Yes, walk-through metal detectors are safe for every traveler who passes through them, including pregnant travelers, people with medical implants, and frequent flyers. These machines have been studied for decades and are used in airports around the world without harming the people who walk through them.
As a manufacturer of walk-through metal detectors, including the TSA and ECAC certified Garrett PD 6500i used at airports around the globe, we understand the concern from travelers. Our team at Garrett will explain exactly how these machines work, what the science says about their safety, and how to handle screening if you have a medical concern.
How Airport Metal Detectors Work
The Technology Behind the Arch
A walk-through metal detector works by sending brief pulses of electrical current through coils built into the panels on each side of the archway. These pulses create a weak magnetic field that fills the space you walk through. The Garrett PD 6500i, for example, uses this exact process across 33 individual detection zones to scan the body from head to toe.
When metal passes through that magnetic field, it disrupts the field in a way the detector can measure. The machine reads that disruption and sounds an alarm if the disruption matches what walk-through detectors are built to catch. No part of this process involves anything entering or being absorbed by your body.
Non-Ionizing vs. Ionizing Radiation
The word radiation makes many people nervous, but not all radiation is the same. Non-ionizing radiation, which is what walk-through metal detectors use, carries very low energy. It can move electrons around slightly, but it cannot knock them loose from atoms or molecules.
Ionizing radiation is different. It carries enough energy to strip electrons away from atoms, which can damage DNA and human cells over time. Walk-through metal detectors never reach that energy level, so they cannot cause the kind of cell damage that ionizing radiation can.
| Radiation Type | Energy Level | Can It Damage Cells or DNA | Example |
| Non-ionizing | Low | No | Walk-through metal detectors, radios, Wi-Fi |
| Ionizing | High | Yes, with enough exposure | X-rays, gamma rays, CT scans |
No X-Rays Involved
A lot of the fear around airport screening comes from mixing up different machines. Walk-through metal detectors, like the archways you walk through at a checkpoint, do not use X-rays at all. They rely only on the low-energy magnetic field described above, which is the same basic principle behind magnetometer security screening used at many other types of facilities.
X-ray technology is reserved for scanning bags and cargo, never people. Full-body imaging scanners, which some airports also use, rely on a separate technology called millimeter wave, which is also non-ionizing. Understanding which machine is which helps clear up most of the fear behind this search.
Is It Safe to Walk Through a Metal Detector While Pregnant?
Yes, it is safe for pregnant travelers to walk through a metal detector, and there is no known risk to the pregnancy or the developing fetus. The low-frequency magnetic field used in these machines is fundamentally different from the ionizing radiation that raises real medical concern during pregnancy.
Health authorities and radiation safety agencies around the world have reviewed this technology and found no evidence of harm from walk-through metal detectors. If you want extra peace of mind, you can always ask a security officer for alternative screening, such as a pat-down or a check with one of the handheld metal detectors used at most checkpoints, and this request is honored at airports worldwide.
Metal Detectors and Medical Devices
Pacemakers and Defibrillators
Walking through a metal detector is considered safe for people with pacemakers or implanted defibrillators. That said, official guidance still recommends telling the security officer about your device before you walk through the archway, just as a precaution.
If you would rather avoid the archway altogether, you have the right to request a pat-down instead in most airports. This gives you full screening without needing to pass through the magnetic field at all.
Artificial Joints, Plates, Screws, and Surgical Implants
Metal implants like artificial joints, plates, screws, and surgical hardware are also safe to bring through a walk-through metal detector. The magnetic field does not interact with these implants in any way that could cause harm or move them.
The one thing to expect is that these implants may set off the alarm, since the detector is designed to react to metal. That is not a safety problem. It is simply the machine doing its job, and it leads directly into what you should do next.
What to Do If You Have an Implant
Metal implants are common, and airports screen travelers with them every single day without any issues. Knowing what to expect ahead of time can make the process faster and less stressful for you. If you have a metal implant and want to make your screening experience smoother, a few simple steps can help.
- Carry a medical ID card if you have one
- Inform the security officer before you walk through the detector
- Request alternative screening methods if you prefer them
- Know your rights regarding screening alternatives, since these can vary by country
Following these steps does not guarantee you will skip the alarm entirely, since metal implants are designed to be detected. What it does is help security staff understand the situation right away, which usually speeds things up. Most travelers with implants find that screening becomes routine once they know these steps by heart.
Does Repeated Exposure Add Up? Safety for Frequent Flyers and Airport Staff
Frequent travelers and airport employees often wonder if walking through a metal detector many times a week could build up over time. This is a fair question, since it is true for some types of radiation exposure.
The answer for walk-through metal detectors is no. Because the magnetic field is non-ionizing and carries such low energy, there is no cumulative effect the way there can be with ionizing radiation exposure.
