Internet #313574674

Model #P4SRDU

Pro4 Series Electronic Radon Gas Detector

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Product Overview

The Safety Siren Pro4 Electronic Radon Gas Detector with digital LCD display continuously monitors Radon Gas with 3 audible alarm modes that alerts you to protect your family from lung cancer from radon gas exposure with the only EPA evaluated radon gas alarm. The Safety Siren Pro4 Electronic Radon Gas Detector is not like a single use radon test detection kit, this digital radon gas monitor for home testing is a continuous radon tester that performs continuous radon gas monitoring. The easy to read, digital radon level display shows short-term radon levels as well as long-term radon level averages. The electronic radon monitor gives its first radon reading after 48-hours of radon gas sampling. Radon gas in air or water is a health hazard resulting from uranium breaking down in soil. Radon is a radioactive gas that is colorless, odorless, and tasteless and is impossible to detect without the use of sensitive test equipment. Radon gas rises through the soil and seep through cracks, holes and drain pipes in the foundation or basement. Exposure to radon can cause lung cancer. Continuous home radon monitoring is recommended in high radon areas or when radon mitigation systems are used. Radon gas levels change according to humidity and season. The EPA presently suggests that corrective action be taken to reduce the radon levels in your home if measured over the long term at 4 pCi/l or greater.
  • LCD display radon gas detection level display range: 0.0 to 9999.9 pCi/L
  • Samples air continuously, short term readings show from last 2 to 7 day averages and long term readings shows averages from last reset or up to 365 days
  • 3 audible alarm modes if short or long-term radon gas averages are 4 pCi/l or greater
  • Plugs in to standard 120-Volt household outlet
  • Samples the air continuously with the display updated every hour
  • Every 24 hours, the detector will do a self-test, an error code displays if test fails
  • Back light options to illuminate display for easy viewing
  • User can manually test the detector operation
  • Easy to read numeric LED display
  • Records and displays length of time in radon measurements
  • Warning icon, a visual indicator when radon levels are high
  • Clear and reset the memory to begin new tests



Product Depth (in.)
4.62 in
Product Height (in.)
2 in
Product Width (in.)


Battery Type Required
None, Manual Operation
Commercial / Residential
Commercial / Residential
Detects/ Tests For
Radon Gas
On-Unit Display
Power Type
Review Function
Multiple Readings

Warranty / Certifications

Manufacturer Warranty
1 Year Warranty

Questions & Answers


I see that you can set this to alarm off for 90 days, but can you turn the alarm off entirely? I...

Asked by Radon July 13, 2020

If the radon detector goes into the alarm state, if will sound 4 short beeps once an hour. At any time, the user can choose to mute the alarm for 30 or 90 days, but it cannot be turned off completely. The alarm will beep only if your radon is 4 pCi/l or greater. Note the device emits 4 short beeps to alert you and not an actual permanent alarm.

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