The AlphaE is an ultra small continuous radon monitor for professional use. Due to the light-weight and small dimensions it can perfectly be used to measure the personal radon exposure and to manage personal doses.

Based on a silicon diode diffusion chamber, the sensitivity is 3 cph at 100 Bq/m³. Thus, also low radon levels below 100 Bq/m³ can be measured as specified by the latest WHO recommendations. The calculation of dose is possible due to a user-settable equilibrium factor.

The development of the instrument is based on cooperation between Saphymo GmbH and the Helmholtz Zentrum, Munich. Extensive measurements and site-tests performed by the Helmholtz Zentrum prove the validity of calibration and correct operation, even in higher humidity applications such as in water works, mines, etc.

Detection Principle Diffusion chamber with silicon diode
Measurement range 20 Bq/m3 ... 10 MBq/3
Sensitivity 3 cph at 100 Bq/m3
Measuring cycle Adjustable from 1 min to 12 hrs
Storage capacity 12 900 data sets (ca. 9 … 6 450 days, depending on set measuring cycle)
Diffusion time constant Typically 1 … 2 hrs (user adjustable smoothing factor)
Battery life (rechargeable)
up to 6 months (rechargeable via USB)
Interface
USB, cable incl. charging unit
Additional sensors
Temperature sensor, tamper detection
Display
6 digit LCD + 5 digit alphanumeric, backlight
Dimensions / Weight / Housing
108 mm x 68 mm x 30 mm / 165 g / aluminium

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