First alert green light - When it comes to weather emergencies, staying informed is crucial for your safety and well-being. One of the most effective ways to receive timely and accurate information about se...

 
The First Alert SC7010BV is a smoke and carbon monoxide alarm that is not categorized. Designed to detect both fire and the presence of dangerous carbon monoxide gas, this alarm provides essential protection for residential or commercial spaces. With its dual sensor technology, the SC7010BV is capable of detecting both smoldering fires and fast .... Real jeffrey dahmer pictures

What do First Alert smoke or CO alarms sound like? Learn More > Register your product. Request a combination or key. First Alert Consumer Support. Hours of Operation: Mon …View and Download First Alert 7010 user manual online. AC Powered Photoelectric Smoke Alarm with Battery Back-Up and Silence Feature. 7010 smoke alarm pdf manual download. Also for: 4120 series, 7010b. ... Ac powered slim line smoke & strobe light combo alarm with sealed lithium battery backup (2 pages) First Alert 7020BSL - Slim …Are you an employee? Login here. LoadingPulsing yellow light ring. Heads-Up: There's smoke • (room name). Smoke levels are rising. Put out the source of the smoke. Then, use the app or press the center button to silence the alert. "Heads-Up. There's carbon monoxide in the (room name). The alarm may sound." Listen to it now: Pulsing yellow light ringAre you tired of endlessly searching for job opportunities? Do you want to stay updated on the latest job openings without spending a dime? Look no further. In this ultimate guide,... Always discharge the branch circuit before servicing an AC or AC/DC Smoke Alarm. First, turn off the AC power at the circuit breaker or fuse box. Next, remove the battery from Smoke Alarms with battery back-up. Finally, press and hold the test button for 5-10 seconds to discharge the branch circuit. Step 1: Turn off the Power: The first step in resetting a smoke detector is to turn off the power to the device. This ensures your safety during the process and prevents any potential electrical hazards. To turn off the power, locate the circuit breaker panel in your home. This panel is usually found in the basement, garage, or utility room.intermittent green---SA340. intermittent red--red every 10 secs. SC7010B. Green on. Green blinks on/off. red flashes every 5 secs. red every 10 secs. SC9120B. Green on. Green rapid flashes. red flashes every 5 secs. red … the power first may result in serious electrical shock, injury or death. • This unit will not alert hearing impaired residents. It is recommended that you install special units which use devices like flashing strobe lights to alert hearing impaired residents. • Installation of this unit must conform to the electrical codes in your area; In today’s world, where weather patterns are becoming increasingly unpredictable, it is crucial to stay informed and prepared for any potential emergencies. One of the most effecti...First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation: Mon - Fri (9am - 8pm CT) Sat - Sun (9am - 5:30pm CT) 1-833-ONE-LINK (663-5465) IMPORTANT LINKS. First Alert Home. First Alert Store.This type of chirp means that smoke has been detected in your home. You and your family need to evacuate and call 9-1-1 once safely outside. Low Battery or End-of-Life: This type of chirp indicates it is time to replace your smoke alarm's batteries or the smoke alarm itself. Refer to your smoke alarm's user manual for the specific beeps based ...3. Insert the screws provided until head is approx. 1/8 inch (3 mm) from wall (if mounting in plaster board or drywall, drill 3/16 inch (5. mm) hole and use plastic anchor provided). 