RADEX RD1706 Radiation Detector

Radiation Detector

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RADEX RD1706 Geiger Counter is a major step up from the basic 1503 model.  Along with all options and sturdiness of RD1503 it is capable of additional functions:

  • X-ray particle detection

  • short sampling interval

  • sound and vibration alarm

  • ±15% accuracy

  • 999.0 µSv/h upper threshold 

The device has retained «BACKGROUND» mode used in RD1503+ (very convenient for performing inspections inside premises and materials).

RADEX RD1706 contains two SBM20-1 type Geiger–Muller counters, which allow one sensor to be dedicated for beta- and gamma-rays.  The use of two separate sensors allowed a significant reduction in measurement cycle (from 40 seconds to 26 seconds) while improving precision of measured results.

RD1706 can register and display the value of a dose-rate as high as 999.0 µSv/h.

When presence of a strong radiation source is detected, measurement period drops from 26 seconds to as low as 1 second, to provide real-time accurate radiation read out.

Most other features from the RADEX family were also retained, i.e. the usual frame with a large LCD screen, three buttons operation, battery charge indicator, display backlighting and personal settings like threshold alarm activation, alarm signal strength, and backlight option.

 You can familiarize yourself with the RD1706 device operation by using a flash model below or reading the "Operation Manual". 

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Improvements of RADEX RD1706 over the basic model RADEX RD1503

  • detects Gamma-, Beta- and X-ray radiation;
  • expanded detection range (to 999.0 µSv/h);
  • shortened measurement time (26 seconds);
  • one second sampling for radiation above above 3.5 µSv/h;
  • higher precision (verified by US and Japan Consumer agencies);
  • higher threshold level range (to 99.0 µSv/h);
  • «BACKGROUND» mode for performing inspections inside premises;
  • ability to display a measured indication in excess of pre-set Background;
  • value of Background is saved even when the device is turned off;
  • vibration alarm;

Technical specifications

Scale range of ambient dose rate equivalent µSv/h from 0.05 to 999.0
Scale range of Gamma- radiation energy MeV from 0.1 to 1.25
Scale range of X-ray radiation energy MeV from 0.03 to 3.0
Scale range of Beta- radiation energy MeV from 0.25 to 3.5
Reproducibility of results (at P=0.95) where P is a dose rate in µSv/h % 7+6/Р
Audio Alarm threshold levels µSv/h from 0.1 to 99.0
Measurement Cycle seconds from 26 to 1*
Measurements - continuous
Batteries («AAA»)


Time of continuous operation, not less than hours 500**
Overall dimensions Height x Width x Depth  mm 105х60х26
Weight (without batteries) g 90

* 1) Measurement Cycle decreases when the ambient radiation exceeds 3.0 µSv/h.
   2) The more Measurement Cycles conducted the greater the reliability of indications.

** 1) Using factory settings, with ambient radiation below 0.3 µSv/h and two "AAA" batteries with a capacity of 1350 mAh.
     2) The device can operate with one power element «ААА» type (the time of continuous operation will be reduced).


Latest Radiation Map


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How does it compare with other nuclear accidents and our everyday radiation exposure?

Not all radiation is the same, so scientists use the ‘sievert’ to measure the health risks of radiation.

SAFE Radiation Dose: 0.09 microsieverts
Exposure: One year living within 50 miles of a nuclear power plant 


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