---
product_id: 500238286
title: "FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched"
brand: "fnirsi"
price: "$8.36"
currency: USD
in_stock: false
reviews_count: 11
url: https://www.desertcart.us/products/500238286-fnirsi-geiger-counter-nuclear-radiation-detector-radiation-dosimeter-with-lcd
store_origin: US
region: United States of America
---

# Detects Gamma, Beta & X-rays Rechargeable battery-powered 3-mode smart alarm system FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched

**Brand:** fnirsi
**Price:** $8.36
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Stay ahead of invisible threats with FNIRSI’s cutting-edge radiation guardian!

## Quick Answers

- **What is this?** FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched by fnirsi
- **How much does it cost?** $8.36 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/500238286-fnirsi-geiger-counter-nuclear-radiation-detector-radiation-dosimeter-with-lcd)

## Best For

- fnirsi enthusiasts

## Why This Product

- Trusted fnirsi brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Dosage Units:** Switch effortlessly between 5 dosage units to match your specific measurement needs and industry standards.
- • **Portable & User-Friendly:** Compact handheld design with easy one-handed operation and multilingual support (English/Chinese) for on-the-go professionals.
- • **Customizable Smart Alerts:** Set your preferred dose thresholds with light, vibration, and sound alarms to stay instantly informed, even in sleep mode.
- • **Broad Application Spectrum:** Ideal for home safety, industrial inspections, radiology labs, and environmental surveys—because your peace of mind deserves professional-grade tools.
- • **Precision Radiation Detection:** Built-in GM sensor captures Gamma, Beta, and X-ray radiation with a wide energy range (48 KeV-1.5 MeV) for reliable safety monitoring.

## Overview

The FNIRSI GC-01 Geiger Counter is a compact, rechargeable radiation detector equipped with a built-in GM sensor that accurately measures Gamma, Beta, and X-ray radiation across a broad energy range. Featuring customizable alarms with light, vibration, and sound modes, it ensures real-time alerts for radiation exposure. Designed for professionals and safety-conscious users, it supports multiple dosage units and languages, making it perfect for diverse environments from home safety to industrial and medical applications.

## Description

Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched,0.0μSv-500mSv

Review: Detection - Very effective. My cat underwent radioactive iodine treatment, and I needed to protect myself. It's accurate and quick to detect. All my cat had to do was walk by or stand for any period of time. period of time.
Review: Good for the price. - I was fortunate enough to get the original legit version. Features the J321 GM Tube. Detects the radiation in my smoke detector VERY well when firmware upgraded (Americium-241 Alpha, It's not designed to detect Alpha reliably... but upgraded definitely lets you know of it's presence) . Stock product does not have clicks. If you get the original version, it's good for the little money you pay. Upgraded mine with custom firmware and now got clicks and higher detection rate.

## Features

- 【Nuclear Radiation Detector】FNIRSI GC-01 Geiger counter nuclear radiation detector with built-in GM sensor, able to detect Gamma, Beta and X-rays. Cumulative dose equivalent: 0.00 uSv-500.0 mSv. Energy range: 48 KeV-1.5 MeV ≤ plus/minus 30%（for 137 Csγ)
- 【Smart Alarm】3 modes of Light/Vibration/Sound. Geiger counter can set current dose alarm value and cumulative dose alarm value. Whether in sleep or active state, the radiation monitor will alarm if the detected radiation dose exceeds the alarm threshold
- 【Multifunctional Geiger Counter】Our the geiger counter has other various setting, such as alarm setting, system clock setting and unit setting & language change,you can operate in English (default) or Chinese. Easy one-handed operation
- 【Working Principle】FNIRSI GC-01 radiation meter uses a trachea or small room as a probe to detect ionizing radiation gamma/Beta/X-ray. Radiation ionization generates ion pairs, ions are enlarged and converted into electrical pulse counts to measure
- 【Application Areas】Widely applied in the environment where existing ionize radiation. Such as home improvement radiation, geological survey, iron, Inspection vehicles, nuclear power plants, industry, radiology, radiology laboratories and so on

