KEY TAKEAWAY: Your CGM can go through airport security in Australia — but how straightforward that is depends entirely on which device you're wearing. Metal detectors are fine for virtually every sensor on the market. Full-body scanners are where it gets device-specific, and the manufacturers don't all agree.
The non-negotiable, regardless of your CGM: tell the screening officer you're wearing a medical device before you get anywhere near a scanner, and know that you can always ask for a pat-down instead.
Australia has one of the highest rates of type 1 diabetes in the world. We also have some of the longest domestic flight routes on the planet — Darwin to Melbourne, Perth to Sydney, Cairns to Adelaide — and that's before you factor in the international legs that many Aussies take regularly.
For Australian travellers managing diabetes with a CGM, navigating airport security is simply part of the travel routine.
And yet clear, device-specific guidance on how to actually handle the security queue is genuinely hard to come by. Ask at the gate and you'll get a shrug. Google it and you'll find mostly American articles referencing the TSA, which doesn't apply here.
The official advice from manufacturers exists, but it takes some digging — and it differs depending on whether you're wearing a Dexcom, a FreeStyle Libre, or a Medtronic system.
This guide pulls together what the manufacturers actually say and what rules apply at Australian airports.
👉 Wearing an insulin pump as well? That adds another layer. Our guide on Insulin Pumps at Australian Airport Security covers the Omnipod DASH, Omnipod 5, Medtronic MiniMed, Tandem, and what each manufacturer says about getting through the checkpoint.
First, a Word on How Australian Airport Security Actually Works
This isn't the TSA. In Australia, airport security screening operates under the Aviation Transport Security Act 2004, with the Department of Home Affairs setting the standards and contracted security providers running the checkpoints. The Australian Border Force handles customs and border control separately — what you encounter at the domestic or international security lane is a different operation.
For passengers with medical devices, the screening framework is reasonable: you're entitled to disclose your device before screening, and you can request an alternative to any scanner. In practice, that means hand-wanding or a physical pat-down. You don't need to justify the request beyond saying you're wearing a medical device.
What's worth knowing is that Australian airports — particularly the major hubs — have deployed full-body scanners broadly across both domestic and international terminals. If you're departing from Sydney (SYD), Melbourne (MEL), Brisbane (BNE), Perth (PER), or Adelaide (ADL), there's a very good chance you'll encounter one. Knowing how your specific CGM interacts with that equipment before you're standing in the queue is genuinely useful.
Diabetes Australia recommends travelling with a diabetes travel letter from your GP or endocrinologist. Not because it's required for a domestic Jetstar flight from Tullamarine — but because it makes conversations at international checkpoints significantly easier, and it helps when you're connecting through airports where staff may be less familiar with CGM technology.
What the Airport Scanners Actually Do to Your CGM
Before getting into the device-by-device breakdown, it helps to understand why the scanner question matters at all.
Walk-through metal detectors use a low-frequency electromagnetic field to detect metal. CGM sensors contain minimal metal components, and the consensus across manufacturers is that metal detectors pose no risk to any major CGM currently on the Australian market.
Full-body scanners are different. Most Australian airports use millimeter wave technology — a form of radio-wave scanning that creates a 3D image of the body's surface. It's this technology that some CGM manufacturers flag as potentially problematic, not because of radiation risk to the person, but because of the potential effect on the sensor's electronics or adhesive components.
X-ray baggage belts work differently again — and most manufacturers advise keeping sensors, transmitters, and receivers out of them entirely.
Understanding this distinction is what makes the device-specific guidance below make sense.
Dexcom G7 — Good News at the Airport Checkpoint
If you're on the Dexcom G7, airport security is about as uncomplicated as it gets for a CGM user.
Dexcom's official documentation confirms that G7 wearers can pass through both metal detectors and AIT full-body scanners without removing the sensor. Spare sensors in your carry-on can go through the X-ray baggage belt without any effect on performance. Hand-wanding and a pat-down are always available if you'd prefer them.
