Transparent ionization chamber with integrated electronics and internal LCD display. The DAP W1 is intended to be mounted on the face of diagnostic X-ray collimators for measuring dose area product or AEP (Area Exposure Product) during diagnostic radiological examinations. The DAP W1 was especially designed for mounting close to the X-ray tube and is inserted into the guide rails of the collimator. The fixation of the chamber may be done by the user. Delivered with optional choice of insertion frames (176 or 167 mm) or adapter for additional filters.