Model SD10 features a high sensitivity scintillation probe for detecting low energy gamma emitters such as Iodine-125. The detector utilises a fast response photomultiplier tube and a 25.4mm x 2mm thick sodium iodide crystal with a thin 1mm (7mg/cm2) aluminium window. Suitable for thyroid monitoring of 125I uptake. It is also suitable for detection of shielding leakages, x-ray and gamma radiation work.