4. Hook the Alarm over the screw onto the keyhole in …Designed to help promote household safety, the First Alert 9120B Hardwired Smoke Alarm with Battery Backup can provide a vital early warning for fires. This ...First Alert P1200 User Manual View and Read online. Est. reading time 23 minutes. ... Dual Power indicator light and alarm indicator: Green LED provides visual indication of an alarm memory condition; ... After you install the battery, the power indicator light may flash. (If the unit alarms, the light will blink rapidly, and the horn will ...Dashboard warning light symbols can be a source of confusion and anxiety for many drivers. These small but important indicators are designed to alert us to potential issues with ou...AC and AC/DC units will have a power indicator light (red or green) that shines continuously when they are receiving electrical power. If you have a 10-Year model, the smoke alarm may not have been properly activated. ... First Alert Wireless Interconnect Smoke Alarms remove the limitations of a standard smoke detector by being able to link ...First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation: Mon - Fri (9am - 8pm CT) Sat - Sun (9am - 5:30pm CT) 1-833-ONE-LINK (663-5465) IMPORTANT LINKS. First Alert Home. First Alert Store.Similar to Latching Alarm feature, a light will be blinking on the alarm with a low battery. ... 9120 Series: Green: 2 seconds on, 2 seconds off: 7010 Series: Red: Blinks 3 times every 45 seconds ... SC7010 Series: Red: 2 seconds on, 2 seconds off: Heat Alarm: HD6135B: Red: Blinks on and off every 5 seconds: Related Articles. First Alert ...First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation:Green power indicator light will shine continuously. 7. If the Green power indicator light does not light, TURN OFF POWER TO THE JUNCTION BOX and recheck all connections. If all connections are correct and the Green power indicator still does not light when you restore the power, the unit should be replaced immediately. 8.Apr 14, 2023 · The red light should stop blinking, and you should hear a loud, continuous alarm sound. 2. Faulty detector. If the red light on the First Alert smoke detector is blinking rapidly (about 4 times per second), it may be due to a malfunction or damage to the device. In this case, you should replace the detector. On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3 feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/CO Alarms may be required depending on the length, angle, etc. of the ceiling's slope. Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.Summary of Contents for First Alert 3120B. Page 1 • Installation of this unit must conform to the electrical codes in If you are interconnecting more than one Smoke Alarm, you MUST read Key Features of the 3120B Photo & Ion Combo Smoke Alarm: retail purchase and is not transferable. Keep the original sales receipt. the power first may result in serious electrical shock, injury or death. • This unit will not alert hearing impaired residents. It is recommended that you install special units which use devices like flashing strobe lights to alert hearing impaired residents. • Installation of this unit must conform to the electrical codes in your area; The First Alert Smoke Alarm 9120b is designed to provide early warning of smoke and fire in the home. As a result, it is equipped with a variety of features, including a green light that blinks every time the device is activated. When this light blinks, it could mean a few different things, and it’s important to understand how to respond in ... First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation: Depending on what. mode the alarm is in, pushing the button pr. ovides different functions such. as testing the alarm, silencing the alarm, re-testing the alarm when in. silence and clearing the Latching feature. Latching Alarm Indicator easily identifies initiating alarm even after the. alarm condition has subsided.Your AC power may not be on. AC and AC/DC units will have a power indicator light (red or green) that shines when they are receiving electrical power. If you have a 10-year model, the smoke alarm may not have been properly activated.press the red reset button. The green light will blink continuously. 3 Reenter your new passcode and press the red reset button. 4 If both entries match, the green light will turn on for 2 seconds and a new passcode is set for operation. 