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Cutting-Edge Hardware Engineered with Advanced Components
Game-Changing Detection Speed
Radiacode is a next-generation Geiger counter that reimagines how you detect nuclear radiation. A semiconductor scintillation crystal teamed with a high-speed ARM Cortex-M4 processor delivers a natural-background rate of 300–500 CPM—more than twenty times the sensitivity of a conventional Geiger-Müller tube.
That extra sensitivity matters when you’re on the move: you can walk at a normal pace and are up to twenty times less likely to miss a radioactive hotspot.
Every unit is temperature-calibrated from –4 °F to 122 °F, so whether you’re sweeping a sun-baked field or crunching across winter snow, your readings stay rock-solid.
Software
Radiacode provides powerful, free mobile apps for all popular platforms, giving you access to advanced features for working with the device:
- Scalable dose-rate and CPS graphs
- Advanced spectrum visualization
- Radiation GPS tracking
- Search Mode
- Spectrogram
- Event logs
- Food and substance testing for Cs-137 (Available now for Android. iOS coming soon.)
The device pairs with your phone via Bluetooth and works with data in real time.
Nuclear Isotope Visualization
Gamma spectrometry — once the domain of bulky lab rigs costing tens of thousands of dollars — now fits in your pocket.
Paired with a free smartphone app, the 67-gram Radiacode lets you visualize the energy lines of incoming γ-rays and explore natural sources like uranium-238, cesium-137, radium-226, thorium-232, and more.
It opens a window into the fascinating world of nuclear science — for hobbyists, students, educators, and curious minds.
Examine your environment, test rock samples, collect antiques, study soil, share spectra in our online community — and make discoveries of your own.
And most importantly: no ordinary Geiger counter can do this.
Radiation Mapping
Pair Radiacode with your phone over Bluetooth and watch a live radiation layer grow on Google Maps or OpenStreetMap.
The detector logs the exact GPS coordinates, dose rate, and CPS at the interval you set, then paints your path in color—fiery reds for hot spots, yellow for caution, cool blues and greens for background. Think of it as a traffic-light overlay for ionizing radiation, complete with customizable palettes.
Export your tracks, import those from other Radiacode users, and build a shared atlas of the unseen. With this “sixth sense” switched on, hidden anomalies and safe havens leap off the map.
Food Activity Test
Radiacode’s dedicated Cs-137 mode turns your detector into a pocket food lab. Fallout from Cold War weapons tests and accidents like Chernobyl has scattered this man-made isotope across every continent—from Africa’s savannas to Antarctica’s ice sheets. Because the human body mistakes Cs-137 for potassium, it accumulates in muscle, heart, and liver for decades.
With Radiacode you can scan food and other substances and detect even minute traces of cesium-137. The half-life of cesium-137 is more than 30 years, so this problem will remain relevant for well over a century.
Available now for Android. iOS coming soon.
Spectrogram Functionality
Radiacode’s spectrogram mode builds a rolling time-lapse of gamma spectra—thousands of color-coded slices captured automatically at the interval you set, no extra taps required. When your alarm suddenly fires and then falls silent, the spectrogram is your after-action replay. It logs the brief spike, so later you can scroll back and see exactly what passed by.
A quick look might reveal the tell-tale signature of technetium-99m from a patient who just had radioisotope therapy or contrast imaging: a momentary burst, then a clean background. Instead of guessing why the detector chirped, you have hard evidence and peace of mind.
Advanced Search Mode
When every second counts, switch on Advanced Search and work at top speed. In this mode, events are processed instantly—no averaging—much like a metal detector, so you can zero in on pinpoint sources in record time.
Directional audio sent to your phone or earbuds keeps you updated even in noisy or covert situations, while an on-screen analog bar stays in your peripheral vision, eliminating the need to stare at the display. A live graph highlights rising trends, and the re-engineered algorithm slashes response lag, giving you split-second feedback.
Scott R.
Reviewed in the United States on February 20, 2025
I purchased this after having one on order with the manufacturer for over a month on backorder. This delivered in three days and of course, the one from Cyprus landed a couple days later. While there has to be a lot under the hood, the main thing that impresses me hardware-wise is that it is not a run of the mill Geiger counter. It uses a GAGG(Ce) scintillator coupled with a photomultiplier tube. This is pretty next-generation technology!While impressive in its own right, the power of the device is brought forth with the software that is available for smartphones and desktop computers. That's where the big time analysis and pretty pictures can be found! You do get rudimentary activity/dose rate/dose information and (I believe) some background spectra analysis (haven't figured this out yet).Inside the box you have the detector and a USB-A to USB-C cable. There are a couple cards with basic safety information and a QR code to scan to get the software. The QR code doesn't work (as of 2/15/25) so it's just as easy searching for it through wherever you get your phone software. I highly recommend getting a case for it as well. Not only does it make it easier to travel with it, but it adds a layer of protection to your somewhat less cheap new toy. I picked up the EVA hard case with the one I got off Amazon and a silicone skin for the one I got from the manufacturer. Obviously the hard case will be more protective but the skin allows for quick use. I actually have it clipped to the carabiner on the backpack I take to work.This is ORDERS OF MAGNITUDE MORE sensitive and accurate than the "yellow box" Geiger counter made in China that you can pick up here and just about everywhere else. If you want something to look at everyday things, the Radiacode would be my recommendation. If you're serious about radiation detection, you need to put on your Big Boy Pants and get a Ludlum Model 3 or similar. But now we're talking (at least) an order of magnitude higher cost.
