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Dynisco

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Dynisco

Dynisco is a leading American manufacturer of precision measurement technology and process controllers for plastics and rubber processing. With a catalog of 1,196 products, Dynisco supplies melt pressure sensors, melt temperature sensors, process controllers, pressure transmitters and specialized measurement systems for extrusion, injection molding, blow molding and polymer compounding.

Melt pressure sensors are the core product of Dynisco and are globally recognized for their accuracy and reliability in demanding polymer processing environments. The sensors measure the melt pressure of molten plastic directly in the extruder head, adapter valve or injection molding runner. Dynisco melt pressure sensors are available with measurement ranges from 0 to 700 bar (10,000 psi), with accuracies to ±0.5% of full scale. Versions include standard flush diaphragm sensors, extended-tip sensors for higher temperature applications and water-cooled sensors for extremely hot polymers.

Dynisco process controllers provide advanced PID control of extruder zones, melt temperature and processing pressure. The Alpha-series controllers are compatible with thermocouple and RTD temperature sensors and offer both analog and digital outputs for controlling heating elements and cooling systems. Multi-zone controllers monitor and regulate multiple extruder segments simultaneously with auto-tune capabilities.

Dynisco pressure transmitters for process installations are calibrated for measurement of melt and process pressures in polymer processing systems. They are available with 4-20 mA, 0-10 V and digital communication outputs for integration into process monitoring systems and SCADA. Special versions for high temperatures (up to 400°C) and high pressures (up to 1000 bar) are available for demanding extrusion applications.

At Verkopershulp.nl you will find the complete Dynisco range with melt pressure sensors, temperature sensors, process controllers and associated accessories. Our technical experts help you select the correct sensor and controller for your specific extrusion or injection molding application.

History

Dynisco was founded in 1952 in the USA and was a pioneer in the development of melt pressure sensors for the emerging plastics processing industry. The company combined precision measurement technology with deep knowledge of polymer processing to develop instruments capable of withstanding the extreme conditions inside extruders and injection molding machines. Over the following decades, Dynisco grew into the global market leader in melt pressure and temperature measurement for the plastics industry. The company has offices and service centers in America, Europe and Asia, and supplies to the world's largest extruder and injection molding machine manufacturers.

Product Categories

  • Actuator
  • Cable
  • Connector
  • Controller
  • Display & Indicator
  • Gauge
  • Meter
  • Pressure Sensor
  • Regulator
  • Relay
  • Sensor
  • Switch
  • Temperature Sensor
  • Transmitter

Applications

  • Melt pressure monitoring in single and twin-screw extruders
  • Process control in injection molding machines
  • Pressure and temperature monitoring in blow molding and calendering
  • Compounding and twin-screw extrusion
  • Film and foil production in the packaging industry
  • Pipe extrusion for technical applications
  • Profile extrusion for construction and automotive
  • Quality control in polymer processing
  • Research and development laboratories for plastics processing
  • Recycling of polymer waste streams
  • Rubber extrusion and calender processes
  • Process optimization in masterbatch production

Frequently Asked Questions

What is the measurement range of Dynisco melt pressure sensors?
Dynisco melt pressure sensors are available in measurement ranges from 0-35 bar to 0-1400 bar (0-500 psi to 0-20,000 psi). The most common range for standard extrusion applications is 0-700 bar. Sensor selection depends on the maximum expected melt pressure in your extruder, with a recommended safety margin of 25%.
Which Dynisco sensor version is suitable for my polymer?
For standard polyolefins and styrenic polymers at temperatures up to 350°C, standard flush diaphragm sensors are suitable. For thermoplastics prone to degradation (e.g. PVC, PVDF), sensors with separating fluid or water-cooled sensors are recommended. For highly filled polymers with abrasive fillers, hardened-tip sensors are available.
How do I install a Dynisco melt pressure sensor?
Dynisco melt pressure sensors are installed in standardized 1/2-18 NPT or M18x1.5 holes in the extruder head or barrel wall. The sensor diaphragm must be flush with the inner channel wall to prevent polymer buildup and material degradation. A bore check with the Dynisco bore-checking tool is recommended for each new installation.
What is the service life of Dynisco melt pressure sensors?
Dynisco melt pressure sensors have a service life of 3 to 10 years under normal use depending on the polymer, processing temperature and avoidance of pressure overloads. Regular verification of sensor response and zero calibration extends service life. Significant deviation from zero or sensitivity indicates replacement or factory recalibration is needed.
Are Dynisco process controllers compatible with standard thermocouples?
Yes, Dynisco Alpha-series process controllers are compatible with thermocouple types J, K, T, E, N, R and S, as well as PT100 RTD sensors. The controller input is configured via the front panel or via RS232/RS485 communication. Automatic cold-junction compensation is built in for thermocouple measurements.
How do I calibrate a Dynisco pressure sensor in the field?
Dynisco offers portable calibration tools for field calibration of melt pressure sensors. Zero calibration is performed with a clean sensor without melt pressure. Span calibration requires a reference pressure source. Dynisco recommends periodic factory calibration (annually) for accurate measurements in quality control processes.
Does Verkopershulp.nl offer technical support for Dynisco products?
Yes, Verkopershulp.nl has technical specialists who help you select Dynisco melt pressure sensors, process controllers and accessories for your specific polymer processing application. We can also advise on sensor bore dimensions and installation requirements.