The HWX series of Gefran are pressure transmitters with HART communication protocol for using in high temperature environment with explosive atmosphere presence.

The main characteristic of this series is the capability to read temperature of the media up to 315°C.

The constructive principle is based on the hydraulic trasmission of the pressure.

The fluid-filled system assures the temperature stability.

The physical measure is transformed in a electrical measure by means of strain-gauge technology.


  • Pressure ranges from: 0-17 to 0-1000 bar / 0-250 to 0-15000 psi
  • Accuracy: < ±0.25% FS (H); < ±0.5% FS (M)
  • Fluid-filled system for temperature stability
  • Oil filling volume: HWX0 (30mm³); HWX1, HWX2, HWX3 (40mm³)
  • 1/2-20UNF, M18x1.5 standard threads; other types available on request
  • Autozero function on board / external option
  • 17-7 PH corrugated diaphragm with GTP+ coating


General Overview
Sensori di pressione di Melt
4.0 Gefran product catalog
4.0 plastic application catalogue
Flyer Melt for Polymers
HWX datasheet
80638 Safety Note HMX-HWX EAC Ex012
Nota di sicurezza HMX, HWX
Product user manual
H pressure transmitter description file
H pressure transmitter description files for HH475


Hart Certifications - Certificate of Registration HCF Verified
GTP+ FDA Certificate
ATEX Certifications - ATEX for pressure or temperature transmitters HART series HMX, HWX, HIX, AX
EU Conformity declaration_HWX PL=c
EU Conformity declaration_HWX
Certificazione performance level 'C' serie HME/HMX,HWE/HWX,HKE
EAC Generic Conformity Certificate