I3 IMPACT fluid free – mV/V output



  • The "IMPACT" series of Gefran, are pressure transmitters, without transmission fluid, for use in high-temperature environments (350°C).
  • Medium pressure is transferred directly to the sensitive silicon element via a thick diaphragm.
  • Strain is transduced by a micro-worked silicon structure (MEMS).
  • The operating principle is piezoresistive. "IMPACT" is Gefran’s exclusive series of high-temperature pressure sensors that use the piezoresistive principle.
  • The main characteristic of "IMPACT" sensors is that they do not contain any transmission fluid.
  • The sensitive element, directly positioned behind the contact membrane, is realized in silicon through microprocessing techniques.
  • The microstructure includes the measurement membrane and piezoresistors.
  • The minimum deflection required by the sensitive element makes it possible to use very robust mechanics.
  • The process contact membrane can be up to 15 times thicker than the membrane used in traditional Melt sensors.


  • Pressure ranges: 0-100 to 0-1000 bar / 0-1500 to 0-15000 psi
  • Accuracy: < ±0.25% FS (H); < ±0.5% FS (M)
  • Standard threading 1/2-20UNF, M18x1.5; other versions on request
  • Other types of diaphragms are available on request
  • Autozero function on board / external option
  • 15-5 PH stainless steel diaphragm GTP+ coated