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BHH9X1WG |
| Best Sellers Rank | 289,419 in DIY & Tools ( See Top 100 in DIY & Tools ) 678 in Multi Testers |
| Brand | FNIRSI |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,323) |
| Included Components | Nuclear radiation detector |
| Item Dimensions | 12.7 x 5.1 x 2.5 centimetres |
| Item Weight | 200 Grams |
| Manufacturer | FNIRSI-GC-01 |
| Manufacturer Part Number | GC-01 |
| Material | Iron |
| Model Number | GC-01 |
| Style Name | Compact |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** FNIRSI
- **Item dimensions L x W x H:** 12.7 x 5.1 x 2.5 centimetres
- **Item weight:** 200 Grams
- **Material:** Iron
- **Style:** Compact

## Images

![FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched - Image 1](https://m.media-amazon.com/images/I/613MADyzBsL.jpg)
![FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched - Image 2](https://m.media-amazon.com/images/I/71oVVm0Z4QL.jpg)
![FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched - Image 3](https://m.media-amazon.com/images/I/71FmyDYzEHL.jpg)
![FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched - Image 4](https://m.media-amazon.com/images/I/81B0K52XsGL.jpg)
![FNIRSI Geiger Counter Nuclear Radiation Detector - Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched - Image 5](https://m.media-amazon.com/images/I/71RLF51cyyL.jpg)

## Questions & Answers

**Q: The device won't power on.**
A: 1.Press the power button briefly, avoid long presses. 2.Use the reset button at the device's bottom. 3.Connect to a computer for firmware update.

**Q: Readings are inaccurate.**
A: 1.Ensure the unit is set to μSv/h, the standard for normal areas.  2.Charge the device if the battery voltage is low.  3.Keep away from strong electromagnetic devices during measurement.

**Q: The device fails to detect radiation.**
A: Conduct a function test: hold a test source close to the detector and check if the reading increases. Update the firmware if software freeze causes data lock.

**Q: How do I switch languages?**
A: Long-press the right button to enter settings, navigate to "Language" with the down button, select English, and confirm with the OK button.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Detection
*by A***R on 17 September 2025*

Very effective. My cat underwent radioactive iodine treatment, and I needed to protect myself. It's accurate and quick to detect. All my cat had to do was walk by or stand for any period of time. period of time.

### ⭐⭐⭐⭐ Good for the price.
*by B***B on 13 January 2025*

I was fortunate enough to get the original legit version. Features the J321 GM Tube. Detects the radiation in my smoke detector VERY well when firmware upgraded (Americium-241 Alpha, It's not designed to detect Alpha reliably... but upgraded definitely lets you know of it's presence) . Stock product does not have clicks. If you get the original version, it's good for the little money you pay. Upgraded mine with custom firmware and now got clicks and higher detection rate.

### ⭐⭐⭐ Item is ok but room for improvement
*by D***N on 4 September 2025*

Item is ok. Improvements can be made so a sound go off alerting if getting close to dangerous conditions. As this item remains silent.

## Frequently Bought Together

- Geiger Counter Nuclear Radiation Detector - FNIRSI Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched
- Khanka Carrying Case for Geiger Counter Nuclear Radiation Detector - FNIRSI Radiation Dosimeter with LCD Display,Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter(Case Only).
- Potassium Iodide Radiation Tablets 130 mg (2 Pack) - (280 Tablets) EXP 10/2032 - Potassium Iodine Pills YODO Naciente, Anti Nuclear Fallout Pills

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/500238286-fnirsi-geiger-counter-nuclear-radiation-detector-radiation-dosimeter-with-lcd](https://www.desertcart.us/products/500238286-fnirsi-geiger-counter-nuclear-radiation-detector-radiation-dosimeter-with-lcd)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-22*