Kistler, a leading provider of measurement technology, has unveiled its latest innovation in melt pressure sensors with the introduction of the Type 4004A. This new piezoresistive sensor, boasting a front diameter of just 3 mm, is specifically designed to operate directly in injection nozzles and small extruders. Its compact size allows it to measure pressure and temperature in close proximity to the plastic melt, making it ideal for applications in hot runner systems and additive manufacturing.
With an impressive operating range of up to 350°C, the 4004A melt pressure sensor delivers precise measurements of both pressure and temperature in injection nozzles and extruders. It features two separately calibrated pressure ranges, catering to the requirements of hot runners (up to 2500 bar or 36,000 psi) and additive manufacturing (up to 1000 bar or 14,500 psi). By monitoring changes in the pressure signal, the sensor can detect debris in small nozzles, nozzle wear, and melt backflow, ensuring optimal performance and preventing potential issues.
The Type 4004A offers easy access to key parameters through its Transducer Electronic Data Sheet (TEDS). Its diaphragm, constructed from hardened steel and boasting an IP65 degree of protection, enables its use in applications involving fiber-reinforced plastics. Additionally, the sensor can be safely employed in the medical and food packaging sectors due to the absence of oil or mercury in signal transmission.
The temperature-compensated pressure signal from the 4004A can be accessed via the sensor’s analog output or its RS232 interface. This versatility allows seamless integration with Kistler’s ComoNeo process monitoring system, enhancing overall control and efficiency.
The introduction of the 4004A miniature melt pressure sensor opens up new possibilities for precise pressure and temperature measurement in hot runner systems and additive manufacturing. With its compact design, wide operating range, and reliable performance, this sensor promises to advance the field of plastics technology.
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