Abstract: Continuous freeze drying apparatus composed of a vessel whose internal chamber houses a cooled revolving cylinder on which a nebulizer sprays the material to be freeze dried.A scraping blade, grazing the freezed material, removes it making it fall onto revolving holed planes heated by heating elements interposed between these revolving planes, in order to obtain a quick sublimation of the substance to be freeze dried.

Abstract: A digital and programmable measuring and control instrument comprising a digital-analog converter receiving an analog signal from a pressure transducer and converting it into a digital signal and dividing the same in about 4,000 parts separated in thousands, hundreds, tens and units. The so divided signal is delivered to programmable memories that evaluate the level thereof and refer it to stored values, in such a way as to produce a signal to be shown by display means indicating the precise and actual measurement. The output digitalized and linearized signals from the programmable memories are also delivered to additional programmable memories that evaluate them and in turn transmit programmed signals to a digital-analog converter that generates in response a signal to be used for commanding operative units. Additional control signals from the programmable memory are used as actuatable signals for control or alarm units.