Smoke detection – International Fire & Safety Journal

Do Fire Alarms Detect Carbon Monoxide? Smoke vs CO Detection

28 July 2026

by Iain Hoey Breaking News

Here’s the short answer: no, most fire alarms don’t detect carbon monoxide. And honestly, a lot of people find this out the hard way, or they never find out at all, which is worse. There’s this assumption floating around that if you’ve got a smoke alarm on the ceiling, you’re covered for pretty much anything dangerous in the air. You’re not. Smoke alarms and carbon monoxide detectors are built to detect completely different things, using different sensors, and mixing them up in your head is exactly how homes end up unprotected against one of the sneakiest hazards out there. Let’s get into why that is and what actually separates a smoke alarm from a carbon monoxide detector.

What Fire Alarms Can Detect?

Fire alarms, what most of us just call smoke detectors, are designed to detect the physical signals that come from a fire: smoke, heat, and sometimes flame patterns, depending on the tech. They watch for particles in the air or a temperature spike, and they go off before things get out of hand, ideally. This is the backbone of fire safety in basically every home and office, and it’s gotten more sophisticated too. A lot of buildings now rely on smart fire detection systems that connect sensors to connected platforms so someone gets notified quickly.

Types of Smoke Alarms

You’ve got ionization alarms (quick on flaming fires), photoelectric ones (better with slow, smoldering fires), and dual-sensor units that try to do both. Each one is tuned specifically to smoke characteristics, not gas levels.

What Triggers a Fire Alarm

Smoke particles break a light beam, or they mess with an ionization chamber’s current that’s basically the trigger. Heat detectors work off temperature crossing a threshold. None of that has anything to do with carbon monoxide molecules, which is part of why relying solely on advanced smoke detection systems leaves a gap that nobody notices until it’s a problem.

Why Carbon Monoxide Is Different

Carbon monoxide isn’t playing the same game as fire. It comes from fuel-burning appliances: furnaces, water heaters, gas stoves, generators, fireplaces basically anything that doesn’t burn fuel all the way through. And unlike smoke, you can’t see it, smell it, or taste it. Nothing. That’s exactly why carbon monoxide poisoning catches people off guard; the symptoms (headaches, dizziness, nausea, confusion) show up after exposure has already been happening, sometimes for a while. Smoke detectors just aren’t built for this. Their sensors respond to particles and light disruptions, not gas; there’s no mechanism in a standard unit that would ever pick up on rising CO levels.

This is part of why fire safety experts keep pushing for separate or combined detection rather than assuming one device does it all. Groups behind global fire safety standards have been pretty consistent about this: CO detection needs electrochemical, biomimetic, or metal oxide semiconductor sensors, which is a totally different animal from smoke sensing. Carbon monoxide can build up quietly overnight, so home carbon monoxide safety really can’t rely on guesswork.

Do Standard Fire Alarms Detect Carbon Monoxide?

So, straight answer again: do fire alarms detect carbon monoxide? Not unless they’re specifically built as combination units. Most standard smoke alarms, the ones already installed in a lot of older homes only do one job. Smoke and heat, that’s it. If your furnace started leaking CO in the next room, a regular smoke alarm wouldn’t say a word about it. It would just sit there, silent, no matter how bad the air got. That’s the real gap between plain smoke alarms and a combination smoke and carbon monoxide alarm. Combination units pack two sensor systems into one housing: a smoke sensor plus a dedicated CO sensor (usually electrochemical) that reads gas concentration in parts per million.

Once CO crosses a dangerous threshold, the device sounds off, often with a different beep pattern or tone than the smoke alert, so you actually know which problem you’re dealing with. Why does the confusion stick around? Probably because so many combination products are on the market now that people just assume every fire alarm covers CO by default. It doesn’t work that way. The only real way to know is to check the box, the model number, or the manufacturer’s spec sheet. And for larger properties requiring more coverage, pairing gas detection solutions with standard fire alarm systems tends to close that gap effectively.

Smoke Alarms vs Carbon Monoxide Detectors

Putting a smoke alarm vs carbon monoxide detector side by side makes it pretty obvious why you’d want both, not one or the other.

Detection Method

Smoke detectors use optical or ionization technology that detects airborne combustion particles. Carbon monoxide detectors use electrochemical, semiconductor, or biomimetic sensors that chemically react with CO in the air and turn that reaction into a signal.