5 If both entries do not match, the red light will turn on for 2 seconds and revertBattery back-up (Model 7010B only): Keeps alarm functioning during a. power interruption provided battery is fresh and installed properly. AC Powered Photoelectric Smoke Alarm. with Battery Back-Up and Silence Feature. Model 7010B. ~. Input: 120V AC. , 60Hz, 0.04A. AC Powered Photoelectric Smoke.Why is there a green/red light on my First Alert alarm? What does it mean? This is the power indicator light: First Alert and BRK alarms have a power indicator light to show … Always discharge the branch circuit before servicing an AC or AC/DC Smoke Alarm. First, turn off the AC power at the circuit breaker or fuse box. Next, remove the battery from Smoke Alarms with battery back-up. Finally, press and hold the test button for 5-10 seconds to discharge the branch circuit. Download the user manual for your First Alert product and learn how to install, operate, and troubleshoot it.the test button. The Green power LED will start to blink indicating the ONELINK® Alarm is waiting for program data from one of the other setup ONELINK® Alarms. 4. Press and hold the test button on the first Alarm, until the second Alarm chirps and its Green power LED stops blinking. Then release the test button. 5.Use Siri. iPhone or iPad users can ask Siri to adjust the nightlight. Here are the prompts you can use. Hey Siri, turn on [room name] nightlight. Hey Siri, turn off [room name] nightlight. Hey Siri, set brightness of [room name] nightlight to [percentage]. Hey Siri, dim [room name] nightlight to [percentage].intermittent green---SA340. intermittent red--red every 10 secs. SC7010B. Green on. Green blinks on/off. red flashes every 5 secs. red every 10 secs. SC9120B. Green on. Green rapid flashes. red flashes every 5 secs. red every sec. SCO5. intermittent red --Flashes red. SCO500. Green flash 1x per min. Green blinks on/off-Flashes red. SCO5CN ...Summary of Contents for First Alert 3120B. Page 1 • Installation of this unit must conform to the electrical codes in If you are interconnecting more than one Smoke Alarm, you MUST read Key Features of the 3120B Photo & Ion Combo Smoke Alarm: retail purchase and is not transferable. Keep the original sales receipt.press the red reset button. The green light will blink continuously. 3 Reenter your new passcode and press the red reset button. 4 If both entries match, the green light will turn on for 2 seconds and a new passcode is set for operation. 5 If both entries do not match, the red light will turn on for 2 seconds and revertLED Light Indicators on First Alert Alarms. ... Red or Green Light on Alarm. Number of Views 446.25K. Stop False Alarms or Beeps on the P1210, PC1210, P1200, or ...First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation:First Alert P1210 User Manual View and Read online. Est. reading time 23 minutes. ... Local Alarm Memory: Green LED flashes 3 times every 43 seconds for 24 hours. After 24 hours the unit will chirp rapidly while the Test button is pressed. ... Dual Power indicator light and Alarm indicator: Green LED provides visual indication of an Alarm ...It is important to know the difference between the beeps or chirps. Refer to your alarm's user manual for your specific model. 4 beeps and a pause: This means that there is carbon monoxide in the air and you should seek fresh air immediately and call 9-1-1. 1 beep every minute: This means that the detector has low batteries and you should ...First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation:Green: 2 seconds on, 2 seconds off: 7010 Series: Red: Blinks 3 times every 45 seconds: 3120B: Red: 2 seconds on, 2 seconds off: 7010BSL: Red: ... LED Light Indicators on First Alert Alarms. Number of Views 1.11M. Wireless Interconnect Pairing Instructions. Number of Views 42.82K. Trending Articles.Your new First Alert® Digital Waterproof Fire Safe with Ready-Seal™ will provide years of safe and secure protection for your valuables, important documents and ... Green Light Keypad Backlight Red Light MENT TING: CLASS 350 ˜ 1 HR. NO BG˜123,456 PL˜12345 This will turn the sound on. Repeat the process if you want the sound turned off. 1 ...In today’s competitive job market, staying updated with the latest job openings is crucial for job seekers. One of the significant advantages of utilizing free job alert services i...First Alert P1200 User Manual View and Read online. Est. reading time 23 minutes. ... Dual Power indicator light and alarm indicator: Green LED provides visual indication of an alarm memory condition; ... After you install the battery, the power indicator light may flash. (If the unit alarms, the light will blink rapidly, and the horn will ... When a First Alert smoke or carbon monoxide detector is blinking green yet emitting an intermittent chirping sound, this typically signals that