For Australian G7 users travelling internationally, Dexcom's Notice of Medical Device letter is worth downloading before departure — it's a clean, professional document that explains the device clearly and helps at checkpoints where English isn't the first language of the screening staff.
Summary for Dexcom G7:
- ✅ Metal detectors — safe
- ✅ Full-body AIT scanners — safe
- ✅ Carry-on X-ray — safe
- ✅ Hand-wanding and pat-down — always available
⚠️ Still on the G6? Dexcom's guidance for the G6 is more cautious — avoid AIT body scanners and request a pat-down or metal detector instead. The G7 rules don't carry back to the G6. If you've recently upgraded, your checkpoint approach changes for the better.
FreeStyle Libre 2, Libre 2 Plus, and Libre 3 — Know Before You Queue
The FreeStyle Libre range has a significant user base in Australia, including many people accessing it through the NDSS CGM subsidy program. If you're one of them, Abbott's security guidance is worth understanding clearly — because it requires a bit more awareness at the checkpoint than the G7 does.
The good news: FreeStyle Libre sensors handle standard metal detectors without any issue.
The complication arises with millimeter wave full-body scanners. Abbott's position is that this scanner type hasn't been fully evaluated for FreeStyle Libre sensors, and that exposure may damage the device or affect reading accuracy. The recommendation is to avoid them and request an alternative screening method.
The tricky part in practice: scanner types at Australian airports aren't always labelled clearly from where you're standing in the queue. By the time you can see what's ahead, you're often already committed to that lane. The fix is simple — as soon as you reach the officer at the front of the lane, before anything else, let them know you're wearing a medical sensor and ask what type of scanner is in use. Most Australian screening staff handle this without hesitation. If there's any uncertainty about the scanner type, ask for hand-wanding or a pat-down. It adds two minutes to your morning. It's worth it.
Summary for FreeStyle Libre 2 and 3:
- ✅ Metal detectors — safe
- ⚠️ Full-body scanners — depends on scanner type; ask before you proceed
- ❌ Millimeter radio-wave scanners — do not go through; request alternative
- ✅ Hand-wanding and pat-down — always safe alternatives
Medtronic Guardian Sensor (with MiniMed 670G or 780G)
The Guardian sensor paired with a Medtronic pump system is the most involved of the three when it comes to airport security — not because the process is difficult, but because it requires the most proactive communication at the checkpoint.
Medtronic's official guidance is clear: the Guardian sensor and transmitter can pass through a standard metal detector safely. Full-body scanners are another matter — both the pump and the Guardian sensor and transmitter need to be removed before you go through one. Since removing a Guardian sensor mid-trip means ending your wear session, the pat-down isn't just the safer option — it's the only realistic one.
Medtronic provides an Airport Information Card for MiniMed users through Medtronic Australia's patient support. It's a concise document that explains both the pump and sensor to screening staff, and it's worth having saved on your phone before you travel.
Summary for Medtronic Guardian:
- ✅ Metal detectors — safe
- ❌ Full-body scanners — do not go through; request pat-down
- ❌ X-ray baggage belt — avoid
- ✅ Hand-wanding and pat-down — the recommended approach
👉 Flying with diabetes involves more than just the CGM. From insulin and syringes to hypo snacks and glucose metres, there's quite a bit to think about before you reach the checkpoint. Our guide on Airport Security Rules for Diabetic Travellers in Australia covers the full picture — so there are no surprises on the day.
From the security queue to your final destination — keep your insulin at the right temperature with 4AllFamily's travel insulin coolers, designed for Australian domestic and international travel.
If You're Wearing a Pump and a CGM at the Same Time
Closed-loop and hybrid closed-loop systems are becoming increasingly common in Australia, particularly since expanded NDSS funding has made pump and sensor combinations more accessible. If you're running one of these systems, you're managing two sets of manufacturer rules every time you go through security.
