RADEX RD1503+ Geiger Counter Radon Detector

Last updated date: July 9, 2020

DWYM Score

9.3

RADEX RD1503+ Geiger Counter Radon 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

Don’t worry about missing alerts — this detector has both vibration and audio options. It’s a highly portable device that’s easy to use. It can also measure x-ray radiation as well as the amount of radiation built up over time.


In our analysis of 37 expert reviews, the RADEX RADEX RD1503+ Geiger Counter Radon Detector placed 3rd when we looked at the top 7 products in the category. For the full ranking, see below.

From The Manufacturer

This new device allows a quick and easy way to check radiation background of top soil, non-edibles and interior premises. The quality of indication of any dosimeter depends primarily on the built-in detector of ionizing radiation. RADEX RD1503+ contains a low-voltage SBM20-1 type Geiger-Muller counter of beta- and gamma-radiation which is found used in professional dosimetric equipment. An expert scientific tool that’s made for an average Joe.

Expert Reviews

Expert Summarized Score

10.0
6 expert reviews

User Summarized Score

8.4
500 user reviews

What experts liked

Highly accurate and easy to hold. A good solution in extreme temps. You don't need to calibrate it first.
- BestReviews
It can also measure X-ray radiation.
- Radon Gas Detector Reviews
Radex RD1503+ can also tell the level of radiation build over time. All you have to do is switch to accumulative dose mode.
- Be On Home
This powerful Geiger counter can quickly check radiation background from many sources including non-edibles, interior premises, and the topsoil.
- FabatHome
This device displays the dose-rate difference between the two figures, the mean and the background ones.
- Authority Toplist
It is equipped with a vibration feature along with its audio alert, so it keeps you informed even when it is tucked away in a pocket.
- Wiki EZ Vid

What experts didn't like

Cannot be used in a wet environment.
- BestReviews
Manual isn’t clearly laid out.
- Radon Gas Detector Reviews
Maybe expensive compared to a few of its competitors.
- Be On Home
Battery cover is poorly designed
- Wiki EZ Vid

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.