The Alpha E is an ultra small continuous monitor for professional use. Due to the light weight and small dimensions it can perfectly be used to measure the personal exposure and to manage personal doses.
Based on a silicon diode 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 (12 % uncertainty at 1 sigma / 24 hrs.). 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 like in water works, mines, etc.
Up to 6 months battery life allows long-term measurement without mains power. Via USB port it is also possible to power the device permanently from mains supply.
AlphaE stores all measurement data in the internal flash storage. In 1 hr. measurement cycle up to 6 month of measurement data is available for read-out via the USB port. In addition to the radon measurement the data from the built-in tampering/ detector and temperature sensor are recorded as well as the precise measurement time. Communication software is available for readout and export to Excel or DataEXPERT etc.
- Time-resolved measurement for the exact determination of radon
- Short-term / long-term radon examinations/control of objects
- Ultra-small and light-weight with optional belt bag, alternatively for wall-mounting
- Measurement of personal exposure for workers in health centers, mines, waterworks etc.
- Battery operation up to 6 months
- Cost-effective radon investigation in biology
- Wide measurement range up to 10 MBq/m³
- Local dose assessment indoor and outdoor
|Detection principle||Diffusion chamber with silicon diode|
|Measurement range/measurement unit||20 Bq/m³ … 10 MB/m³ (0,54 pCi/l … 270 nCi/l) SI [Bq/m³] / US [pCi/l] (specify with order)|
|Sensitivity||3 cph at 100 Bq/m³|
|Dose calculation / range||Based on user-settable equilibrium factor / 0 … 1 Sv (0 … 10 rem)|
|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||108 mm x 68 mm x 30 mm|