Installation Locations

Smoke alarms go on every level of the house, in each bedroom, and just outside sleeping areas. Smoke tends to rise and spread through ceilings, so that placement makes sense. Carbon monoxide detectors work best near sleeping areas and close to fuel-burning appliances, since CO doesn’t rise the way smoke does; it just mixes evenly into the air. This is basically the whole reason knowing where to install carbon monoxide detectors actually matters, not just owning one.

When Each Alarm Activates

Smoke alarms react within seconds once particle density hits fire or smolder levels. Carbon monoxide alarms take longer; they need gas concentration to build up over a certain window before sounding, so response time isn’t fixed; it depends on how bad the leak is. That gap alone is reason enough that one can’t replace the other, and it’s why many modern fire alarm systems now just bundle both in.

Combination Smoke and Carbon Monoxide Alarms

A combination smoke and carbon monoxide alarm puts both detection types under one roof, so to speak. Instead of two separate boxes on your ceiling, you get a single unit that continuously monitors for smoke particles and CO levels. Most of these use different alarm patterns, beep sequences, and sometimes actual voice alerts, so you know right away whether it’s a fire or a gas issue. A lot of the newer combination alarms also include a digital display showing live CO readings, battery status, and a heads-up when the unit’s nearing the end of its life.

The upside isn’t just fewer gadgets on the wall, though that helps. Fewer devices means less maintenance, simpler testing, and it’s often cheaper than buying two separate units outright. For homes, especially ones with gas furnaces, water heaters, or an attached garage, a smoke and CO detector combo gives solid coverage without turning every hallway into a wall of blinking lights. Smaller commercial spaces benefit too. Offices, rental units, and multi-family buildings: property managers juggling several units tend to find combination alarms easier to standardize, so every tenant gets the same protection against fire and carbon monoxide poisoning without running two separate testing schedules.

Best Practices for Installing and Maintaining Smoke and CO Alarms

Placement is where most of this starts. Smoke alarms belong inside every bedroom, just outside sleeping areas, and on every floor, including the basement. Carbon monoxide detectors do best near sleeping areas and somewhere close to fuel-burning appliances, though not right on top of them, or you’ll get false readings. Testing matters just as much, maybe more. Test smoke and carbon monoxide alarms once a month using the test button; it takes 10 seconds, and swap batteries at least yearly, or the second you hear that low-battery chirp. Even hardwired units with battery backup still need this check; don’t assume they’re fine just because they’re wired in.

Then there’s the service life question, which people constantly forget about. Smoke alarms generally need to be replaced every 8 to 10 years. CO sensors, especially electrochemical ones, often need to be replaced every 5 to 7 years, even if the unit seems to be working fine. Check the label for the actual expiration date rather than guessing. For bigger homes, interconnected smoke and CO alarms are worth the extra step. One unit detects smoke or gas, and every connected alarm in the house goes off together, so nobody in a back bedroom sleeps through a warning because it was too far from the source. This kind of setup shows up more and more in home carbon monoxide safety recommendations and building codes for good reason.

Final Verdict

To sum this up, do fire alarms detect carbon monoxide? Standard ones don’t, and assuming otherwise leaves a real hole in your home’s safety setup. The difference between a smoke alarm and a carbon monoxide detector comes down to what they’re built to sense: one reacts to combustion particles, the other to a specific gas from incomplete fuel burning. If you want full coverage, either run both a smoke detector and a standalone CO alarm, or just go with a combination smoke and carbon monoxide alarm and let it handle both. Either way, keep up with testing, put them in the right spots, and replace them on schedule. This isn’t about having extra gadgets around; it’s about properly covering two distinct risks with tools built for each.

Frequently Asked Questions

Can a smoke alarm detect carbon monoxide?

No. Standard smoke alarms only detect smoke and heat; they don’t have the sensors needed to detect carbon monoxide.

What is the difference between a smoke alarm and a carbon monoxide detector?

A smoke alarm reacts to airborne smoke particles from fire. A carbon monoxide detector uses chemical sensors to measure CO gas levels in the air instead.

Are combination smoke and carbon monoxide alarms worth installing?

Pretty much, yes. They reduce installation hassle and maintenance while covering both fire and CO risks in a single device.

Where should carbon monoxide detectors be installed?

