M7 PLc Mercury filled – Voltage output – PLc

M7 PLc


The M7 PL ‘c’ series of Gefran, are pressure transmitters for use in high-temperature environments 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 equipment for R&D purposes according to the European Directive 2011/65/EU.

  • The M7 Performance Level ‘c’ Series are pressure sensors for use in high-temperature applications where the process temperatures may reach 400°C (°F) such as high-temperature engineered polymers.
  • The K Series utilizes standard melt pressure principles and construction; strain sensing technology is bonded foil strain gauge.
  • A near incompressible liquid (mercury) is used for pressure transmission.


  • Performance Level PL ‘c’
  • Pressure ranges from: 0-35 to 0-2000 bar / 0-500 to 0-30000 psi
  • Accuracy: < ±0.25% FSO (H); < ±0.5% FSO (M)
  • Fluid-filled system for temperature stability
  • Mercury filling volume: M70 (30mm3); M71, M72 (40mm3)
  • 1/2-20UNF, M18x1.5 standard threads; other types available on request
  • Autozero function on board / external option
  • Standard diaphragm is 15-5 PH stainless steel with GTP coating
  • 17-7 PH corrugated diaphragm with GTP coating for anges below 100 bar-1500 psi