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Exact, reproducible pressure measurement values can
only be obtained with reliable sensors that measure
precisely. Piezoelectric sensors from Kistler are rugged and
maintenance-free.
Sensors from Kistler offer virtually unlimited service lifetimes;
they deliver highly linear measurement results, and they operate
independently of temperature. They deliver high-precision
measurements of minimal pressure variations (range up to
2,000 bar) and/or temperature changes of up to 300°C.
Cavity pressure can be determined directly, indirectly, contactfree
or together with the contact temperature. Direct-measuring
sensors are in contact with the melt in the cavity, and they
measure the pressure without transmission pins. They can be
installed in a bore with or without an adapter. On many sensors,
Sensors for every measuring task
the front can be adapted to the surface of the cavity so that
no mark can be seen on the part. As an alternative, the force
can be measured behind an ejector pin or measurement pin;
it can then be converted into the pressure with the help of
the pin diameter. This method is recommended if there is
insufficient space for a direct-measuring sensor. For optical
components with Class A surfaces or components on which
marks are not permitted, the cavity pressure can be measured
contact-free with a measuring pin: the compression of the mold
steel is the basis for this method. CAD data is used to simplify
positioning of the sensors in the mold.