the battery is running low and needs replacement. Most First Alert models include a diagnostic chirp and blinking light pattern to indicate when battery power is getting dangerously low. The First Alert Smoke Alarm 9120b is designed to provide early warning of smoke and fire in the home. As a result, it is equipped with a variety of features, including a green light that blinks every time the device is activated. When this light blinks, it could mean a few different things, and it’s important to understand how to respond in ...When a First Alert smoke or carbon monoxide detector is blinking green yet emitting an intermittent chirping sound, this typically signals that the battery is running low and needs replacement. Most First Alert models include a diagnostic chirp and blinking light pattern to indicate when battery power is getting dangerously low. If your smoke alarm is chirping even though it has a new battery, try these troubleshooting steps to clear out residual charge from the old battery. Remove the alarm from your ceiling or wall. Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge ... All BRK® and First Alert® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion. Smoke particles of varying number and size are produced in all fires. Ionization technology is generally more sensitive than photo-electric technology at detecting small particles, which tend to beServe a slice of this vegetable terrine, from Chef Stéphane Reynaud’s new book, Terrine, with a hunk of crusty bread and some simple salad greens for an elegant spring brunch or a ...First Alert offers a variety of alarms to help ensure your family is protected, including a tabletop alarm with a 10-year sealed battery and digital display. Combination Smoke and Carbon Monoxide Alarms. First Alert also offers combination smoke and carbon monoxide alarms, which provide 2-in-1 protection against both smoke and carbon monoxide.Why is there a green/red light on my First Alert alarm? What does it mean? This is the power indicator light: First Alert and BRK alarms have a power indicator light to show you that your alarm is receiving power. Some alarms have a red or green light that blinks every few minutes, while other models blink rapidly or shine a solid light.Thank you for choosing First Alert® for your Smoke Alarm and hearing impaired strobe light needs. You have purchased a state of the art Smoke and Strobe Light Combo Alarm designed to provide hearing impaired individuals with a visual and audible warning of a fire. When used with additional carbon monoxide or combination smoke & carbon monoxideFirst Alert provides reliable fire safety product including smoke alarms, carbon monoxide detectors and more to ensure your home is safe and protected!When it comes to weather emergencies, staying informed is crucial for your safety and well-being. One of the most effective ways to receive timely and accurate information about se...4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced. 5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. …The 7010BSL First Alert Hardwired Photoelectric Smoke Detector with Battery Backup & Strobe features a photoelectric smoke sensing chamber, an integrated 177 candela strobe light, an 85dB horn and AAA battery back-up. The Strobe Light is designed to provide hearing impaired individuals with a visual warning of a fire.Driving in Ontario can be challenging, especially when unexpected highway closures occur. Whether it’s due to accidents, construction, or severe weather conditions, staying informe...In today’s fast-paced world, staying informed is more important than ever. Whether you’re a news junkie or just want to be in the know, live breaking news alerts can help you stay ...Step 1: Silence your alarm. To silence a nuisance alarm, press and hold the Silence Button on your unit. This will quiet the horn so you can find what caused the alarm. Step 2: Review these possible fixes. Take a moment to review these questions to help uncover the cause of the false alarm and correct any issues.First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home Support. Hours of Operation:Dashboard warning light symbols can be a source of confusion and anxiety for many drivers. These small but important indicators are designed to alert us to potential issues with ou...A. Some signs that a First