Charged particle detectors based on thin single crystal diamond films (3.0×3.0×0.09mm3) grown by chemical vapour deposition (CVD) technique are developed at Ruđer Bošković Institute and low field mobility, transit time and saturation velocity, measured by using a 210Po alpha source in vacuum at room temperature, are presented. The comparison of the charge transport properties obtained by time of flight (ToF) technique between detectors based on the same diamond samples, but with different metallization of the electrodes (Au and Al, 100nm thick), and commercially purchased diamond detectors is performed. The fabricated diamond sensors showed a spectroscopic resolution of up to 1%, mobility up to 1808±16 and 1914±71cm2/Vs for electrons and holes respectively and carrier transit time below 2ns for an applied electric field of 17.8×103V/cm. Results also show variations of the charge transport properties according to the electrode metallization used and the different modality at which the detectors are irradiated. •- Possibility of using the diamond sensors also under condition of illumination and in air.•- Variation of the electronic properties of the charge carriers according to the different mode of irradiation.•- Variation of the electronic properties of the charge carriers according to the type of electric contacts adopted.•- Thin sensors report better spectroscopic performances compared to devices made of thick diamond samples.