Near sleeping areas and close to fuel-burning appliances, just not directly next to them, or you’ll risk inaccurate readings.

How often should smoke and carbon monoxide alarms be tested?

Monthly testing is the standard recommendation, with yearly battery swaps and full unit replacement every 5 to 10 years, depending on the device.

How Often Should You Replace Smoke Alarms? Best Practices for Fire Safety

24 July 2026

by Iain Hoey Breaking News

Smoke alarms are the quiet guardians of every home, yet few devices are taken for granted quite so easily. Once fitted to the ceiling, they tend to be forgotten until they chirp for a new battery. The trouble is that smoke alarms do not last forever. The sensors inside them degrade gradually with age, dust, humidity, and everyday household conditions, which means an alarm can look perfectly fine on the outside while offering far less protection than it did on the day it was installed.

So, how often should you replace smoke alarms? Fire safety authorities around the world agree on a clear answer: every ten years, regardless of how well the unit appears to be working. Understanding this replacement timeline, and building it into your home fire safety routine, is one of the simplest and most effective steps any household can take. This guide explains when to replace your alarms, the warning signs to watch for, and how to maintain them properly in the meantime.

How Often Should You Replace Smoke Alarms?

The short answer to how often should you replace smoke alarms is every ten years from the date of manufacture, not the date of installation. This recommendation comes from leading fire safety bodies, including the U.S. Fire Administration (USFA) and the National Fire Protection Association (NFPA), and it is echoed by fire and rescue services across the US, UK, Europe, Australia, and beyond.

Why ten years? The sensing technology inside a smoke alarm, whether ionization or photoelectric, loses sensitivity over time. Airborne dust, cooking residue, insects, humidity, and temperature swings all take a toll on the internal components. Research cited by fire safety agencies suggests that after a decade of continuous operation, an alarm’s ability to detect smoke reliably can drop significantly. In other words, smoke alarm expiration is not a marketing gimmick; it is a genuine safety threshold.

The smoke alarm lifespan of 10 years applies to the entire unit, not just the battery. Many homeowners assume that a fresh battery restores an alarm to full working order, but a new battery cannot revive a worn-out sensor. Once the unit reaches the end of its life, complete smoke alarm replacement is the only safe option.

Replaceable-Battery vs Sealed 10-Year Smoke Alarms

Modern smoke alarms generally fall into two categories. Traditional units use replaceable batteries, typically 9-volt or AA cells, which need to be replaced at least once a year. These alarms still require full replacement after ten years, even if they have been maintained diligently.

Sealed-unit alarms, by contrast, contain a tamper-proof lithium battery designed to power the device for its entire ten-year lifespan. When the battery finally runs down, the whole alarm is replaced in one step. Many fire services now recommend sealed 10-year alarms because they remove the temptation to borrow a battery for the TV remote and eliminate the risk of an alarm sitting empty for months.

Follow the Manufacturer’s Recommendations

Every alarm carries a date of manufacture printed on the back of the unit. Manufacturers such as First Alert and Kidde advise counting ten years forward from that date, and some models now include an end-of-life warning chirp that sounds when the unit expires. Whichever brand you choose, the manufacturer’s instructions should always be your first reference for smoke alarm installation, testing, and replacement timelines.

Replacing alarms on schedule is a small cost compared with the protection they provide. Working smoke alarms remain one of the strongest predictors of survival in a house fire, cutting the risk of dying roughly in half.

Signs It’s Time to Replace Your Smoke Alarm

While the ten-year rule is the baseline, certain warning signs mean you should replace smoke detector units sooner. Treat any of the following smoke detector warning signs as a prompt to act immediately rather than waiting for the calendar.

The Alarm Fails Its Test

Every alarm has a test button, and pressing it should produce a loud, piercing tone. If the sound is weak, delayed, or absent even after fitting a fresh battery, the unit can no longer be trusted. Regular smoke alarm testing is the single most reliable way to catch a failing device before it matters.

Persistent Chirping After a Battery Change

An intermittent chirp usually signals a low battery. However, if the chirping continues after you have correctly installed a new battery, the alarm may have reached the end of its life. Many modern units chirp in a distinct pattern precisely to announce smoke alarm end of life, so consult the manual rather than simply silencing the noise.