Alert carbon monoxide detector may not be working include a beeping or chirping sound, a yellow or red light indicator, or if the device is not responding to the test button. These signs may indicate a low battery, end of life, or a malfunction.Please try the following: Check the engraved key number and verify it matches the engraved letter on the key cylinder. Spray WD-40 oil in the lock. Tap it lightly with a hammer. Try the key again. If the key still does not work, please contact our Support Team for more information. My digital keypad won’t work, and I can’t access my safe.intermittent green---SA340. intermittent red--red every 10 secs. SC7010B. Green on. Green blinks on/off. red flashes every 5 secs. red every 10 secs. SC9120B. Green on. Green rapid flashes. red flashes every 5 secs. red every sec. SCO5. intermittent red --Flashes red. SCO500. Green flash 1x per min. Green blinks on/off-Flashes red. SCO5CN ...Download the user manual for your First Alert product and learn how to install, operate, and troubleshoot it.1 Chirp (about 1x per minute): Low-battery chirp. Causes: Low battery. Batteries facing wrong direction. Battery drawer partially open. Battery pull-tab still in place. Solution: Alarms with 9V or AA batteries require fresh batteries at least once per year. Insert a fresh Duracell, Energizer, or Everready battery to stop the chirp.When it comes to emergency situations, timely and accurate weather alerts can mean the difference between life and death. In recent years, advancements in technology and meteorolog...The color indicator on the Safe & Sound unit visually communicates its status to you. Some colors also have a voice notification to let you know what’s happening. Note: This article applies to the Onelink Safe & Sound (model 1039102).Make a mark inside each outline for the drill holes. Put the unit where it won't get covered with dust when you drill the mounting holes. Using a 3/16-inch (5 mm) drill bit, drill a hole through each pencil mark. Insert the plastic screw anchors (in the plastic bag with screws) into the holes.USER'S MANUAL. The Mounting Bracket: AC POWERED SLIM LINE SMOKE. The mounting bracket installs onto the junction box. & STROBE LIGHT COMBO ALARM. It has a variety of screw slots to fit most boxes. WITH SEALED LITHIUM BATTERY BACKUP. The Power Connector: Input: 120V AC ~, 60Hz, 0.8A Alarm.One of the biggest reasons senior citizens end up in the hospital is because of a fall in the home. If you’re worried about losing your independence, then a medical alert system ca... 1 Chirp (about 1x per minute): Low-battery chirp. Causes: Low battery. Batteries facing wrong direction. Battery drawer partially open. Battery pull-tab still in place. Solution: Alarms with 9V or AA batteries require fresh batteries at least once per year. Insert a fresh Duracell, Energizer, or Everready battery to stop the chirp. In today’s fast-paced digital world, businesses heavily rely on their servers to keep their operations running smoothly. However, server issues can arise unexpectedly and cause sig... Make a mark inside each outline for the drill holes. Put the unit where it won't get covered with dust when you drill the mounting holes. Using a 3/16-inch (5 mm) drill bit, drill a hole through each pencil mark. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Your AC power may not be on. AC and AC/DC units will have a power indicator light (red or green) that shines when they are receiving electrical power. If you have a 10-year model, the smoke alarm may not have been properly activated.First Alert has many different smoke detector models, so the meaning of the green light can vary. For some models, a steady green light simply means the unit is connected to the preferred power source and working properly. If the green light flashes once per minute, this signals the device is on and functioning correctly in some models.Green: 2 seconds on, 2 seconds off: 7010 Series: Red: Blinks 3 times every 45 seconds: ... LED Light Indicators on First Alert Alarms; Red or Green Light on Alarm;To obtain warranty service, please contact First Alert Support. Please have the model number and date of purchase available when calling. 1-800-323-9005 Mon - Fri (7am - 7pm CST) Sat - Sun (8am - 6pm CST) Related Articles. Smoke/CO Warranty Service and Returns. Number of Views 26.35K.

