BAB E

Type of radiation detected

a and �

Type of detector

Large area dual silicon diode, 2 x 360 mm�

Energy range

Temperature range

Between +5�C and +45�C (41�F to 113�F)

Compliance with CEM norms

Measuring range

Display units

Bq/m�, �Gy/h

Sampling volume

6 m�/h

Relative humidity

Up to 80% humidity without condensation

Protection index

IP 55 (IP 54 for ventilation openings)

Alarms

Audible and visible alarm with two adjustable alarm thresholds for type of radiation a or �

Communication

ShortLINK or SkyLINK (radio), VD/VR

The radioactive dust is deposited by air suction on a filter paper placed in the BAB beacons.
The suction flow rate is about 5 m3/h (it depends on dustiness and type of filter paper).
The flow rate is calculated from the depression measured between the filter and the pump. This allows to detect any tear or dust clogging.
Placed one centimeter above the sample, the detection system is based on two 300 �m thick silicon diodes with a surface of 360 mm2.
The analog signal from the two diodes is amplified by a preamplifier with an output range of about 30mV/MeV.
An amplifier increases the signal amplitude to 0.7V/MeV, and the signal is then used to produce the energy spectrum via an amplitude analyzer that encodes information to 512 channels.

GM-xN Gamma Probes
DataEXPERT monitoring software
Integrated SkyLINK/ShortLINK radio modem
Detector lead shielding to reduce background noise in case of a radiological accident
Local and remote alarm box