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Radiation Alarm Monitors & Detectors:
3cc CsI Gamma Sensor

SemeaTech's 3cc Cesium Iodine Gamma Sensor Module consists of a cesium iodide crystal, a photodiode, and a high-gain preamplifier that can be used to measure X and γ radiation from 50keV to 3MeV. It features high sensitivity and an instant response time (of about a second) to a very minor change of X and γ ( 0.01 μSv/h ).

The sensor is housed in a 45x24x18±0.5mm metal housing with a cable of approx. 55mm as the connection interface. The connector is a 4-pin MOLEX PicoBlade 1.25mm (.049") connector (reference Molex connector, part no. 51021-0400).


Electric Characteristics:

Output a full width at half maximum of approximately
60us quasi-Gaussian pulse
Pin assignments:
Power 2.7V ~ 3.3V
Bias 30V recommended, maximum 50V
Noise Level 80mV±15mV at room temperature

Detection Performance:

Energy Detection Range 50keV to 3MeV
Signal amplitude 0.9V±0.1V @662keV
Detection efficiency 25000±20% count/uSv @662keV
Noise Temperature Effect Refer to PIN Diode Characteristics
Working Temperature -20° to 50°
Life Span 5 years