Power-Off function through the APO button just in your need. When canceled, the detector will turn off after 10 minutes of inactivity to save power. In addition, you can turn off the audible alarm at any time via the Mute button to eliminate annoying alarm noise. The double-sided bar-shaped groove design and non-slip material make it wear-resistant and easy to hold. What You Get1PT520A Gas Leak Detector, 3AAA Batteries, 1Protective Case, and 1User Manual. 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.
Natural Gas Detector, Propane Detectors for Home,Natural Gas Propane Leak Alarm for Home Kitchen, High Sensitivity Natural Gas Propane Leak Detection (Light White)
Home gas detector suitable for detecting LPGMethane, natural gas, coal gas, gas fuel, artificial gas, liquefied petroleum gas, liquefied natural gas etc.. 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.. Gas leak detector adopts Easy-to-install Design, can be used by plugging directly into the power socket to detect leaked gas.. 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.. The system warm-up time is about 2-3 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.Gas leak detector adopts Easy-to-install Design, can be used by plugging directly into the power socket to detect leaked gas..
Natural Digital Gas Detector, Natural Gas Detector, High Sensitivity LPG LNG Coal Natural Gas Leak Detector, Gas Leak Detector, Kitchen Gas Leak Dector(1)
Monitoring of multiple gasesNatural gas detector suitable for detecting the natural gas, LPG gas and coal gas.. Widely used Kitchen gas leak detector is very stable, home gas detector widely used for restaurant, oil factory, hotel, garage, gas station, home, kitchen, etc.. Simple installationHome gas detector is designed for easy installation and can be directly plugged into a power outlet to detect leaking gas. Powerful Quality Functionality When a gas alarm detects a leak of combustible gas.When gas leakage concentrations reach preset levels, alerts provide visual and auditory signals to reduce the risk. Warm prompt The natural digital gas detector needs a pre-heating process. After connecting the gas alarm to the power supply, wait for about 3 minutes for gas detection.
TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange
Combustible Gas Leak Detector The 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 and Audio Gas Alarm The 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 and Easy to Use The 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 Design Pocket-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 Get 1x PT199 Gas Leak Detector, 1x Storage Bag, 2x AAA Batteries, 1x User Manual.
Natural Gas Detector, Gas Leak Detector, Household Propane Leak Detector for Home Kitchen (1, White)
Natural Gas DetectorGas leak detectors for home use make your environment safer.. Gas Leak DetectorAdopt high-precision sensor technology to accurately monitor leaked gas.. LED Digital Display Sound WarningGas 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.. Easy to InstallGas leak detector adopts Easy-to-install Design, can be used by plugging directly into the power socket to detect leaked gas.. PrecautionsThe system warm-up time is about 2-3 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.Gas leak detector adopts Easy-to-install Design, can be used by plugging directly into the power socket to detect leaked gas..
UEi Test Instruments CD100A Combustible Gas Leak Detector
Comprehensive Gas Detection This handheld gas detector is capable of detecting acetone, ammonia, butane, methane, natural gas, LPG, Jet fuel. Great detector for any residential or commercial HVAC needs.. Easy to Use Simply turn on the gas leak detector, let it warm up for 10 seconds in open air, and then point gooseneck toward suspected areas. When a leak is found the leak detector will provide both audio and visual cues through increasing tic rate. This Gas leak detector is great for any homeowner or HVAC contractor and is great for both industrial and residential environments. Effective in Tight Spaces This gas sniffer features a long 18 flexible gooseneck to access hard to reach places. Also includes a tip light at the end of gooseneck to illuminate leak in a dark environment. Efficient This combustion gas leak detector will save time while assessing equipment. It is faster and more effective than the traditional soap method..
Gas Leak Detector by Forensics | Combustibles | 2021 Design | 10ft Drop Test | Natural Gas, Methane & Combustibles | RED Color |
ACCURATE Made in Japan sensor. Methane Calibrated.. SHOCK ABS housing can take a 10ft drop.. DISPLAY Large color LCD screen with temperature.. USES For inspectors, technicians, engineers.. TRUST 1 year limited warranty 7 year sensor life .
Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated , White - S3000BWES
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..
BW Technologies XT-XWHM-Y-NA GasAlertMax XT II 4-Gas Detector with Pump, Combustible, O2, H2S and CO, Yellow
Four-gas detector for surveying levels of H2S, oxygen O2, carbon monoxide CO, and combustibles in natural and industrial environments, and in other personal safety, training, research, and ambient air monitoring applications. Electrochemical cell sensor measures H2S and carbon monoxide levels in ppm, capillary-pore fuel cell measures oxygen in percent by volume, and catalytic bead combustible sensor measures explosive gases in percent LEL. Audio, visual, and vibration alarms alert simultaneously when ambient H2S, oxygen, carbon monoxide, and combustible gases reach preset low, high, TWA, or STEL levels. LCD screen shows up to four ambient gas concentrations, battery level, alarm condition, and the status of calibration, bump, and sensor self-tests. Integrated diaphragm pump allows for localized sampling of the atmosphere for more precise readings than those generated through diffusion.