On behalf of Pirkanmaa Hospital District, Tuomi Logistiikka Oy is requesting tenders for dosimetric equipment used for water tank measurements in external beam radiation therapy. The measurements include both absolute dose and relative dosimetry (depth dose curves, beam profiles, output factors). Clinical environment The Unit of Radiotherapy at the Department of Oncology at Tampere University Hospital has seven linear accelerators: two Varian Clinac 2300 iXs, two Varian TrueBeam STxs, two Varian TrueBeams and one Varian Clinac 600C/D. At the moment the Unit has PTW MP3 Phantom tank, PTW electrometers and radiation detectors from PTW and IBA.