![]() ![]() The capacitance of this type just like the fiat-plate type is proportional to the area. A secondary isolating diaphragm is used to protect the sensing diaphragm.Īnother type of capacitor uses concentric hollow metal cylinders. This is shown in Figure, where the movement of a flexible diaphragm relative to a fixed plate is sensed by the capacitance change. ![]() This imbalance is detected in a capacitance bridge circuit and converted to a D.C. The capacitance pressure sensor operates on the principle that, if the sensing diaphragm between two capacitor plates is deformed by a differential pressure, an imbalance of capacitance will occur between itself and the two plates. The reduced movement very nearly eliminates drift, friction and hysteresis common to bellows, diaphragm and bourdon elements that require relatively large movements. This is due in part to the accuracy of their electronic circuitry and in part to the extremely small movement required to the elastic elements in order to obtain the needed electrical change. ![]() Generally, electrical pressure detectors are more accurate and have much faster response times. Most electronic pressure sensors incorporate different elements as the primary pressure detector, and it is used to vary a measurable electrical quantity to produce a proportionately variable electronic signal.īecause the energy form is transferred from a mechanical to an electrical nature, these devices are often classified as transducer. Depending on the version, the multi-channel connectors also have insulation displacement contacts for the single wire cable (version S) and mini coax female connectors for the mini coaxial cable (version C).Electronic Pressure Transmitters / Sensors Principle Meusburger says the signals from 4 to 8 cavity pressure sensors can be combined with minimum cabling effort. The company’s offering of matching E 6763 multi-channel connectors, enables high process reliability during mold changes via a mold recognition chip integrated on the circuit board, and easy sensor data identification. With a cable diameter of 1.9 mm, the coaxial wire is less flexible, but less prone to kinking, and is available in consecutive lengths from 200 to 1,000 mm. With Meusburger’s mini coaxial version, several sensor signals can be combined on one multi-channel connector. The E 6757 coaxial cable is characterized by optimal shielding against external signals due to its steel sheath, making it ideal for molds with a high number of electrical components such as hot runner components or monitoring equipment, or if the cable is routed outside of the mold. Installation is effortless as a result of the insulation displacement connector on the multi-channel connector. ![]() Available in lengths of 2,000 and 5,000 mm, the single wire variant allows for shortening if required. The wire can be routed flexibly with minimal bending radii, but may kink if not careful. With a cable wire diameter of 1.2 mm, the single wire cable is ideal for molds with limited space. In addition to its existing range of cavity pressure sensors for plastic injection molding process monitoring, Meusburger now offers two charge transfer versions, the single wire E 6760 and the E 6757 mini coaxial cables, as well as matching multi-channel connectors for optimal process quality and increased part sustainability. ![]()
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