GQ GMC-800
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$85.98
GM tube132 CPM/µSv/h2,000 µSv/h
2.6/5
A long-running data-logging Geiger counter for steady background monitoring at a desk. The GMC-800 costs about the same and publishes more.
- GM tubeDetector
- β γ XDetects
- 328 µSv/hMax dose rate
Check price at Amazon$97
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Large memory logs weeks of readings for later download
- Reads beta, gamma and X-rays
- One-year warranty is spelled out
Cons
- The user guide does not publish its sensitivity, so it scores lowest on that factor
- Saturates around 328 µSv/h
- It is unclear whether units ship with the Wi-Fi revision
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its detector type. How we rank explains each one.
Specifications
| Model number | GMC-320 Plus |
|---|---|
| Detection | |
| Detector | GM tube |
| Radiation types | β γ X |
| Max dose rate | 328 µSv/h |
| Energy range | 100 to 3,000 keV |
| Gamma spectrum | No |
| Features | |
| Data logging | Yes |
| Connection | None |
| Battery | 3.7 V rechargeable Li-ion |
| Build | |
| Warranty | 1 year |
Alternatives in this detector type
GQ GMC-300S
A basic, cheap beta-gamma counter for checking background levels and hobby samples. Buy it to learn, not for emergencies.
Amazon $55.98$55.98
GM tube132 CPM/µSv/h328 µSv/h
FNIRSI GC-03
A cheap combined radiation and EMF meter for casual checks around the house. It is not a precise radiation instrument.
Amazon $79.99$79.99
GM tube80 CPM/µSv/h
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