ABSTRACT Integrated photoelectric photometry of nine planetary nebulae is presented. The total flux in the Hβ emission line, the equivalent width WHβ, and the [O III]/Hβ ratio were obtained for each object by a photometric system composed of three interference filters: an Hβ narrow, an Hβ wide, and an [O III] filter centered at 5000 Å, with passbands of 30 Å, 150 Å, and 70 Å, respectively, calibrated through the observation of spectrophotometric standard stars.