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.

Downloads for MX4

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

Certifications for MX4

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