Visible Physical Damage or Discoloration

Cracked casings, melted plastic, heavy yellowing, or a unit caked in dust and grease all point to a compromised alarm. Yellowing in particular often indicates prolonged exposure to heat or simply advanced age, and it is a common trait of outdated smoke alarms.

Frequent False Alarms

Occasional nuisance alarms from cooking are normal, but an alarm that triggers constantly without cause may have a deteriorating sensor. Ironically, households often respond by removing the battery, which is the most dangerous outcome of all. A misbehaving alarm should be replaced, never disabled.

The Unit Is Simply Too Old

If you have moved into a property and cannot find a manufacture date on the alarm, or the date has worn away, assume it is overdue. When in doubt, replace it. A new alarm costs little; an expired one can cost everything.

Smoke Alarm Maintenance to Maximize Reliability Before Replacement

Good smoke detector maintenance will not extend an alarm beyond its ten-year lifespan, but it will keep the unit performing at its best throughout those years. A few minutes each month is all it takes.

Test Smoke Alarms Monthly

Press and hold the test button on every alarm in the home at least once a month. Listen for a strong, consistent tone, and make sure the sound is audible from bedrooms with the doors closed. Interconnected smoke alarms should all sound together when one is tested; if any unit stays silent, investigate straight away.

Replace Batteries on Schedule

For alarms with removable batteries, replace the battery at least once a year, or immediately when the low-battery chirp begins. The NFPA suggests pairing battery changes with clock changes in spring or autumn, a simple habit that makes the task hard to forget. Sealed 10-year units skip this step entirely.

Keep the Unit Clean

Dust and cobwebs can block the sensor chamber, causing false alarms or missed detections. Every six months, gently vacuum around the vents using a soft brush attachment, and wipe the exterior with a dry cloth. Never paint over a smoke alarm or apply stickers to it.

Check the Manufacture Date

Twice a year, glance at the date printed on the back of each unit and note when the ten-year mark will arrive. Recording replacement dates in a phone calendar turns a forgettable chore into an automatic reminder, and it complements the broader habits covered in our guide to home fire safety.

Conclusion

The answer to how often should you replace smoke alarms is refreshingly simple: fit new units every 10 years, and sooner if an alarm fails a test, chirps persistently, shows signs of damage, or triggers false alarms without cause. Between replacements, monthly testing, annual battery changes, and routine cleaning keep every device ready to respond in the seconds that matter most.

Smoke alarms are inexpensive, widely available, and easy to install, yet they remain the most effective early warning system a household can own. Campaigns by fire services worldwide continue to stress smoke alarm safety for good reason: working alarms save lives, and expired alarms create a false sense of security. Take five minutes this week to check the age of every alarm in your home. If any unit is approaching its tenth birthday, replace it without delay; it is one of the cheapest life-insurance policies you will ever buy.

FAQs

Why should smoke alarms be replaced every 10 years?

The internal sensors degrade over time due to dust, humidity, and continuous operation. After roughly a decade, an alarm may fail to detect smoke reliably, even if it still responds to the test button. Hence, fire safety authorities recommend full replacement at the ten-year mark.

How can homeowners tell if a smoke alarm needs replacing?

Key indicators include a failed or weak test tone, chirping that continues after a fresh battery is fitted, visible damage or yellowing, frequent false alarms, and any unit older than ten years or with an unreadable manufacture date.

Can replacing the battery extend the lifespan of a smoke alarm?

No. A new battery only restores power; it cannot repair an aging sensor. Once the unit is 10 years past its manufacture date, the entire alarm must be replaced.

Where can the manufacture or expiration date be found on a smoke alarm?

The date of manufacture is printed on a label on the back of the unit. Remove the alarm from its bracket to check it, then count ten years forward to find the replacement date.

What are the risks of using a smoke alarm that is more than 10 years old?

An expired alarm may respond slowly to smoke or fail to sound at all, delaying escape during a fire. Because the unit still looks normal, occupants gain a dangerous false sense of security.

FFE Sensis smoke detection range targets data centres and secure facilities

17 November 2025

by Iain Hoey Breaking News Fire Detection Products

New smoke detection platform for early warning

FFE has launched its Sensis aspirating smoke detection range for sites where very early warning and stable performance are required.

The company said the system is designed for environments where conventional point detectors can be harder to apply or may not provide early enough response.

Target applications include data centres, high-security facilities, warehousing and logistics, libraries and archives.