A person who walks through a detector daily, whether a business traveler, a member of airline crew, or a security officer running effective security screening at a checkpoint, is exposed to the same low, harmless level each time, with nothing building up in the body.
Metal Detectors vs. Other Airport Screening Technology
Part of the confusion travelers feel comes from not knowing which airport machine does what. Airports typically use three different technologies, and only one of them ever involves radiation that requires caution. The table below breaks down the differences so you can see exactly what each machine does and how it works.
| Screening Technology | What It Uses | Used On | Radiation Type |
| Walk-through metal detector | Low-frequency magnetic field | People | Non-ionizing |
| Full-body scanner | Millimeter wave imaging | People | Non-ionizing |
| X-ray baggage scanner | X-ray imaging | Bags and cargo only | Ionizing |
Why Airports and Security Agencies Trust This Technology
Walk-through metal detectors used in airports must meet strict international standards before they are ever installed at a checkpoint. The Garrett PD 6500i, for instance, is certified to meet requirements set by the Transportation Security Administration, the European Civil Aviation Conference, and other regulatory bodies around the world. These certifications are a core part of any serious security planning process for a checkpoint.
As a manufacturer, our role goes beyond building the equipment. We test every unit against these safety standards, and we design features like adjustable sensitivity zones, calibration tools, and secondary options such as the benefits of security wands so airports can keep their screening accurate and consistent. Well-calibrated equipment does more than catch prohibited items. It also keeps the process reliable for the millions of passengers who pass through it every day.
The Technology That Keeps You Safe: Garrett PD 6500i
When you walk through a metal detector at the airport, there is a good chance it is a Garrett PD 6500i, one of the most certified walk-through detectors in the world. Every part of its design reflects decades of safety testing and regulatory review, so you can walk through with confidence. Here is a closer look at what makes it safe and reliable for the millions of travelers who pass through it every day.
| Feature | Specification | What It Means for You |
| Detection Technology | Low-frequency, non-ionizing magnetic field | Uses the same safe, low-energy technology found in radios and Wi-Fi, not X-rays |
| Detection Zones | 33 zones (left, center, right) | Pinpoints exactly where metal is detected, so screening is quick and you are not held up longer than needed |
| Regulatory Certifications | TSA, ECAC, and other international standards | Independently tested and approved for electromagnetic safety before ever being used on a traveler |
| Passageway Size | 30 inch standard, with a 32.5 inch ADA-compliant option | Comfortable, accessible passage for travelers of all mobility needs |
| Detection Technology | Bilateral detection with transmitters and receivers in each panel | Provides thorough, even scanning without needing extra passes through the archway |
| Power | Fully automatic 100 to 240 VAC, 45 watts | Runs at a stable, low power level with no adjustments that could affect safety |
| Medical Safety Review | Extensive research on pregnancy and medical devices | No adverse effects found on pregnancy, pacemakers, or other medical devices |
| Construction | Scratch and mar-resistant laminate with aluminum detection heads | Built for consistent, reliable performance every time you walk through |
For a traveler, all of this adds up to one simple fact: the archway you walk through is designed with your safety as the top priority. The magnetic field it uses is weak, non-ionizing, and has been tested against pregnancy and medical device concerns without finding any harm. Whether you fly once a year or several times a week, you can walk through this technology knowing it was built and certified with your wellbeing in mind.
Frequently Asked Questions
Can metal detectors harm a fetus?
No. Walk-through metal detectors use non-ionizing, low-frequency magnetic fields, which carry far too little energy to affect a developing fetus.
Are metal detectors safe for children?
Yes. The same low-energy, non-ionizing technology that makes these machines safe for adults makes them safe for children of any age.
Will a pacemaker set off a metal detector?
It might, since pacemakers contain metal, but passing through the detector will not affect how the device functions. Travelers with pacemakers can still request a pat-down if they prefer.
Can you request a pat-down instead of walking through a scanner?
Yes. Travelers can ask for alternative screening, such as a pat-down, at airport checkpoints, though the exact process can vary depending on the country and airport.
Do metal detectors use the same technology as X-ray machines?
No. Walk-through metal detectors rely on non-ionizing magnetic fields, while X-ray machines use ionizing radiation and are only used to scan bags and cargo, never people.
Understanding The Safety Measures Behind Airport Metal Detectors
Walk-through metal detectors are safe for everyone who passes through them, from pregnant travelers to people with pacemakers or artificial joints to frequent flyers who go through security several times a week.
The technology relies on a weak, non-ionizing magnetic field that cannot damage cells or DNA, and it has no cumulative effect no matter how often you are screened. At Garrett, we have spent decades designing and certifying walk-through metal detectors to meet the highest safety and performance standards used at airports worldwide.
If your airport is ready to upgrade its checkpoint screening equipment, our team can help you find the right walk-through detector for your terminal’s needs and passenger volume. Explore our lineup of walk-through metal detectors, including the PD 6500i, or contact our team directly for a quote.