Main features & Overview


The M6 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).

The M6 Series has an improved digital readout utilizing an extra-large five-digit display.

The M6 Series melt pressure gauge provides reliable, maintenance-free, localized pressure indication.

The small capillary tube filled with a special medium isolates the gauge housing from potential thermal damage.


  • Better than ±0.50% FS (M) accuracy
  • Economically priced
  • 2 times overload capacity
  • 1/2-20 UNF thread standard, M18x1.5 also available
  • One alarm standard
  • 4-20 mA retransmission standard
  • 15-5 stainless steel diaphragm with Armoloy coating standard (others available upon request)
  • 17-7 PH corrugated diaphragm with TiN (Titanium Nitride) coating for ranges below 100 bar (1500 psi)


Gefran product range brochure
Melt pressure sensors
M6 datasheet
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