---
product_id: 10065572
title: "GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment"
brand: "gq"
price: "70.40 OMR"
currency: OMR
in_stock: true
reviews_count: 10
category: "Gq"
url: https://www.desertcart.com.om/products/10065572-gq-gmc-320plus-fulfill-nuclear-radiation-detector-meter-test-equipment
store_origin: OM
region: Oman
---

# 16MB Flash memory for extensive data logging Real-time graphing & playback on PC Rechargeable battery with USB & car adapter charging GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment

**Brand:** gq
**Price:** 70.40 OMR
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay ahead of invisible threats with real-time radiation insights!

## Quick Answers

- **What is this?** GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment by gq
- **How much does it cost?** 70.40 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/10065572-gq-gmc-320plus-fulfill-nuclear-radiation-detector-meter-test-equipment)

## Best For

- gq enthusiasts

## Why This Product

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

## Key Features

- • **Advanced Sensor Suite:** Includes temperature sensor and electronic gyroscope for precise environmental context.
- • **Portable & User-Friendly:** Compact design with LCD contrast control, LED indicators, and audible alerts for on-the-go professionals.
- • **Reliable Power Solutions:** Recharge via USB or car adapter ensuring no data loss during extended fieldwork.
- • **Seamless Data Integration:** Open communication protocol enables easy connection to radiation networks and software.
- • **Continuous Radiation Monitoring:** Logs radiation counts every second for up to two weeks without interruption.

## Overview

The GQ GMC-320Plus is a US-made digital Geiger counter designed for professionals needing precise, continuous radiation monitoring. Featuring 16MB internal flash memory, real-time graphing, and playback capabilities, it supports seamless data logging and analysis via PC. Its rechargeable battery system with USB and car adapter charging ensures uninterrupted field use, while built-in sensors and open protocols make it ideal for labs, environmental studies, and industrial applications.

## Description

The GQ gmc-320-plus digital Geiger counter is the latest GMC-320Plus Fulfill developed by GQ electronics LLC, USA. as an enhanced version of gmc-300e Plus, it has larger internal Flash memory to facilitate data processing capability. It also has temperature sensor & electronic gyroscope, LCD contrast control, front LED indicator, analog data port output, new graphic Type. this product can be used for industrial, commercial or Test equipment, such as universities, laboratories, environment evaluation measurement, hospital research, scientific analytical applications, antique evaluation, building material testing research and so on. comparing to other brand products, the most prominent advantages of this product are: having most features and cost effective. It also has unique features, such as, record data first play it back later; open protocol for easy application integration; visualize real-time graph, data logging. portable and convenient with built-in audible and visual signals, it features automatic data recording. It is able to continually monitor the radiation and log the data each second into internal memory. When connected to a PC, GQ software can download the radiation history data to the computer and the user is able to analyze those data later. The device uses USB port for communication and power. The internal battery can be charged via wall adapter or car adapter. Using the adapters, continuous data monitoring is possible and no worry about batteries charge or any data loss. The main board has a real time clock for time related data logging purposes. the USB port communicates with GQ gmc-320 Plus soft Geiger counter software and GQ Geiger counter data viewer software. For professional data logging, an more advanced version, may be purchased at low cost from gq. .

Review: Excellent device for the price. Only drawback is fairly low sensitivity. - This is a very good Geiger counter for the price. I've been using it for some at-home, low-budget experiments with small amounts of radioactive substances, and it has worked extremely well, with very consistent readings both when left in the same spot with background radiation and when it is placed next to a radioactive source (a sealed check source, uranium ore, a 2.33 g piece of depleted uranium metal, a thorium gas mantle, etc). Battery life is excellent. I have also had good luck with the software. The device records the number of counts for every second in its memory, which holds about two weeks of data. The software allowed me to download the data to my computer and convert it to CSV format, which can then be analyzed in Excel to see variations in natural background radiation, to determine if a very slightly radioactive source is measurably more radioactive than background, and the like. The sensitivity is a little low and quite dependent on where an object is placed relative to the narrow Geiger-Mueller tube, which is located at the bottom of the device below the buttons. I have two check sources: a sodium-22 source to check gamma sensitivity and a thallium-204 source for betas. With the beta source, I found that the plastic surrounding the GM tube prevents it from picking up the betas emitted by Tl-204 (maximum energy 764 keV; the advertised minimum for this device is 250 keV). If you open it up and put the source directly against the GM tube, it does gain the ability to detect them, although you shouldn't do this with non-sealed sources because they will contaminate the tube. With the gamma source, a 2-hour average of 6032 cpm was recorded, based on the source being placed directly against the bottom of the unit with the plastic back on. From this, I calculated an efficiency of 0.57%. This is a little low, but it still makes for a very useful device. Finally, the manufacturer runs a helpful forum where you can ask questions and try to solve issues you might have with it, and I hear their customer service is good although I've never used it myself. All in all, I'm very satisfied and the price can't be beat. edit: Got a third sealed check source: manganese-54, which emits only one gamma ray at 835 keV (99.98% of the time) and virtually nothing else. The sensitivity was only about 0.30%. I believe I overestimated Na-22 because it emits both a gamma and a positron (which produces another two gammas) on the vast majority of its decays. But even 0.3% is fine for most purposes and everything else is fantastic, so I'll keep the rating at 5 stars.
Review: Great little geiger counter! - This is a great little geiger counter (nuclear radiation monitor). This does not read EMF...that is another type of monitor. The GMC-320 measures Beta, Gamma, and X-Ray radiation. The GMC-320 does not measure Alpha radiation but the GMC-600/Plus does measure Alpha radiation. The GMC-320 does not have WiFi connectivity but the GMC-320 Plus does have WiFi connectivity. I am checking the GMC-320 with several types of radiation sources such as: rocks, beads and lantern mantles. I'm comparing the readings to an old Radalert (Model 50 or 100). The lantern mantles are quite energetic. There are all kinds of display modes including graphing. The monitor can interface with a computer. The monitor includes rechargeable batteries and can be charged via USB connection. The monitor measures 3 x 5 x 1" and weighs 4.37 ounces. A great little geiger counter!