FFE stated that Sensis is intended as a single aspirating smoke detection platform that can be deployed across these varied building types.

Single chamber approach to EN54-20 classes

According to FFE, the core of the Sensis range is a “one chamber” design philosophy.

Each Sensis detector can be configured to meet EN54-20 Classes A, B and C using the same detection chamber.

The company contrasted this with aspirating smoke detection systems that use different chambers for each sensitivity class.

FFE noted that using a single chamber for all three classes can reduce the chance of incorrect product selection for a given site.

It added that this approach can also simplify stockholding and specification activity for project teams.

Blue-light technology and on-board tools

FFE reported that Sensis uses blue-light detection technology to increase sensitivity to the small smoke particles associated with incipient fires.

By using blue light instead of red laser or LED sources, the system is designed to detect early-stage smoke more quickly while maintaining stability under normal conditions.

The manufacturer explained that the Sensis 500 and Sensis 2000 models include on-board programming so configuration can be carried out directly on the detector.

This feature is aimed at data centres and high-security locations where laptops may be restricted or not permitted on site.

FFE said that once engineers are familiar with Sensis Flow and SensisTool, they can apply the same software tools across the full Sensis aspirating smoke detection range.

This is intended to streamline training, commissioning and ongoing configuration work for installers and commissioning engineers.

Event logging and Smart Smoke Level operation

FFE stated that Sensis provides extensive event logging to support fault-finding and post-event review.

Each detector can store up to 180,000 events for later interrogation.

The company indicated that this depth of recorded history can help maintenance teams review site behaviour over time, recognise trends and examine incidents in more detail.

Another element of the platform is SSL – Smart Smoke Level – which FFE describes as a dynamic background algorithm.

SSL continuously gathers information on ambient particulate levels and calculates an average contamination baseline.

Alarm thresholds are then controlled so they remain above naturally occurring contamination levels.

FFE said this is intended to support stable day-to-day operation and lower the likelihood of unwanted alarms in more challenging environments.

With Sensis, the company aims to combine very early warning detection performance, algorithm-based stability and installer-focused features in one aspirating smoke detection platform that can be used across a broad range of sectors and building types.

Operational considerations for specifiers and engineers

System installers and fire-protection contractors working in data centres, high-security facilities, warehousing and archives can apply Sensis where very early warning is required but point detectors are less practical.

Equipment specifiers and fire engineering consultants can use the single-chamber coverage of EN54-20 Classes A, B and C to simplify product selection, documentation and stock management across projects.

For commissioning engineers, on-board programming on Sensis 500 and 2000 offers a configuration route on sites where laptop access is limited or controlled.

Facility managers and risk assessors can draw on the 180,000-event log to review site behaviour over extended periods and to support incident investigation.

In environments with fluctuating background contamination, the SSL – Smart Smoke Level – algorithm provides a method of maintaining alarm thresholds above typical particulate levels, which can help manage unwanted alarms in day-to-day operation.

Safety done smarter, with Apollo

17 January 2025

by Iain Hoey Breaking News Fire Detection

Evolving to meet the new UL 7th Edition standard, Apollo reveals how innovative designs in smoke detection balance reliability with next-level, intelligent performance.

Underwriters Laboratories (UL) have recently introduced new requirements for smoke detectors and interface modules. Apollo has responded by building the most solid, stable, and dependable fire detector yet based on their decades of experience and innovation in fire detection.

From January 14^th – 16^th, Apollo will be exhibiting at Intersec 2025, inside the UK pavilion at the Dubai World Trade Centre. Hall 4 – stand G33. The company will be showcasing its upcoming sounder bases along with the UL offering. Find out more about the offering below.

The challenge

One of the biggest challenges customers face is false alarms. UL knows this too, and through research conducted by the National Institute of Standards and Technology (NIST), they have introduced new requirements for smoke detector manufacturers, like Apollo, to reduce the risk of false alarms. At the same time, UL has responded to the evolution of construction methods and materials that can change how fire behaves in a building. This has led to the introduction of a new fire test requiring faster and earlier detection of flaming fires than ever before.

