Main features & Overview


The MX4 series of Gefran, are pressure transmitters for using in High temperature environment and specifically designed for melt pressure measurement and available only to be used in large-scale fixed installations or in large-scale stationary industrial tools, typically extruders, or for laboratory B2B equipments for R&D purposes according to the European Directive 2011/65/EU (see informative note RoHS II).


  • Pressure ranges: 0-25 to 0-2000bar / 0-360 to 0-30000psi
  • Extensometric measurement principle with Wheatstone bridge
  • Precision: < ±0.25% FSO (H); < ±0.5% FSO (M)
  • Calibration signal 80% FSO internally generated
  • Protection level: IP65 (6-pin connector)
  • Flange Mounting
  • Standard diaphragm is 15-5 PH stainless steel with GTP coating
  • 17-7 PH corrugated diaphragm with GTP coating for ranges below 100 bar-1500 psi

Further versions available on request.


Gefran product range brochure
Melt pressure sensors
MX4 datasheet
MX4, WX4 safety notes
Manual of electrical installation for pressure probes
User’s Manual – Pressure Sensors for high temperature
RoHS informative note
Kunstoffemagazine 12/2010: Schmelzedruckmessung mit neuem Impuls


ATEX Certifications - CESI 02 ATEX 107 Certificate
ATEX Certifications - Extension 01-07 CESI 02 ATEX 107
GTP+ FDA Certificate
EAC Generic Conformity Certificate