The homogenization efficiency of an atypical helical ribbon impeller was investigated. In a first part, circulation and mixing times for Newtonian fluids have been determined by use of conductivity and thermal methods. A transfer function model have been used to fit response curves obtained after tracer injections. The proposed model only depends on two parameters. Variations of these two parameters have been correlated with the rotational impeller speed and the Reynolds number value. This work allows us to predict, whatever flow regimes and process conditions (viscosity, rotational impeller speed), the mixing process performance.