9 FERMENTATION TANKS; PNEUMATIC, ELECTRIC AND ELECTRONIC MEASURING INSTRUMENTS FOR THE MEASUREMENT AND SURVEYING OF PRESSURE, TEMPERATURE, GAS COMPOSITION, WEIGHT, FLOW, CELL CONCENTRATION, LIGHT CONDUCTIVITY, COMPOSITION OF LIQUIDS, PARTIAL PRESSURE, PH AND TIME, SIGNAL PROCESSORS, WITH SEMI-AUTOMATIC AND FULLY AUTOMATIC CONTROLS, PILOT VALVES, FERMENTATORS AND COMPUTERIZED CONTROLS FOR USE IN THE FIELD OF FERMENTATION TECHNOLOGY, LABORATORY EQUIPMENT, NAMELY SCIENTIFIC HEATERS, COOLERS AND FREEZERS