Jesús Almándoz Luquin
Reviewed in Spain on February 12, 2025
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Dmitry Spiridonov
Reviewed in Canada on August 30, 2024
Cool gadget that's fun to use, really well designed and surprisingly handy!
Héctor Daniel Cortés González
Reviewed in Mexico on August 15, 2024
Radiacode 102 -- he detectado K-40, Lu-176, y por supuesto, la aleación W-Th (WT-20)Excelente.
Ghost
Reviewed in the United States on June 18, 2024
* Photos are of a spectrum using my Radiacode 103 inside a homemade lead castle, reducing background radiation by about 90%. After testing a raw tuna sample from Japan for 9 hours, no Cesium 137 is detected!The Radiacode 103 is an excellent scintillation detector. It's well-built, affordable, very sensitive, and versatile. It can be used as a dosimeter to measure both dose rate and total dose accumulation. But what really sets it apart from normal geiger counters is the fact that it can be used to identify what radioactive isotopes you are detecting. The app is extremely well designed and useful. It even includes a feature that allows you to automatically calculate how many becquerels of gamma radiation a food sample you are testing has. Unless you need an instrument that can detect alpha and beta radiation, I strongly recommend getting the Radiacode 103 over the GQ-GMC 600. Both are about the same price, but the Radiacode 103 build quality and components are MUCH better, plus it's a much more versatile instrument.Finally, keep in mind that if you are looking for a survival radiation detector, none sold on Amazon are capable of detecting very high levels of radiation that you would most likely encounter during a nuclear war. For that purpose, I recommend either the Ecotest DKG-21 or DKG-21M detectors. They are able to accurately measure gamma radiation dose rates accurately up to 1 Sievert/hour (1,000,000 microsieverts/hour). Very few new gamma radiation detectors available on the market today are able to accurately measure levels this high. Both detectors are made in Ukraine and the build quality is excellent.
Terry Lawrence
Reviewed in Canada on March 1, 2024
This unit is the one to buy if you are a "Cry Once" type of shopper. You will not need to buy the cheaper/simpler ones to finally realize that this is the one for 99% of your nuclear exploring.The Android app is spectacular and feature packed. The rechargeable battery life is excellent ( over 180 hours ). It is one of my everyday carry items which makes seeing my daily exposure statistics simple and very cool. i am not an Apple guy, but I hear that the iphone app is getting close to release.The manufacturer is exemplary in support and the quality of the device is excellent. Ordering and shipping was painless and very fast. From Cyprus to my hands in 4 days!
Mr. Yikes
Reviewed in the United States on February 12, 2024
This is an interesting device. I've had a bit of time to tinker with it and have taken it out in the field. It's not a geiger counter. A geiger counter uses a geiger-mueller tube. A typical thin-walled geiger tube can only really register beta and pick up that there is radiation present, not its energy. It's basically numbers of clicks of ionizing radiation without being able to tell you anything about it. This is a scintillator that mostly picks up gamma and tracks voltage of counts in kev. It tracks these counts in spectra, spectrograms over time, and location. It's not quite a lab-grade device, but it puts this sort of monitoring and tracking into an affordable device. It's the kind of device you can carry with you and track radiation levels and doses around your location. You can put it next to an emitter, take a spectrum and identify the type of emitter. If you have an alpha or beta source, like uranium or thorium, it doesn't necessarily read it directly, but records the gamma emissions of decay chain products to identify the source. It's very sensitive to these types of sources in a way that a cheaper geiger tube device usually isn't. I think that the intended "killer ap" would be using it to monitor food sources down wind of Chernobyl. It's a European product in that way. That's not as much of a concern for me. For me, it can be a bit of a toy where I can take spectra of common emitters, like uranium glass, vintage dishes, lantern mantles. I've figured out that my downtown areas is slightly more radioactive than where I live. However, it's not a toy. It's a pretty serious device. There's a feature in the app that lets you identify emitter types through the differing peaks on a spectrum. You can take a baseline background reading and subtract it from your spectra to really make the source type more clear. It really does do a lot for the money. I use it as a safety device when I replace smoke detectors for people. I can check them for radiation emitters before disposing of them so i don't expose myself and others. As well, I run a desert education group and it helps in identifying minerals in the field. I found out one of my camera lenses is a beta emitter (thorium glass) which doesn't change much, but I'm happy that I know not to carry it in my vest pocket for 12 hours a day.My heads up is that the Android app is much more mature than the iOS app. The iPhone app is missing a lot of features, but it seems like they are updating about once a month. As of February 2024, the tracks feature works and the radiation level and dose rate features are working. You can take spectra but can't save them yet. I hope this gets fixed quickly, since this is maybe the best feature for me. The android app has pretty modest requirements, so I borrowed an old Android phone to save spectra and do background subtraction until these features are added. I don't think this is a deal killer. Also, the Android app has some odd English locutions so it might take some time to figure out what these features are, and you might need to refer to the documentation a few times before getting comfortable. So far, the iOS app is much more intuitive, though it is a work in progress.
Osvaldo Palmas
Reviewed in Spain on December 27, 2024
Muito bom!
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