Gefran melt sensors are pressure/temperature transducers and transmitters for use in high-temperature environments, able to monitor melt pressure up to 538°c. Based on two main constructive principles, with internal fluid (extensimetric) and fluid free (piezoresistive), they are available in 4 different versions: rigid rod, flexible sheathing, flexible plus thermocouple, and exposed tip. The sensor monitors a full range of pressures: from minimum range of 0-17 bar up to the 0-3000 bar version. Mv/v output signals, 4-20ma, 0-10v, gauge type, can open and atex or factory mutual versions, complete the package of solutions for all architectures and applications used with plastics processing machines. Ce and gost-r approval and high immunity to noise; for better adaptation to problems of electromagnetic disturbance in the field, working temperatures up to 538º c, are the main technical characteristics of gefran melt sensors
m30 m32 m31 m33 w30 w32 w31 w33 k30 k32 k31 k33
filled pressure sensor: extensimetric technology melt pressure transducers and transmitters 02 by analyzing the construction of a filled sensor, it is evident that the structure is designed to transfer media pressure to the transduction part and keep it as far as possible from heat source. The m/w/k/mj series are in the filled sensor family. The hydraulic circuit is composed of a tip with 0. 1 mm internal diameter, at the end of which the contact diaphragm and extensimetric diaphragm are welded. Inside the sensor, a filling fluid with low compression coe f ficient trans fers the pressure . This fluid may be mercury, fda-approved oil, or nak. In all cases, fluid quantity depends on sensor design: the rigid rod contains 30 mm3; flex versions contain 40 mm3. Diaphragm geometries are designed on the basis of the volumes and pressures that come into contact during measurement; the pressure that the media exerts on the contact diaphragm must create a precise deformation of the measurement diaphragm. The measurement element, called extensimeter, is glued to the measurement diaphragm, and converts the physical pressure quantity into an electrical signal. An extensimeter consists of a thin metal wire that is bent and inserted in a flexible insulating material according to a specific geometry. The metal wire (measurement element) is an extra-thin leaf of a metal alloy formed by means of chemical engraving. This special engraving process produces metal grills with specific geometries that have maximum ability to modify their characteristics as they change shape.
fluid-free pressure sensor: impact technology
extrusion applications: safety and performance
injection applications: precision and reading of dynamic pressures
- fluid free (i series) impact
- sodium-potassium (nak) filled (k series)
- oil-filled (w series)
- mercury filled (m series)
- melt for polymers
- melt pressure control systems
- accessories
- mv/v output
- tension output
- 4. . . 20ma output
- hart protocol
- can output
- io-link output
- atex
- plc
- sil2
- sil2-pld