Radiacode 110
The best detector for finding and identifying weak sources, from uranium glass to contaminated finds. Pair it with a high-range meter if you want emergency coverage.
Amazon $399$399
Scintillator4,620 CPM/µSv/h400 µSv/h
A handheld radiation detector tells you how much ionizing radiation is around you, as a count rate and as a dose rate in µSv/h. People buy them to check background levels at home and on trips, to test rocks, uranium glass, old watch dials and antiques, and to keep in an emergency kit. These rankings cover detectors sold to individuals from GQ, Radiacode, Mazur, Radiation Alert, Medcom, Gamma-Scout, FNIRSI, Aranet and others. Radon monitors and fixed area monitors are left out.
The detector is the first choice, and the rankings are split by it. A sidewall Geiger-Müller tube is cheap and reads gamma, X-rays and most beta. A tube with a thin mica window, either a flat pancake or an end-window tube, also picks up alpha particles, which a sidewall tube can’t detect at all, so it is the tool for checking surfaces for contamination. A scintillation crystal or solid-state sensor reads gamma many times faster than a GM tube, and the best of them record an energy spectrum that tells you which isotope you are looking at.
Sensitivity is the second. It is the number of counts the detector registers for each µSv/h of dose rate. A detector that counts ten times faster settles on a reading ten times sooner and finds a weak source that a slower one walks past. Makers quote it for different calibration isotopes, so compare figures as a guide, not to the last count.
Range matters for emergencies. Many cheap counters stop reading at a few hundred µSv/h, which is plenty for hobby use and useless in a serious incident. If the detector is for an emergency kit, look for a top reading in the thousands of µSv/h or higher.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Top Picks
FNIRSI GC-01
A cheap pocket Geiger counter for a curious first look at background radiation. Serious users will want more sensitivity and logging.
Amazon $51.29$51.29
GM tube80 CPM/µSv/h
GQ GMC-600 Pro
The best value alpha-capable counter, with the same pancake tube as meters costing twice as much. A strong pick for checking surfaces, glass and minerals.
Amazon $298$298
Mica window GM tube348 CPM/µSv/h4,250 µSv/h
Shop by Detector Type
Beta-gamma Geiger counters
9 rankedGeiger counters with a sidewall GM tube that read gamma, X-rays and most beta, for checking background levels, food, rocks and antiques.
Top rated: GQ GMC-500+ $128
Alpha-beta-gamma counters
7 rankedCounters with a thin mica window, pancake or end-window tube, that also pick up alpha particles and low-energy beta for surface contamination checks.
Top rated: GQ GMC-600 Pro $298
Scintillation and solid-state
6 rankedGamma detectors with a scintillation crystal or a solid-state sensor, from pocket dosimeters to spectrometers that identify isotopes.
Top rated: Radiacode 110 $399
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Best Beta-Gamma Geiger Counters
- GQ GMC-500+#1 of 9Full review
The GQ to buy if you want a counter that keeps working at high dose rates. It suits emergency kits as well as everyday monitoring.
Amazon $128$128GM tube138 CPM/µSv/h42,500 µSv/h - GQ GMC-500#2 of 9Full review
A good value desk or window monitor that posts readings online over Wi-Fi. Pick the 500+ if you want readings at very high levels.
Amazon $118$118GM tube138 CPM/µSv/h4,250 µSv/h - MOESAPU FS-5000#3 of 9Full review
A cheap counter with a wide listed range for an emergency drawer. Its low sensitivity makes it a poor choice for checking samples.
Amazon $64.99$64.99GM tube60 CPM/µSv/h50,000 µSv/h - FNIRSI GC-01#4 of 9Full review
A cheap pocket Geiger counter for a curious first look at background radiation. Serious users will want more sensitivity and logging.
Amazon $51.29$51.29GM tube80 CPM/µSv/h- - GQ GMC-800#5 of 9Full review
A cheap, easy-to-read beta-gamma counter with a big screen and a lot of memory. Good for a first counter at home.
Amazon $85.98$85.98GM tube132 CPM/µSv/h2,000 µSv/h
Best Alpha-Beta-Gamma Geiger Counters
- GQ GMC-600 Pro#1 of 7Full review
The best value alpha-capable counter, with the same pancake tube as meters costing twice as much. A strong pick for checking surfaces, glass and minerals.
Amazon $298$298Mica window GM tube348 CPM/µSv/h4,250 µSv/h - Mazur PRM-9000#2 of 7Full review
A well-built pancake survey meter for contamination checks and collectors. It is good, but it is expensive for what the tube delivers.
Amazon $699$699Mica window GM tube350 CPM/µSv/h1,250 µSv/h - Radiation Alert Monitor 200#3 of 7Full review
A compact professional survey meter that reads all four radiation types. Hobbyists get more sensitivity for less with a pancake-tube counter.
Amazon $799.95$799.95Mica window GM tube107 CPM/µSv/h2,000 µSv/h - Medcom Inspector Alert V2#4 of 7Full review
A trusted professional pancake meter for contamination surveys. It is worth it if you need the name; the GQ GMC-600 Pro does most of the same for far less.
Amazon $960.40$960.40Mica window GM tube350 CPM/µSv/h1,100 µSv/h - Gamma-Scout Rechargeable#5 of 7Full review
A compact long-term logger for people who want months of readings. The missing sensitivity figure and high price hold it back.
Amazon $649$649Mica window GM tube-1,000 µSv/h
Best Scintillation Radiation Detectors
- Radiacode 110#1 of 6Full review
The best detector for finding and identifying weak sources, from uranium glass to contaminated finds. Pair it with a high-range meter if you want emergency coverage.
Amazon $399$399Scintillator4,620 CPM/µSv/h400 µSv/h - Radiacode 102#2 of 6Full review
The cheapest way to get a pocket gamma spectrometer with a polished phone app. A great everyday detector for collectors and travellers.
Amazon $249$249Scintillator1,800 CPM/µSv/h1,000 µSv/h - Radiacode 103#3 of 6Full review
The Radiacode for people who mainly want isotope identification in a pocket size. If you just want dose readings, the 102 is enough.
Amazon $319$319Scintillator1,800 CPM/µSv/h1,000 µSv/h - Radiacode Zero#4 of 6Full review
A sensitive pocket dosimeter that still works in a real emergency. Choose it over a spectrometer if dose readings matter more than isotope identification.
Amazon $299$299Scintillator960 CPM/µSv/h9,000,000 µSv/h - Aranet Radiation#5 of 6Full review
A set-and-forget home radiation monitor with a long battery life and a tidy app. It is not a tool for checking samples.
Amazon $139$139Solid-state sensor-1,000 µSv/h
How We Rank
Each detector is ranked against others with the same kind of detector, and scored on its sensitivity, the radiation types it detects, its dose-rate range, its logging, app and spectrum features, its price and its warranty.
| Factor | Measures | Weight |
|---|---|---|
| Sensitivity | published counts per minute for each µSv/h of dose rate | 25% |
| Radiation types | gamma and X-rays, plus beta and alpha | 20% |
| Dose-rate range | highest dose rate it can read | 15% |
| Features | data logging, phone or cloud connection, gamma spectrum | 15% |
| Price | checked price | 15% |
| Warranty | warranty length | 10% |
How we rank explains each factor in full.