The 10-way signal amplifier interfaces with the "Provaset", and serves to drive from 1 to 10 of our air extractors equipped with inverters (ES 1500IN ES 5000IN ES 12500IN) by modulating the extractor speed with digital controls. The minimum and maximum depression required for the confined area and the equipment is defined on the Provaset, Provaset plus the signal amplifier provide for modulating the speed of the extractors, guaranteeing a constant depression in the confined area.