The invention relates to a monocanaliculonasal andor monocanalicular intubation assembly particularly intended for lacrimonasal imperforation including a probe made of a first material, in particular a flexible material such as silicone, the probe having a substantially cylindrical shape along a longitudinal axis; and a device for inserting the probe into a lacrimal canal or canaliculus. The polarization generation part adjusts the polarization state of the illumination light emitted from the light source on the basis of predetermined illumination conditions and the polarization analysis part adjusts the polarization state of the illumination light emitted from the light source on the basis of predetermined detection conditions. The second module determines a value based on the expected response and a measured response of crankshaft speed due to combustion within the cylinder of the engine. Collection of the filtrate substance within the pores of the particles rather than within the interstices of the bed enhances the filtering capacity and does not impede the flow of fluid through the bed of particles.