MELT PRESSURE SENSORS

Over fifty years of experience, an organisation with a strong focus on the customer's needs and constant technological innovation have made Gefran a benchmark in the design and production of sensors, systems and components for industrial process automation and control. Expertise, flexibility and process quality are the factors that distinguish Gefran in the production of integrated tools and systems for specific applications in various industrial fields, with consolidated know-how in the plastics, mobile hydraulics, heating and lift sectors. Technology, innovation and versatility represent the...

MELT PRESSURE SENSORS MELT PRESSURE TRANSDUCERS AND TRANSMITTERS KEY ADVANTAGES OF USE OF MELT PROBES The high temperature melt pressure transducer is an electronic device that transforms a physical variable (pressure) into an electrical signal (current or voltage or in Can Open, IO-LINK, HART), acquired by the various control, measurement and regulation devices. Use of melt probes is indispensable in extrusion processes as they contribute: GEFRAN melt sensors are pressure/temperature transducers and transmitters designed for use in environments that reach very high temperatures, capable of detecting...

MELT PRESSURE SENSORS APPLICATION SECTORS POLYMER PRODUCTION INJECTION-BLOW MOULDING HOT MELT (GLUE DOSING) THERMODYNAMIC CONCENTRATED SOLAR POWER CSP INSTALLATIONS Gefran melt pressure probes in different mechanical versions with rigid or flexible stems and exposed capillaries permit suitable installation at the exact point where it is necessary to detect the pressure and temperature of the molten medium, both in traditional extrusion plants and in potentially explosive areas.

MELT PRESSURE SENSORS THICK FILM ON STEEL WITH FILLING FLUID TECHNOLOGY Gefran uses one of the most widespread and proven existing measurement principles, the so-called “Wheatstone Bridge”. There are a number of different technologies for making the sensitive element on the basis of this principle. FULLY FLUID-FREE PIEZORESISTIVE TECHNOLOGY The innovative IMPACT sensors (series I) are pressure transmitters, without transmission fluid, in which the medium pressure is transferred directly to the silicon sensing element through a thick membrane. The transduction of the physical stress is entrusted...

BEYOND TECHNOLOGY MEMBRANE COATING IN CONTACT WITH GTP+ MELT PRESSURE SENSORS SELF-COMPENSATION The innovative GTP+ coating, the result of Gefran's research, guarantees a longer life for Gefran melt pressure sensors thanks to: • Great hardness • Remarkable resistance to high temperatures Through the SP option, internal self-compensation, K/W/M series transmitters cancel the effect of pressure signal variation caused by melt temperature variation. In this way, the reading error caused by heating of the filling fluid (typical in filled sensors) is reduced to a minimum. In melt pressure probes with...

BEYOND TECHNOLOGY WIDE RANGE OF PRODUCTS ONE FOR EACH APPLICATION FLEXIBLE WITH THERMOCOUPLE PRODUCTION OF POLYMERS MELT PROBES WITH ADAPTERS AND FLANGES Gefran also manufactures melt pressure probes with dedicated flanges, made to measure for plastic polymer production plants. Gefran was the first company to create a probe for this sector complete with Atex and SIL2 or PLd certifications featuring the HART digital communication protocol, dedicated mechanical flanges and IMPACT fluid free technology.

MELT PRESSURE SENSORS DIGITAL COMMUNICATION IN IO-LINK Digital solutions for the transmission of values measured in plastics production are becoming increasingly important. IO-Link is the worldwide standard for connecting sensors and actuators. Thanks to this technology, melt probes with IO-Link output are able to measure not only the pressure but also the temperature of the extruded material, for example by storing the maximum pressure and temperature peaks and hours of operation under pressure. This allows the user to recognize in real time when the system is operating improperly or when the...

BEYOND TECHNOLOGY FLUID-FREE IMPACT PRESSURE TRANSDUCERS PRINCIPAL TECHNICAL PROPERTIES IO-LINK OUTPUT HART+ATEX VERSION ATEX VERSION HART VERSION MELT PRESSURE SENSORS OUTPUT IN CURRENT OUTPUT IN VOLTAGE OUTPUT MV/V

BEYOND TECHNOLOGY MELT PRESSURE TRANSDUCERS PRINCIPAL TECHNICAL PROPERTIES FILLING WITH NAK (SODIUM POTASSIUM) MELT PRESSURE SENSORS FILLING WITH NAK (SODIUM POTASSIUM) FILLING FLUID

BEYOND TECHNOLOGY MELT PRESSURE TRANSDUCERS PRINCIPAL TECHNICAL PROPERTIES FILLING WITH DIATHERMIC OIL MELT PRESSURE SENSORS Thick film of sensitive element deposited on steel membrane Electronic Case: • AISI 304 stainless steel Stem: • 17-4 PH Plastics extrusion Mercury-free applications in the food sector Diathermic oil (FDA approved) FDACFR 178.3620 and CFR 172.878 Diathermic oil (FDA approved) FDACFR 178.3620 and CFR 172.878 Diathermic oil (FDA approved) FDACFR 178.3620 and CFR 172.878 Thick film of sensitive element deposited on steel membrane Electronic Case: • AISI 304 stainless steel...

BEYOND TECHNOLOGY MELT PRESSURE TRANSDUCERS PRINCIPAL TECHNICAL PROPERTIES RIEMPIMENTO CON MERCURIO ILM0 MELT PRESSURE SENSORS MD HME HART PLd & SIL2 HMX HART ATEX PLd & SIL2

BEYOND TECHNOLOGY MELT PRESSURE TRANSDUCERS PRINCIPAL TECHNICAL PROPERTIES MELT PRESSURE MANOMETERS MELT PRESSURE SENSORS SELECTION GUIDE OF THE MEMBRANE IN CONTACT WITH THE EXTRUDED POLYMER W62

MELT PRESSURE SENSORS MATCHING PRODUCTS SAFETY DEVICES GRD BURSTING DISCS The bursting disc, also known as the bursting cap, is an entirely mechanical device designed to yield at a given pressure. Mounted on the extruder, it prevents dangerous and sudden increases in pressure inside the machine by breaking to allow the pressure to be released. An accuracy of ± 0.5% and a vast pressure range make the GRD a valid complement to traditional control devices, especially in emergency conditions where very rapid intervention is required. Process connection: 1/2 20 UNF Tip size: 8mm Main features: Maximum...