Extrusion Pressure Sensors Kistler Models 4096A, 4097A
The Extrusion Pressure Sensors Kistler Models 4096A, 4097A allows constant measuring of the melt pressure during extrusion. Because no pressure transmitting medium such as mercury or oil is sued, this sensor is ideal for all types of materials including foodstuffs and medical products.
The extrusion pressure sensor Type 4096/97A contains a silicon measuring element which operates according to the piezoresistive principle. This element operates reliably even at high temperatures, and can thus be located directly behind the diaphragm; therefore, it is not necessary to use pressure transmitting devices or media such as push rods, oil or mercury. The diaphragm can thus be given a much more rugged construction without compromising accuracy and hysteresis. This rugged diaphragm construction makes it possible to use a bronze or copper wire brush for cleaning purposes at maximum operating temperatures without the risk of damaging the sensor in any way. The solid state design resulting in the high natural frequency allows measurement of high frequency pressure fluctuations. In order to guarantee its use in existing measuring systems as well as open and closed loop control systems, the sensor is equipped with an 80% shunt mode calibration function. Any necessary zero balancing can be carried out with an accessible potentiometer in the sensor circuitry.