The 31021 Semiflex 3D chamber is ideal for dose measurements in small fields as encountered e.g. in IORT, IMRT and stereotactic beams as well as for dose measurements in standard fields up to 40 x 40 cm2. Relative dose distribution can be measured with high spatial resolution in any direction. The waterproof, fully guarded chamber can be used in air, solid state phantoms and in water.