- Double Sensitivity: Two Geiger-Muller radiation sensors (2x SBM20-1 Geiger-Muller)
- Greater Accuracy: Detects Beta, Gamma, and X-rays
- Faster data accumulation gives much faster refresh rate than single sensor units
- Bigger Range of detection 0.05~999.0 uSv/hr
- Certified in Germany, tested by Japanese Consumer Protection Agency
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RADEX RD1706 Dual-Pro Professional dual-sensor Radiation Detector / Geiger Counter
|Sale:||$248.95 & FREE Shipping. Details|
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Specifications for this item
|Brand Name||RADEX by Quarta-Rad|
|EAN||4016138737028 , 0729440623975 , 4820052662980 , 0732101149776|
|Item Weight||3.2 ounces|
|Lower Temperature Rating||0 degrees_fahrenheit|
|Manufacturer Series Number||RD1706|
|Material||Plastic casing with metallic sensors and LCD screen|
|Maximum Temperature||149 degrees_fahrenheit|
|Number of Items||1|
|Special Features||Twice as accurate! Professional radiation detector. , Tested by the Japanese Consumer Protection Agency. , As accurate as a 2000 dollar lab station the size of a typewriter! , Second to none in precision. , Measures in micro Sieverts (modern SI units) , Two types of alarms: audio and vibration , Calibrated using Cesium-137 isotope. No additional calibration required , RADEX brand – since 1992 , Detection range: 0.05 – 999.0 uSv/h , Very simple to use: just turn it on and hear it click!|
|Specific Uses For Product||Professional Geiger counter for detecting ionized radiation indoors, outdoors and in objects.|
|Specification Met||CE certified; Japanese Consumer Protection Agency tested|
|UPC||729440623975 , 732101149776|
|Warranty Description||1 year manufacturer's warranty. Does not cover broken LCD screen or water damage. With RMA only|
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RADEX RD1706 is the new addition to the RADEX family of radiation detectors and monitors. This device can be used not only by professionals working with sources of ionizing radiation, but also by average consumers interested in checking the contamination of places and objects, and knowing the results with higher degree of precision.
RADEX RD1706 is capable of:
increased precision of indications
expanded range of indications (to 999.0 uSv/h)
range of measured Gamma radiation energy: 1-1.25 MeV
range of measured X-ray radiation energy: 0.03-3.0 MeV
range of measured Beta radiation energy: 0.25-3.5 MeV
time of continuous operation: ~500 hours
able to register x-ray radiation
This model uses two SBM20-1 type Geiger Muller counters, one each for beta- and gamma-rays. The use of two separate sensors allowed us to reduce time of observation to 26 seconds while improving accuracy and precision of results. The range of indications was expanded 100 times, compared to RADEX RD1503.
RD1706 can register the value of a doze-rate as high as 999.0 uSv/h. Time of observation automatically adjusts from 26 seconds to as low as 1 second when presence of strong radiation sources is detected. This is necessary to ensure safety of professionals working with or operating ionizing radiation sources.
Most other features from the RADEX family were also retained, i.e. the usual frame with a large LCD screen, three operation buttons, battery charge indicator, display backlighting and personal settings like threshold alarm activation, alarm strength, backlight option.
Professional, rugged detector that is incredibly simple to use and understand.
Top customer reviews
Geiger counters are bought for numerous reasons, ranging from safety awareness of radiological hazards to hobbyists who collect radioactive minerals and antiques. If you buy a Geiger counter for reasons of safety, I think it's very important that it gives you a reasonably accurate reading of potential dosage to your body. So how accurate is the Radex RD1706? To help answer that question, I ran the unit through several tests, comparing its readings to an industrial-grade unit that is calibrated from 0.01 up to 1000.00 μSv/h. While I didn't subject the unit to precise, laboratory testing conditions, I think I was careful enough to arrive at some interesting conclusions. Note: since the Radex unit is limited to β and γ radiation, the calibrated unit has been set to filter out α-particles for accuracy.
Test One was done to simulate elevated background radiation. In this test, I used a ceramic plate glazed with uranium oxide, and tested readings at several distances. Here are the Radex GD1706 readings at specific distances:
24"--0.38 µSv/hr, 12"--1.8 µSv/hr, 6"--5.6 µSv/hr, 1/16"(basically touching)--41 µSv/hr.
Now here are the readings on the calibrated unit at the same distance:
24"--0.2 µSv/hr, 12"--0.75 µSv/hr, 6"--1.9 µSv/hr, 1/16"(basically touching)--7.5 µSv/hr
While both the Radex and the calibrated unit took similar readings at distance, the Radex appears to over-estimate the β and γ dose at closer distances.
Test Two was to simulate a small, stronger point of radiation such as a hot fallout particle that might settle on clothing. The source here was an Americium-241 sample isotope.
First the Radex 1706 readings: 4"--0.08 µSv/hr, 2"--0.32 µSv/hr, 1/16"--1.75 µSv/hr.
Readings from the calibrated unit: 4"--0.03 µSv/hr (hard to distinquish from background radiation), 2"--0. 1 µSv/hr, 1/16"--4 µSv/hr.
Note: only β and γ radiation were measured in this test. The α particle count is ~100 times higher, and would be a health concern. For counting just β and γ, I also have concerns over the discrepancy, since 4 µSv/hr approaches the threshold for safety.
What can we conclude from these tests against the calibrated unit? It appears that when the Radex RD1706 is exposed to higher amounts of radiation, it either over-samples or does not sample nearly enough. Perhaps the unit's margin of error is magnified in these situations? Whatever the reason, I'm not satisfied the RD1706 is accurate enough to serve as a personal dosimeter. However, it's a compact and elegantly simple device that works well enough to alert me to elevated radiation levels in objects--when personal safety is not a concern. Btw, it's definitely not qualified to detect isotopes in food--that can only be done by a laboratory. Score for design and construction: 5/5 stars. Score for accuracy: 3/5 stars.
To date I haven't found any solid foods that were contaminated. However, I have found milk, green tea and bottled water that tested above background radiation levels. It's a judgement call but I'm discarding all solid foods and drinks that measure above the background radiation level.
It is very important to properly setup this device. It's a little confusing but if you stay focused and persistant you will get it to funtion as it is designed.
This device has made life a little easier knowing that our family has some chance at survival by not consuming food and/or liquids that are contaminated with radiation.