Abstract: A device for analyzing at least one parameter of a chemical or biochemical or biological reaction in a reaction container, the analysis device includes an arm intended to be fastened by means of a sliding link against a face of a wall of the reaction container by means of a static end, the arm having a degree of freedom in translation in relation to the wall, a sensor designed to measure the at least one parameter, the sensor being fastened to a free end of the arm, a drive device designed to cause an axial displacement of the arm along the degree of freedom, a hermetic isolating device for isolating the arm from the reaction, the hermetic isolating device joining the arm to the face of the wall.

Abstract: A kit, for analyzing and monitoring a parameter of a reaction in a reaction chamber, includes: a hollow tube fastened by its ends to the reaction chamber; and a capsule provided with a sensor and guided along the hollow tube via a magnetized magnetic piston disposed in the hollow tube and controlled by a guide device. The hollow tube imposes a predetermined trajectory on the capsule to maintain the capsule at a distance from any mobile member to prevent the capsule from damage. The hollow tube can extend over the entire depth of the reaction medium to allow measurements over the entire depth of the medium.