## Features

- Newly designed digital geiger counter/data recorder, record the radiation data. Play it back later
- Automatic data recording and play back from pc later
- Open communication protocol for wide range radiation network support made easy
- Country of origin: United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00I8GQ1EC |
| Batteries | 14500 Lithium Ion batteries required. |
| Best Sellers Rank | #166,781 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #74 in Lab Geiger Counters |
| Date First Available | February 1, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.3 ounces |
| Item model number | GMC-320Plus Fulfill |
| Manufacturer | GQ Electronics |
| Product Dimensions | 5 x 2.85 x 1 inches |

## Images

![GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment - Image 1](https://m.media-amazon.com/images/I/41HyM+FaP5L.jpg)
![GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment - Image 2](https://m.media-amazon.com/images/I/41l+yYriR9L.jpg)
![GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment - Image 3](https://m.media-amazon.com/images/I/51HnEhn4kwL.jpg)
![GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment - Image 4](https://m.media-amazon.com/images/I/51JvC3fe3KL.jpg)
![GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment - Image 5](https://m.media-amazon.com/images/I/51JxMt8IQGL.jpg)

## Questions & Answers

**Q: Curious - if there were some kind of nuclear event, would the unit be rendered useless from the EMP?  Probably a dumb question.**
A: In a nuclear event, you'd also have to worry about this . . . .

The GMC 320 Plus's upper range limit is 32 millirem per hour. (A millirem is 1/1000th of a rem).
According to the scientists at the Oak Ridge National Laboratory, a Facility of the U.S. Department of Energy, in their 1987 "Nuclear War Survival Skills", small doses of around 6 rem per day should "produce no incapacitating symptoms. The human body usually can repair almost all radiation damage if the daily doses are not too large."
   They go on to say, "Instruments that measure only milliroentgen-range dose rates are sold for war use by some companies. Since most Americans have no idea what size of radiation doses would incapacitate or kill them, and do not even know that a milliroentgen is 1/1000 of a roentgen, some people buy instruments that are capable of measuring maximum dose rates of only one roentgen or less per hour." (One roentgen is equivalent to one rem.) The book further says that a meter that "can measure one roentgen (rem) per hour is far too low to be of much use in a nuclear war."

**Q: How likely is Alpha radiation to be encountered after a nuclear accident such as Fukashima?**
A: Alpha sensitivity is most useful for detecting particulate contamination on objects or the body. Uranium for example, is generally safe to handle, but as any alpha emitter, dangerous if ingested or inside the body. In this respect, alpha detection is good for "frisking".  While having a counter that's sensitive to alpha is quite useful, you have to know the characteristics of such a sensor to understand what the readings mean.As for Fukashima, most fission products of concern to humans are detectable by an ordinary beta/gamma detector. Cesium 137, Strontium 90, Cobalt 60, Iodine 131.  If you live in Japan, a detector such as this would be useful.  If however you live in the United States and are concerned about Fukashima byproducts reaching our shores via weather or food supply, a Geiger counter will be absolutely useless.  The levels are so unimaginably small that you need a proper gamma spectroscopy system to detect anything.

**Q: What is the tube model and maker ?**
A: The installed Tube is M4011 from China.  However, you can install any compatible tube you want. See GQElectronics forum for the tube examples.

