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 is the better geiger counter overall, rated 3.4 to 3.1. The GQ GMC-600 Pro leads on features, price and dose-rate range. The GQ GMC-600 Pro costs $401 less ($298 vs $699).
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.
Mazur PRM-9000
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$699
Which should you buy?
- Choose the GQ GMC-600 Pro for features (data logging, phone or cloud connection vs data logging), price ($298 vs $699) and dose-rate range (reads up to 4,250 µSv/h vs reads up to 1,250 µSv/h).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every alpha-beta-gamma counters geiger counter; a clear win is highlighted. How we rank explains each one.
| Factor weight | GQ GMC-600 Pro | Mazur PRM-9000 |
|---|---|---|
| Overall rating | 3.4/5 | 3.1/5 |
| Sensitivity 25% | 42 348 CPM per µSv/h (Co-60) | 42 350 CPM per µSv/h (Cs-137) |
| Radiation types 20% | 100 gamma, X-ray, beta, alpha | 100 gamma, X-ray, beta, alpha |
| Dose-rate range 15% | 54 reads up to 4,250 µSv/h | 37 reads up to 1,250 µSv/h |
| Features 15% | 70 data logging, phone or cloud connection | 35 data logging |
| Price 15% | 43 $298 | 13 $699 |
| Warranty 10% | 0 warranty not published, scored as none | 33 1-year warranty |
Specifications
| GQ GMC-600 Pro | Mazur PRM-9000 | |
|---|---|---|
| Detection | ||
| Detector | Mica window GM tube | Mica window GM tube |
| Tube or crystal | LND 7317 pancake | LND 7317 pancake |
| Radiation types | α β γ X | α β γ X |
| Sensitivity | 348 CPM per µSv/h (Co-60) | 350 CPM per µSv/h (Cs-137) |
| Max dose rate | 4,250 µSv/h | 1,250 µSv/h |
| Energy range | from 10 keV | from 10 keV |
| Gamma spectrum | No | No |
| Features | ||
| Data logging | Yes | Yes |
| Connection | Wi-Fi | None |
| Battery | 3.7 V rechargeable Li-ion | 9 V |
| Battery life | - | 42,850 h |
| Build | ||
| Weight | - | 368 g |
| Warranty | - | 1 year |