After Being Silenced For 3 Years, Ex-Employee Of [REDACTED] CO Detector Company Reveals The Disturbing Truth: Most CO Detectors Don't Go Off In Time To Save A Child

By Mark Dalton

Former CO detector engineer · September 10, 2026

My name is Mark Dalton. For almost 12 years, I helped design carbon monoxide detectors for one of the largest safety brands in the country.

The kind of detector that is very likely sitting on a wall in your home right now.

I'm writing this for the parents I think about the most. The ones who:

• Have a carbon monoxide detector on the wall, and trust that it is keeping their kids safe.
• Assume that if there were ever a leak, the alarm would wake everyone up in plenty of time.
• Believe carbon monoxide poisoning is a rare, freak accident that happens to other families, in other homes.
• Think every detector is basically the same, so the cheap one from the hardware store is good enough.

I understand why you would believe all of that.

I helped build the products that taught you to.

But after almost 12 years on the inside, I can tell you none of it is true. And the reason comes down to one number almost no parent has ever heard of.

Here is what I found out once I started building these devices myself: the carbon monoxide detector in your home was never designed to save your kids. It was only ever built for adults.

He Boils It Down To 3 Things Every Parent Should Know

1. The carbon monoxide detector on your wall is built to a legal minimum, a standard set back in 1992. It uses the cheapest sensor that still meets that standard, and almost every brand on the market builds to it and not one inch further.
2. That standard was set around the body of a grown adult. A child is far smaller, breathes far faster, and is overcome by carbon monoxide at levels an adult would simply shrug off.
3. So the detector you are counting on can stay completely silent while the air around your child has already turned deadly. By the time it finally sounds, it can already be too late for them.

It took me years to be able to say any of this out loud.

I had to wait for the non-disclosure agreement I signed to finally expire, and even now I am not legally allowed to tell you the name of the company I worked for.

But I am no longer bound from telling you the truth about how these detectors are built, and what that standard really means for your kids.

The Truth About The CO Detector Industry

Every company wraps its detector in reassuring safety branding: "UL Listed," "meets national safety standards," a seal on the box.

But all that really means is that the device clears a minimum standard written more than 30 years ago.

You see, every standard carbon monoxide detector is legally allowed to stay completely silent until carbon monoxide in the air reaches 70 parts per million, or 70 PPM.

That threshold was set in 1992.

And it was calculated around a healthy, full-grown adult, roughly a 180-pound man. Not a toddler. Not a 7-year-old. Not a small child asleep in a bedroom down the hall.

The result is a quiet tragedy that repeats every single year.

Thousands of children are poisoned by carbon monoxide in homes with working detectors on the wall, and thousands more will be poisoned this winter.

Those detectors will do exactly what they were built to do. And that's the problem.

Why 70 PPM Is Already Too Late For A Child

A child's body is much smaller than an adult's, and a child breathes about twice as fast.

So when carbon monoxide fills a room, it floods a child's bloodstream far faster, and it takes far less of it to become deadly.

A level of carbon monoxide that might give a grown adult a mild headache can put a child down for good. A child can lose consciousness, or worse, at around 50 PPM.

For the smallest children, it takes even less.

Read that again. A child can be overcome at 50 PPM, while the carbon monoxide detector on the wall is legally allowed to stay completely silent until 70 PPM.

That's Why 57% Of Standard Detectors Fail To Save A Child

When the CDC tested 30 of the most common carbon monoxide detectors, 57% of them failed to alert at levels that were already deadly to a child.

And the ones that did go off were barely better.

Every one of them is built to stay silent until carbon monoxide reaches 70 PPM, the level where, for a small child, whether they live or die has already become a coin flip.

And the detector on your wall, whether it came off a store shelf or came with your home, was built to that exact same standard. Not one of them was built with a child in mind.

And It Doesn't Take A Broken Appliance

Here is what makes all this even more frightening…

A carbon monoxide leak does not take an old or a broken appliance.

A furnace that runs perfectly, even if it passed an inspection a week ago, can develop a hairline crack on any ordinary night it runs. And that's all it takes for carbon monoxide to start pouring into the air your children are breathing.

You would have no idea. No smell. No sound. No warning of any kind.

Just an invisible gas filling the rooms where your family sleeps, and a detector on the wall that will not make a sound until it is already too late.

The Only Detector Built To Protect Your Kids, Not To Pass A Test

When I left the industry, I went looking for a detector built the way I always believed they should be.

And I found it. It's called TrueDetect.

TrueDetect does not wait for carbon monoxide to reach a level set for a grown man in 1992.

It sounds the alarm at 30 PPM, hours earlier, long before your children are ever in danger, with plenty of time to get them safely out of the house.

• It reads carbon monoxide from just 1 PPM on a live screen, so you can see a problem the moment it begins, long before it becomes an emergency.
• It uses a hospital-grade electrochemical sensor, the same kind used in fire stations and emergency rooms.
• It sends an alert to every phone in the family the instant a leak starts. Even on silent mode. Whether you are in the next room, or three states away.
• It runs for a full 10 years, and tells you when it finally needs replacing, so it never quietly dies on the wall the way most detectors do, with no one realizing.

Put one on each level of your home, near the furnace and the rooms where your kids sleep, and carbon monoxide can't climb to a dangerous level without you knowing, wherever you happen to be.

It is everything I wish we had built. And everything my former employer chose not to.

It's The Only Detector I Would Put In My Own Home

The day I truly understood what I just explained to you, I went home and pulled every old detector off my walls.

And I put a TrueDetect right outside my kids' bedrooms, one down by the furnace, and one more on every floor in between.

Because once you know what I know, this is not something you leave to chance.

It is far too easy for a child to slip away in the night, in a home that looks perfectly safe, with a detector on the wall that never makes a sound.

My kids are the reason I waited three years to be able to write this.

And TrueDetect is the reason I can finally sleep at night knowing they're safe.

The Choice Every Parent Has To Make

The decision in front of you is simple.

Option 1: Put a TrueDetect in your home.

And if for any reason it's not for you, it is backed by a 90-day money-back guarantee, so you have risked nothing.

And if a leak ever does start one night, it catches it at 30 PPM, while there is still plenty of time to get your children out. And you never have to find out what would have happened otherwise.

Option 2: Leave the detector that is already on your wall, the one built to a 1992 standard, the one that stays silent until 70 PPM, and hope a leak never starts in your home.

You only get to make this choice now, before anything happens.

So I really hope you make the right one.

From what I hear, they're running a special discount right now, up to 60% off, so if I were you, I would grab a few before they're gone.