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
The Mazur PRM-9000 is the better geiger counter overall, rated 3.1 to 2.6. The Mazur PRM-9000 leads on sensitivity, features and dose-rate range. The Mazur PRM-9000 costs $191.76 less ($699 vs $890.76).
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.
Radiation Alert Monitor 4EC
An analog survey meter for people who prefer a needle to a number. It costs a lot for what it measures.
Amazon $890.76$890.76
Which should you buy?
- Choose the Mazur PRM-9000 for sensitivity (350 CPM per µSv/h (Cs-137) vs 100 CPM per µSv/h), features (data logging vs none of the listed features) and dose-rate range (reads up to 1,250 µSv/h vs reads up to 500 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 | Mazur PRM-9000 | Radiation Alert Monitor 4EC |
|---|---|---|
| Overall rating | 3.1/5 | 2.6/5 |
| Sensitivity 25% | 42 350 CPM per µSv/h (Cs-137) | 15 100 CPM per µSv/h |
| Radiation types 20% | 100 gamma, X-ray, beta, alpha | 100 gamma, X-ray, beta, alpha |
| Dose-rate range 15% | 37 reads up to 1,250 µSv/h | 23 reads up to 500 µSv/h |
| Features 15% | 35 data logging | 0 none of the listed features |
| Price 15% | 13 $699 | 4 $890.76 |
| Warranty 10% | 33 1-year warranty | 33 1-year warranty |
Specifications
| Mazur PRM-9000 | Radiation Alert Monitor 4EC | |
|---|---|---|
| Detection | ||
| Detector | Mica window GM tube | Mica window GM tube |
| Tube or crystal | LND 7317 pancake | energy-compensated GM tube with mica window |
| Radiation types | α β γ X | α β γ X |
| Sensitivity | 350 CPM per µSv/h (Cs-137) | 100 CPM per µSv/h |
| Max dose rate | 1,250 µSv/h | 500 µSv/h |
| Energy range | from 10 keV | from 10 keV |
| Gamma spectrum | No | No |
| Features | ||
| Data logging | Yes | No |
| Connection | None | None |
| Battery | 9 V | 9 V |
| Battery life | 42,850 h | 2,000 h |
| Build | ||
| Weight | 368 g | 231 g |
| Warranty | 1 year | 1 year |