The practical approach is straightforward: treat the pump and sensor as a single system, apply the most conservative rule that applies to either, and request a pat-down that covers both at once. Tell the officer about both devices before screening begins — don't wait until the pump triggers the metal detector and you're trying to explain things on the fly.
What to Actually Say at the Airport Security Lane
The checkpoint conversation is almost always easier than people expect. A simple, direct approach works every time:
"Hi — I'm wearing a continuous glucose monitor and an insulin pump. They're medical devices that can't go through the body scanner. Can I have a pat-down instead, please?"
Done. Most Australian screening staff respond immediately and redirect you without any fuss. On the rare occasion someone is less familiar with CGMs, your manufacturer's letter or GP note resolves it.
Practical tips that make the experience smoother:
- Get in early. Don't wait until you're at the scanner to say something. Flag it to the officer directing passengers to the screening lane before you're committed to a queue.
- Travel with a letter. A brief note from your GP or endocrinologist confirming your diagnosis, your CGM, your pump, and any medications — including insulin — is worth carrying. Diabetes Australia and the NDSS both recommend it, and it's particularly useful on international routes through Southeast Asia, the Pacific, or Europe where staff may be less familiar with Australian CGM technology.
- Spare sensors go in your carry-on. Always. Checked luggage gets delayed, lost, and left on the tarmac in circumstances you can't predict. Don't let your backup sensors be in a bag you're not holding.
- Save your manufacturer's documentation offline. Airport WiFi is unreliable. Download Dexcom's Notice of Medical Device or Medtronic's Airport Information Card before you leave home, not while you're standing at the checkpoint.
- Pat-downs are your right — use them. No explanation beyond "I'd prefer a pat-down" is required. Ever.
👉 Travelling from Australia often means long-haul flights, stopovers in humid climates, and accommodation where the fridge may or may not be working. My guide on How to Keep Insulin Cool When Travelling covers what actually works on the road — because your insulin's safe temperature range doesn't care how long your flight is.
FAQs About CGMs at The Airport
Can I wear my CGM through airport security in Australia?
Yes. All major CGM sensors can pass through walk-through metal detectors at Australian airports without issue. Full-body scanners are where the rules differ by device — the Dexcom G7 is cleared for AIT scanners, while FreeStyle Libre and Medtronic Guardian users should avoid certain scanner types. When in doubt, ask for a pat-down.
Do I need a letter from my doctor to fly with a CGM?
Not for domestic flights within Australia — but Diabetes Australia and the NDSS both recommend carrying one, especially if you're also travelling with insulin, syringes, or other supplies. For international travel it becomes more important, particularly when connecting through airports where English is not the primary working language.
Can I be asked to remove my CGM sensor at the checkpoint?
No — and if you are, you can decline. CGM sensors sit under the skin and cannot be removed without ending the wear session entirely. Request a pat-down instead. If a screening officer is insisting, ask for a supervisor.
What about flying between states domestically?
The same rules apply regardless of whether you're flying Sydney to Brisbane or Perth to Darwin. All Australian domestic security checkpoints operate under the same framework, and your manufacturer's guidance applies everywhere.
Is my NDSS CGM supply covered if I travel overseas?
The NDSS subsidy applies to supplies purchased in Australia before you depart. If you're travelling internationally, stock up before you leave and carry enough supplies for your full trip plus a buffer.
What if I'm flying through an Asian hub on the way to Europe or the Americas?
Security screening procedures vary by country and airport. The manufacturer guidance for your CGM still applies, but how familiar staff are with CGM technology varies considerably. This is where a GP letter — ideally with a brief translation if you're transiting through a non-English-speaking country — becomes genuinely useful rather than just a nice-to-have.
💬 We'd Love To Hear From YOU!
Where have you flown with your CGM, and how did Australian airport security handle it?
Drop your experience in the comments — the more we share as a community, the better prepared every Australian diabetic traveller can be.
