Radiacode 102
The cheapest way to get a pocket gamma spectrometer with a polished phone app. A great everyday detector for collectors and travellers.
Amazon $249$249
The Radiacode 102 is the better geiger counter overall, rated 3.7 to 2.3. The Radiacode 102 leads on features and radiation types. The AKSTEST HFS-50-CsI wins on dose-rate range and price. The AKSTEST HFS-50-CsI costs $99.01 less ($149.99 vs $249).
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.
AKSTEST HFS-50-CsI
A low-cost scintillation dosimeter for general monitoring. Too little is published to rank it with the Radiacodes.
Amazon $149.99$149.99
Which should you buy?
- Choose the Radiacode 102 for features (data logging, phone or cloud connection, gamma spectrum vs none of the listed features) and radiation types (gamma, X-ray, beta vs gamma, X-ray).
- Choose the AKSTEST HFS-50-CsI for dose-rate range (reads up to 20,000 µSv/h vs reads up to 1,000 µSv/h) and price ($149.99 vs $249).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every scintillation and solid-state geiger counter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Radiacode 102 | AKSTEST HFS-50-CsI |
|---|---|---|
| Overall rating | 3.7/5 | 2.3/5 |
| Sensitivity 25% | 78 1,800 CPM per µSv/h (Cs-137) | 0 sensitivity not published, scored as lowest |
| Radiation types 20% | 40 gamma, X-ray, beta | 0 gamma, X-ray |
| Dose-rate range 15% | 33 reads up to 1,000 µSv/h | 77 reads up to 20,000 µSv/h |
| Features 15% | 100 data logging, phone or cloud connection, gamma spectrum | 0 none of the listed features |
| Price 15% | 49 $249 | 67 $149.99 |
| Warranty 10% | 67 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Radiacode 102 | AKSTEST HFS-50-CsI | |
|---|---|---|
| Detection | ||
| Detector | Scintillator | Scintillator |
| Tube or crystal | CsI(Tl) crystal | CsI scintillator |
| Radiation types | β γ X | γ X |
| Sensitivity | 1,800 CPM per µSv/h (Cs-137) | - |
| Max dose rate | 1,000 µSv/h | 20,000 µSv/h |
| Gamma spectrum | Yes | No |
| Energy resolution (662 keV) | 9.5 % | - |
| Features | ||
| Data logging | Yes | No |
| Connection | Bluetooth | None |
| Battery | 1000 mAh rechargeable | 2000 mAh rechargeable, USB-C |
| Battery life | 200 h | 1,700 h |
| Build | ||
| Weight | 65 g | - |
| Warranty | 2 years | - |