GQ GMC300EPlus Digital Nuclear Radiation Detector

Last updated date: July 9, 2020

DWYM Score

9.1

GQ GMC300EPlus Digital Nuclear Radiation Detector

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We looked at the top Radon Detectors and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Radon Detector you should buy.

Editor's Note July 9, 2020:
Checkout The Best Radon Detector for a detailed review of all the top radon detectors.

Overall Take

The small size makes this radon detector easy to carry around. It can auto-record data so you can compare levels over an extended period of time. The battery lasts and can be charged in the car or with a wall adapter.


In our analysis of 31 expert reviews, the GQ GQ Digital Nuclear Radiation Detector placed 4th when we looked at the top 7 products in the category. For the full ranking, see below.

From The Manufacturer

GQ gmc-300e Plus is a newer GMC300EPlus Fulfill of gmc-300 Series Geiger counter. Compared to the previous model, gmc-300e Plus improved overall quality. It installed a high contrast black/white LCD module, added a front LED indicator/an audio data port. The audio data port can be directly connected to any third party device application as data input, such as iPad. It is designed to be a portable/convenient device. It has built in audible and visual signals for the level of radiation detected. It can be used for nuclear radiation detection and monitoring both indoor and outdoor, as well as in other similar environments. It features automatic data recording. It can continually monitor the radiation and log the data each second into internal memory. When connected to a PC, software can download the radiation history data to the computer and the user is able to analyze those data later. the device is equipped with an USB port, utilized for communication and external power supply/charging of the internal rechargeable battery. The GQ gmc-300e Plus internal rechargeable battery can be charged via a wall adapter or via a car charger through the car cigarette lighter. By using the adapters, continuous data monitoring is possible. Using either power adapter you will not have to worry about the batteries charge condition or any data loss. The main board also has a real time clock on board for time related data logging purposes. The USB port communicates with the GQ gmc-300 soft Geiger counter software and the GQ Geiger counter data viewer software. the GQ gmc-300 soft Geiger counter software's appearance is an exact copy of the gmc-300 hardware human interface. You can download it for free and Explore the gmc-300 user interface before you purchase the real hardware. the GQ Geiger counter data viewer software can download the time stamped radiation (history) data from the unit and save it on a computer for future References analysis.

Expert Reviews

User Summarized Score

9.0
454 user reviews

What experts liked

The audio signals indicate the harmful levels through the visual readings along with the audible alarm built-in.
- Radon Gas Detector Reviews
It is really small and compact. One of our team carried it in his pants like a phone.
- Be On Home
The device is powered by an internal rechargeable battery which lasts a decent amount of time and can be charged via a wall adapter or a car charger.
- FabatHome
It can auto-record the data so easily permanently monitoring the levels of radiation and then stores the recorded data into the in-built memory.
- Authority Toplist

What experts didn't like

The overall instructions aren’t clearly mentioned.
- Radon Gas Detector Reviews
Built quality is not great.
- Be On Home

An Overview On Radon Detectors

Radon is a radioactive gas that is completely undetectable by humans because it is colorless and odorless. It is created when uranium or other radioactive materials decay and come out of rock formations, soil and specific building materials.

Just because humans cannot detect radon doesn’t mean it doesn’t affect us, though. In fact, it is blamed for over 20,000 lung cancer deaths per year in the United States and is the second-leading cause of lung cancer, after cigarette smoking. Exposure to this gas over a long period of time can increase our chances of getting lung cancer by 50%.

Toxic exposure from radon is most common in the northern, midwestern and southwestern states. However, this gas can be found all over the country. This is why it’s imperative to test for it in your home. If you’re buying a new house, be sure to test for radon there before you finalize the purchasing agreement. According to the EPA, one out of every 15 homes in the United States has high levels of radon.

There are a number of times when you should be testing for radon gas. If you’re buying or selling a home, always check for radon before finalizing any paperwork. If you’re buying a new build, ask whether radon-resistant construction materials have been used. You will also want to check if the building site has been tested for radon before. It’s also best to check for radon in workplaces as well.

A safe level of radon should be at 4 picocuries per liter (pCi/L) or lower. If it’s any higher than that, this means that you or your loved ones are at risk. Because radon is colorless and odorless, you need a special testing kit or detector to see whether it’s present.

Two main types of devices detect radon: passive and active. A passive device is a manual gadget that doesn’t require electricity. It needs to be placed at the testing site for a specified period of time, after which is is away for analysis. An active device is an electrical gadget that monitors radon continuously. It’ll monitor the level of the gas over an extended period of time and can detect abnormalities or any unusual activity in the gas level. Active gadgets also deter any test interference so that you can be sure you’re getting accurate results. While active devices are more costly than passive ones, they are far more reliable as well.

The Radon Detector Buying Guide

  • The most important element to consider when looking for a radon detector is its level of accuracy. You want to ensure that the device is able to deter any interference so you can get reliable results. If you don’t get accurate test results, you or your family could be in danger of getting sick from the toxic gas. In order to get a reliable result from short-term testing, be sure to keep your windows and doors closed aside from normal use. Do not conduct your test when there are heavy winds as that can alter the results. Also, you will need to place the device at least 20 inches above the floor. It should be on a stable surface where it’s away from drafts, heat, humidity or outside walls. Remember to carefully follow the device’s instructions and record the day and time you began your testing.
  • Access to testing data is important if you want to analyze the results. Many electric radon detectors will have Bluetooth connectivity so that you can view the results on an app on your mobile phone. This makes it quick and easy to get results without waiting for a lab. In some cases, you can actually set up alarms on the app to go off if the radon reaches a toxic level. This is a good option for long-term testing.
  • For many shoppers, portability is key. When you’re testing a new building site, you may not have access to an outlet to plug in your radon monitor. This is when a battery-powered gadget comes in handy. Not only is it highly flexible so you can place it anywhere in the home, but you can use it within areas where you don’t have any electricity.
  • If you’re going to be moving the detector from place to place, also look at the size of the gadget. Some are small enough to fit in your pocket like a mobile phone, while others are big enough that you’ll need a bag to carry them around.
  • Having a clear LCD display that shows you the radon levels can be helpful. In some devices, the display is located directly on the gadget itself. In others, you can view the results through a mobile phone app. Consider what is more convenient for you before making a purchase.