A method for collecting and preserving semen of various animals including humans, canines, porcines, bovines, ovines and others involves collecting the semen into a collection vessel where the collection vessel is provided with an extender solution for the semen prior to its collection. The user obtains a first security token by providing the user’s credentials. The control system is compatible with category 2 of ISO 13849-1. The low glass transition temperature gives the superabsorbent composition many beneficial properties. The luminance controlling module is used for comparing the first voltage with a clock signal, and for generating a pulse width modulation signal according to a result of the comparison, so as to dynamically control a duty cycle of the light emitting module.