Apollo’s solution

Apollo focuses on getting the basics right. This starts with the performance characteristics of the smoke sensors. Key benefits include:

Integrated isolators: Soteria UL Detectors and Modules have integrated isolators to reduce installation costs. Integrated isolators ensure the highest possible safety against loop failures such as short circuits, allowing for the creation of Class X systems.
UL864 10^th Edition compliance: Fully compliant with UL864 10th Edition, including all earth fault detection functionality (Modules only – Smoke detectors are fully compliant to UL268 7^th Edition)
Robust design: Developed with improved immunity against external electromagnetic interference and adverse environmental conditions.
LED indicators: Equipped with tri-coloured LEDs for clear status indications: red for alarm, green for polling, yellow for isolation, and flashing yellow for fault.
Ease of installation: Quick and easy installation with SEMs terminals that accept US fire cabling as standard. Compatible with standard US back boxes.

Mitigating against false alarms

An optical smoke sensor must be protected from stray light, dust, and insects. These roles are all fulfilled by the enclosure, which is referred to as the optical chamber. While blocking these potential nuisances, the chamber must freely admit smoke, allowing it to be measured by the optical sensor.

This has led to the unique chamber design of Soteria UL, which collects smoke from the outer edges of the detector, removing impediments to airflow and achieving particularly fast fire detection.

Addressing smouldering fires

Smouldering fires often generate vast amounts of smoke without sufficient heat to propel it into the detector. This problem worsens with the stack effect, where pressure differentials between the ceiling cavity and a room prevent smoke from entering the detector. Soteria UL overcomes this with a patented vent design, which:

Allows pressure differentials to be exhausted through a carefully positioned lid hole, ensuring unimpeded smoke flow.
Enables condensation from ceiling cavities or cable conduits to escape without harm.

Superior directionality and optics

Uniform performance is critical, no matter the smoke’s direction. UL tests detectors in four orientations, allowing a variation of ±/-50%. Apollo exceeds this by testing detectors at 360 orientations and achieving a variation of less than 10%/ft. This ensures balanced sensitivity, avoiding the need for overly sensitive settings that could trigger false alarms.

Once smoke enters the chamber, the optical sensor measures it while discounting false readings. Apollo’s optical sensor uses an industrially rated InfraRed (IR) light source and a custom Application Specific Integrated Circuit (ASIC) to detect scattered light caused by smoke.

“By leveraging Mie theory, which explains how smoke particles scatter light, the patented optical sensor design distinguishes between smoke from fires and aerosols produced by cooking or other nuisances.”
Apollo

Advanced dust and insect defence

Traditional detectors often suffer from IR light reflecting off chamber walls due to dust or insects. Soteria UL uses a serpentine air inlet to block dust and a fine nylon mesh to prevent larger insects. For smaller particles, the chamber design:

Utilises a patented light-absorbing surface to prevent IR light reflection.
Eliminates surfaces where insects or dust could interfere with the sensor.

This ensures that even under challenging conditions, Soteria UL maintains reliable performance without false alarms.

Precision manufacturing

Every Soteria UL detector is produced and certified to conform to a narrow range of sensitivity. This guarantees consistent behaviour across all units, avoiding variability in sensitivity to nuisances or fire attributes. A blend of skilled hand assembly and automated processes ensures exceptional quality. Each product is individually measured and calibrated for smoke sensitivity.

Rigorous quality control protocols are implemented at every stage of production, utilising advanced testing equipment to verify performance standards. The precision manufacturing process also incorporates state-of-the-art materials and components, enhancing durability and reliability. This attention to detail ensures that Soteria UL detectors perform optimally in diverse environments, providing dependable protection against fire hazards.

Intelligent signal processing

With a strong foundation in sensor performance, Apollo’s intelligent signal processing balances the need for fast fire detection with false alarm prevention. By avoiding overly complex algorithms, it achieves reliable performance with optimal smoothing, delay, and enhanced detection for fast-flaming fires.

The detector processes information continuously and signals the panel with exceptional speed when it identifies a fire. The system integrates adaptive learning capabilities, allowing it to adjust to varying environmental conditions and improve accuracy over time. Advanced filtering techniques are employed to distinguish between genuine threats and benign disturbances, ensuring that responses are both swift and precise.

Keeping you safe

Keeping people safe from fire, every second of every day. From January 14-16, Apollo will be exhibiting at Intersec 2025, inside the UK pavilion at the Dubai World Trade Centre. Hall 4 – stand G33. The company will be showcasing its upcoming sounder bases along with the UL offering.