October 10, 2012 -Dynisco announces Vertex melt-pressure sensor for plastics extruders. Vertex is ideal for all plastics extrusion applications, including those in food, pharmaceutical and medical. The technology lies at the tip of the sensor, where melt pressure is registered directly through a single, more robust diaphragm. Direct measurement eliminates errors that can arise in sensors with complicated internal structures, transmission fluids and moving push rods. The Vertex diaphragm is much thicker than the diaphragms in other sensors and is made of tough Inconel 718 alloy, which provides a higher level of corrosion resistance than stainless steel.
For added protection against abrasion and corrosion, the tip is coated with a diamond-hardened DyMax coating. The sensor wall structure has also been fortified to handle side stresses. The thickness of the diaphragm and materials of construction make for a highly robust device that can be expected to outperform and outlast other sensors available, and is covered by a 4-year warranty.
Faster processes and controls demand faster sensing measurements, and so the Vertex sensor is many times faster than its traditional sensors. Accuracy, as defined under the ISA-S37.1 standard, is pegged at ±0.25% full scale over standard pressure ranges of 1500, 3000, 5000, 7500 or 10,000psi.
Vertex sensors are available with 3.33mV/V or 4-20mA output signals and are designed to work with universal pressure indicators. J--type thermocouples are available to provide a melt temperature signal. The process connection is 1/2-20 UNF (with 45° conical seat) for installation in standard transducer mounting holes. Vertex is very environmentally friendly.
Thanks to direct sensing technology, it contains no mercury, no NaK, no oil, no Gallium – in fact, there is no fill material of any kind. There is nothing to leak and no disposal concerns. It is also fully compliant with the European RoHS directive. With a longer design life, Vertex also contributes to waste-stream reduction. .
