Safe and Sound Pro II RF Microwave Radiation Meter

Safe and Sound Pro II RF-EMR Meter is a good choice for measuring Wi-Fi, 3G, 4G and 5G frequencies (from 600 MHz to 10,000 MHz) that S4WT recommends is the following:

Safe and Sound Pro II RF-Meter

“Use only the peak and max (maximum of peak values detected since the meter was turned on, sometimes referred to as “peak hold“) values when considering the biological effects of pulsed, data-modulated, Radio-frequency Electromagnetic Microwave Radiation (RF-EMR). The average reading is provided as a reference to [FCC and wireless] industry standards that consider only average power levels and their thermal and heating effects on tissue.”

Building Biology RF-EMR Exposure Guidelines: and

No HazardSlight HazardSevere HazardExtreme Hazard
< 0.1 µW/m²0.1 µW/m² to 10 µW/m²10 µW/m² to 1,000 µW/m²> 1,000 µW/m²

This is very well explained here:

Difference Between Peak and Average RF-EMR
Target RF-EMR range: 0.1–10 µW/m²

Safe and Sound Pro II RF Meter.

The Safe and Sound Pro II RF Meter is a compact, simple to use meter for Radio Frequency / Microwave Radiation (200 MHz to 12Ghz). The meter has been tested and certified by The Centre for Intelligent Antenna and Radio Systems (CIARS) Lab at the University of Waterloo in Ontario, Canada. The Pro II includes all the same features the original Safe and Sound Pro has: Max Hold, USB power jack for continuous monitoring, Adjustable volume control and 2.5mm headphone jack and sound signature analysis. New features include: Max Reset Button, lower noise floor, a more robust and bright display and an upgraded microprocessor.

Safe and Sound Pro II Features:

  • True response detection range: (650 MHz to 10 GHz) +/6dB, effective 200 MHz to 12 GHz
  • Accuracy +/6dB Performance tested in a 3rd party certified RF testing lab
  • Each meter is individually calibrated and QC inspected
  • Will measure 5G cellular signals between (200MHz 12GHz)
  • Measures power densities from below 1 µW/m², up to 2,000,000 µW/m²
  • Max Hold with option to clear at anytime
  • High quality adjustable Volume Control, as well as 2.5mm headphone jack
  • Two Year Warranty

Safe and Sound Pro II Specifications:

Frequency Range of Meter:650 MHz – 10 GHz (will detect signals from 200 MHz to 12 GHz)
Accuracy+/- 6dB – 3rd Party Certified
Frequency Measuring Range<0.1 µW/m² to >2,000,000 µW/m²
Sampling Rate<5 μs
Size:6″ x 3.5″ x 1″ (15cm x 9cm x 2.5cm)
Weight0.6 lbs (0.286kg)
LED ColorRanges @ 2.4 GHz
Green (Flashing)@ <1 µW/m²
Green@ 1 – 10 µW/m²
Yellow@ 10 – 100 µW/m²
Orange@ 100 – 1,000 µW/m²
Red@ 1,000 – 10,000 µW/m²
Red (Slow Flashing)@ 10,000 µW/m²- 100,000 µW/m²
Red (Fast Flashing)@ >100,000 µW/m²