The ALPHA 400 volumetric respirator at a set frequency handles anaesthesia and resuscitation of animals from 100 to 1,200 kg. It monitors the respiratory parameters and/or respiratory assistance and/or resuscitation and / or totally takes care of the anaesthetised animal if necessary. It ensures safe anaesthesia of large animals, from spontaneous mode to total respiratory control. Intermediate monitoring or partial assistance modes are also controlled. Its trigger regulates the respiratory frequency (barometric application). It is equipped with all of the necessary safety systems for surgical operation in the best conditions for both the animal and the practitioner.