First Alert GC01 User Manual View and Read online. Est. reading time 27 minutes. GC01 Carbon Monoxide Alarm manuals and instructions online. ... Once a minute, the alarm sounds 3 "chirps", and the green light flashes three times. MALFUNCTION SIGNAL. Based on its Self Test diagnostics, the unit has detected a malfunction. The unit needs to be .... Joyce meyer young pictures

first alert green light

Blue is a primary color and cannot be created by mixing other colors. A light blue paint is made by mixing blue with enough white to reach the desired tint. Adding blue to a light ...Please take the time to read this manual and make this Smoke Alarm an integral part of your family’s safety plan. Key Features of the 7010 and 7010B Smoke Alarm: Photoelectric Smoke Sensing Technology: Generally more sensitive at detecting large particles, which tend to be produced in greater amounts by smoldering fires.View and Download First Alert SC9120B user manual online. Smoke & Carbon Monoxide Alarm. SC9120B carbon monoxide alarm pdf manual download. ... Press and hold to activate test, or to silence the alarm. 2. POWER Light (GREEN)/ SMOKE ALARM Light (RED) 3. CO ALARM Light (RED) 4. Battery Drawer 5. (Behind the Cover) Alarm Horn: …This means that carbon monoxide has been detected in the area, you should move to fresh air and call 9-1-1. 1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide detector. 5 Beeps Every Minute: End of Life. This type of chirp indicates it is time to replace your carbon monoxide alarm.First Alert SA3210 User Manual View and Read online. Est. reading time 21 minutes. SA3210 Smoke Alarm manuals and instructions online. Download First Alert SA3210 PDF manual. ... Once the Low Battery Warning "chirp" silence feature is activated, the unit continues to flash the green light once a minute for approximately 8 hours. After 8 hours ...Why is there a green/red light on my First Alert alarm? What does it mean? This is the power indicator light: First Alert and BRK alarms have a power indicator light to show …In today’s competitive job market, finding the right employment opportunities can be a daunting task. With countless job boards and recruitment websites available, it’s easy to get...The First Alert SCO2 Battery-Operated Combination Smoke and Carbon Monoxide Alarm is easy to install and operate. Equipped with an ionization smoke sensor and an electrochemical CO sensor, it provides 2-in-1 protection from smoke produced by flaming fires and carbon monoxide leaks from multiple sources. Ionization smoke sensor detects …1 How to Install this Smoke Alarm. 2 Optional Locking Features. 3 Regular Maintenance. 4 If this Smoke Alarm Sounds. 5 Understanding the Indicator Lights and Alarm Horn Patterns. 6 Weekly Testing. 7 Latching Feature. Download this manual. Original version. We would like to show you a description here but the site won’t allow us. CO problems can occur any time during the year, and this Alarm can only alert you if it is plugged in and receiving power. This CO Alarm is intended for use in a standard, unswitched 120V AC wall outlet. It is not intended for use in extension cords, power strips, or outlets controlled by a switch or dimmer.St. Louis firefighter died due to faulty breathing equipment, lawsuit alleges. Updated: 3 hours ago. The family of a St. Louis firefighter who died while fighting a fire at an abandoned home in North City has filed a lawsuit, contending that faulty breathing equipment led to his death. News.First Alert is a leading brand of fire safety products, including smoke alarms, carbon monoxide detectors, and combination alarms. Learn how to protect your home and family from fire and carbon monoxide hazards, and explore different models, features, and installation guides for each product category. First Alert also offers wireless and plug-in alarms, voice and location alerts, and tamper ...Noise Output: 85 dB in a T3 Pattern. Single Button: One press to silence and test alarm. Easy Installation: Quick-Connect wiring for easy installation. Standards: UL 217, UL 2034 and UL 1971 for visual signal devices. Warranty: 10 Year Limited. Product Dimensions (LxWxH): 5.5 x 3 x 5.5.in. Product Weight: .87 lbs.Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close. How long is an unused alarm good if it has not been activated? Learn how long alarms last when they haven't been activated yet.One of the most common problems with First Alert Wireless Smoke Detectors is that they don’t seem to detect smoke when there is a fire. The detector needs two minutes of exposure to smoke before it will set off an alarm. If you’re not getting an alarm and you think there’s a problem, try moving it around the house or checking the ...Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close. How long is an unused alarm good if it has not been activated? Learn how long alarms last when they haven't been activated yet.All BRK® and First Alert® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion. Smoke particles of varying number and size are produced in all fires. Ionization technology is generally more sensitive than photo-electric technology at detecting small particles, which tend to be.

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