**Q: Does this make the famous clicking sound that you hear from Geiger counters in movies and video games?**
A: Sure does, but you can turn it off if you want to. It's not the loud knock you would see (hear) in the movies but more of a click.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent device for the price. Only drawback is fairly low sensitivity.
*by T***K on June 12, 2015*

This is a very good Geiger counter for the price. I've been using it for some at-home, low-budget experiments with small amounts of radioactive substances, and it has worked extremely well, with very consistent readings both when left in the same spot with background radiation and when it is placed next to a radioactive source (a sealed check source, uranium ore, a 2.33 g piece of depleted uranium metal, a thorium gas mantle, etc). Battery life is excellent. I have also had good luck with the software. The device records the number of counts for every second in its memory, which holds about two weeks of data. The software allowed me to download the data to my computer and convert it to CSV format, which can then be analyzed in Excel to see variations in natural background radiation, to determine if a very slightly radioactive source is measurably more radioactive than background, and the like. The sensitivity is a little low and quite dependent on where an object is placed relative to the narrow Geiger-Mueller tube, which is located at the bottom of the device below the buttons. I have two check sources: a sodium-22 source to check gamma sensitivity and a thallium-204 source for betas. With the beta source, I found that the plastic surrounding the GM tube prevents it from picking up the betas emitted by Tl-204 (maximum energy 764 keV; the advertised minimum for this device is 250 keV). If you open it up and put the source directly against the GM tube, it does gain the ability to detect them, although you shouldn't do this with non-sealed sources because they will contaminate the tube. With the gamma source, a 2-hour average of 6032 cpm was recorded, based on the source being placed directly against the bottom of the unit with the plastic back on. From this, I calculated an efficiency of 0.57%. This is a little low, but it still makes for a very useful device. Finally, the manufacturer runs a helpful forum where you can ask questions and try to solve issues you might have with it, and I hear their customer service is good although I've never used it myself. All in all, I'm very satisfied and the price can't be beat. edit: Got a third sealed check source: manganese-54, which emits only one gamma ray at 835 keV (99.98% of the time) and virtually nothing else. The sensitivity was only about 0.30%. I believe I overestimated Na-22 because it emits both a gamma and a positron (which produces another two gammas) on the vast majority of its decays. But even 0.3% is fine for most purposes and everything else is fantastic, so I'll keep the rating at 5 stars.

### ⭐⭐⭐⭐⭐ Great little geiger counter!
*by S***. on March 21, 2021*

This is a great little geiger counter (nuclear radiation monitor). This does not read EMF...that is another type of monitor. The GMC-320 measures Beta, Gamma, and X-Ray radiation. The GMC-320 does not measure Alpha radiation but the GMC-600/Plus does measure Alpha radiation. The GMC-320 does not have WiFi connectivity but the GMC-320 Plus does have WiFi connectivity. I am checking the GMC-320 with several types of radiation sources such as: rocks, beads and lantern mantles. I'm comparing the readings to an old Radalert (Model 50 or 100). The lantern mantles are quite energetic. There are all kinds of display modes including graphing. The monitor can interface with a computer. The monitor includes rechargeable batteries and can be charged via USB connection. The monitor measures 3 x 5 x 1" and weighs 4.37 ounces. A great little geiger counter!

### ⭐⭐⭐⭐⭐ Fantastic value for the money
*by B***I on July 23, 2015*

This is an amazingly feature packed little device, and very well thought out. The screen is large and clear and backlit, and is put to good use. It even has a builtin gyroscope so it can flip the screen if it is held upside down. You can data log with it, and you can even hook it up via USB to your PC. It charges via USB as well, very convenient. The included detector tube inside the unit is an M4011, not the most sensitive and it will not detect alphas. But this is a good choice for a beginner and is inexpensive and pretty durable. The GMC-320+ is reasonably hackable. I just modified mine to accept an LND-7312 which is an exceptionally sensitive alpha/beta/gamma pancake detector. If you have a known calibration source, you can calibrate the device to uSv/h. Highly recommended.

## Frequently Bought Together

- GQ GMC-320Plus Fulfill Nuclear Radiation Detector Meter Test Equipment
- WERJIA Hard Carrying Case for GQ GMC300 Plus/GMC-320 Plus Radiation Detector
- Nuclear War Survival Skills Updated and Expanded 2022 Edition Regarding Ukraine Russia and the World: The Best Book on Any Nuclear Incident Ever ... New Methods and Tools As New Threat Emerge

---

## 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.com.om/products/10065572-gq-gmc-320plus-fulfill-nuclear-radiation-detector-meter-test-equipment](https://www.desertcart.com.om/products/10065572-gq-gmc-320plus-fulfill-nuclear-radiation-detector-meter-test-equipment)

---

*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-01-25*