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
The GQ GMC-600 Pro rates 3.4 among alpha-beta-gamma counters geiger counters; the Radiacode Zero rates 3.4 among scintillation and solid-state ones. The GQ GMC-600 Pro costs $1 less ($298 vs $299).
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.
Radiacode Zero
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$299
Scores side by side
These two sit in different detector type classes (alpha-beta-gamma counters and scintillation and solid-state), and each is scored against the reference points for its own class, so a rating says how well each does among its own detector type peers. How we rank explains each factor.
| Factor weight | GQ GMC-600 Pro | Radiacode Zero |
|---|---|---|
| Overall rating | 3.4/5 | 3.4/5 |
| Sensitivity 25% | 42 348 CPM per µSv/h (Co-60) | 64 960 CPM per µSv/h |
| Radiation types 20% | 100 gamma, X-ray, beta, alpha | 0 gamma, X-ray |
| Dose-rate range 15% | 54 reads up to 4,250 µSv/h | 100 reads up to 9,000,000 µSv/h |
| Features 15% | 70 data logging, phone or cloud connection | 70 data logging, phone or cloud connection |
| Price 15% | 43 $298 | 43 $299 |
| Warranty 10% | 0 warranty not published, scored as none | 67 2-year warranty |
Specifications
| GQ GMC-600 Pro | Radiacode Zero | |
|---|---|---|
| Detection | ||
| Detector | Mica window GM tube | Scintillator |
| Tube or crystal | LND 7317 pancake | organic plastic scintillator |
| Radiation types | α β γ X | γ X |
| Sensitivity | 348 CPM per µSv/h (Co-60) | 960 CPM per µSv/h |
| Max dose rate | 4,250 µSv/h | 9,000,000 µSv/h |
| Energy range | from 10 keV | 30 to 3,000 keV |
| Gamma spectrum | No | No |
| Features | ||
| Data logging | Yes | Yes |
| Connection | Wi-Fi | Bluetooth |
| Battery | 3.7 V rechargeable Li-ion | 1500 mAh rechargeable |
| Battery life | - | 200 h |
| Build | ||
| Weight | - | 76 g |
| Ingress rating | - | IP64 |
| Warranty | - | 2 years |
| Released | - | 2026 |