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 3.0. The Mazur PRM-9000 leads on sensitivity. The Radiation Alert Monitor 200 wins on features. The Mazur PRM-9000 costs $100.95 less ($699 vs $799.95).
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 200
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$799.95
Which should you buy?
- Choose the Mazur PRM-9000 for sensitivity (350 CPM per µSv/h (Cs-137) vs 107 CPM per µSv/h).
- Choose the Radiation Alert Monitor 200 for features (data logging, phone or cloud connection (optional add-on) vs data logging).
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 200 |
|---|---|---|
| Overall rating | 3.1/5 | 3.0/5 |
| Sensitivity 25% | 42 350 CPM per µSv/h (Cs-137) | 17 107 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 | 43 reads up to 2,000 µSv/h |
| Features 15% | 35 data logging | 52 data logging, phone or cloud connection (optional add-on) |
| Price 15% | 13 $699 | 8 $799.95 |
| Warranty 10% | 33 1-year warranty | 33 1-year warranty |
Specifications
| Mazur PRM-9000 | Radiation Alert Monitor 200 | |
|---|---|---|
| Detection | ||
| Detector | Mica window GM tube | Mica window GM tube |
| Tube or crystal | LND 7317 pancake | mica end-window GM tube |
| Radiation types | α β γ X | α β γ X |
| Sensitivity | 350 CPM per µSv/h (Cs-137) | 107 CPM per µSv/h |
| Max dose rate | 1,250 µSv/h | 2,000 µSv/h |
| Energy range | from 10 keV | from 10 keV |
| Gamma spectrum | No | No |
| Features | ||
| Data logging | Yes | Yes |
| Connection | None | Optional add-on |
| Battery | 9 V | 2 x AA |
| Battery life | 42,850 h | 800 h |
| Build | ||
| Weight | 368 g | 181 g |
| Warranty | 1 year | 1 year |