The Extru-Sys Melt Pressure Measuring Chain Kistler Models 4090B, 4091B allows constant measuring of the melt pressure during extrusion. The unique silicon measuring chain, operating according to the piezoresistive principle, is located directly behind a solid, rugged diaphragm.

Because no pressure transmitting medium such as mercury or oil is used, this sensor is ideal for all types of materials including foodstuffs and medical products. The rugged diaphragm even withstands abrasive materials. The melt pressure measuring chain Type 4090/91B comprises the amplifier Type 4618A, the digital compensating amplifier Type 4620A for greater accuracy or the dual monitor Type 4801B and the sensor.

The Extru-Sys Melt Pressure Measuring Chain Kistler Models 4090B, 4091B contain a silicon measuring element which operates according to the piezoresistive principle. This element supplies reliable measurements 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 posh rods, oil or mercury. The diaphragm can thus be given a much more rugged construction without compromising accuracy and hysteresis.

• A single element measures pressure and, optionally, temperature as well.
• Contamination of the extruded material with mercury or oil is excluded
• Rugged diaphragm permits application in abrasive materials
• Short response time for the acquisition of high frequency pressure fluctuations
• Greater accuracy from digital compensation in the amplifier Type 4620A or 4801B
• CE compliance according to the directive 89/336/EEC

Kistler Models 4090B, 4091B Extru-Sys Measuring Chain