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Strain gauge pressure transmitter HWF
4-20 mAHART1/2" UNF

Strain gauge pressure transmitter - HWF - GEFRAN - 4-20 mA / HART / 1/2" UNF
Strain gauge pressure transmitter - HWF - GEFRAN - 4-20 mA / HART / 1/2" UNF
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Characteristics

Technology
strain gauge
Output
4-20 mA, HART
Process connection
1/2" UNF
Fluid
for hot-melt
Material
PTFE
Protection level
IP67
Applications
process, melt
Other characteristics
smart, high-temperature, oil-filled
Pressure range

Min.: 0 bar
(0 psi)

Max.: 35 bar
(507.63 psi)

Precision

0.25 %

Process temperature

Min.: 0 °C
(32 °F)

Max.: 315 °C
(599 °F)

Description

Overview
Oil-filled HWF series pressure transmitter with HART communication, designed for melt and other high-temperature process applications. Fluid-filled hydraulic transmission ensures stable measurement at media temperatures up to 315°C. FM-certified options available for hazardous-area installations.

Product name
  • HWF series pressure sensor / transmitter for melt - high-temperature applications


Selected configuration
Order code: HW-F-0-N-H-B35U-1-4-0-P-E-T5-0000000X000X0
  • Output signal: F - 4...20 mA (HART)
  • Version: 0 - Rigid rod
  • Connector: N - NPT Cable
  • Accuracy class: H - 0.25% FS
  • Range: B35U - 35 bar
  • Thread: 1 - 1/2-20 UNF (selected)
  • Rigid rod length: 4 - 153 mm (6”)
  • Flexible rod length: 0 - None
  • Performance Level: P - PL = d
  • Autozero: E - External autozero
  • Tclass / Ambient: T5 (-20°C / +85°C)


Key features
  • Oil-filled hydraulic transmission for thermal stability in high media temperatures
  • HART protocol (smart transmitter functionality)
  • FM approvals available for explosion-proof and dust-ignition-proof installations
  • High accuracy options: < ±0.25% FS (H) and < ±0.5% FS (M)
  • Multiple mechanical interfaces: 1/2-20 UNF, M18x1.5, or flange mounting


Technical description
  • Measuring principle: hydraulic (fluid-filled) pressure transmission to a strain-gauge sensing element
  • Diaphragm: 17-7 PH corrugated diaphragm with GTP+ protective coating
  • Ingress protection and mounting: Type 4X, IP67 for indoor/outdoor hazardous areas
  • Ambient temperature ratings: T5 Ta = -20°C to +85°C; T6 Ta = -20°C to +60°C


Applications & certifications
  • Designed for melt pressure measurement (extrusion, injection molding) and other high-temperature process control
  • FM explosion-proof and dust-ignition-proof certifications for hazardous areas; SIL2 / PLd options available on certified variants


Specifications
  • Product family: HWF (melt / high temperature)
  • Manufacturer: Gefran
  • Example range (selected): 35 bar (B35U)
  • Media temperature capability: up to 315°C (depending on configuration)
  • Output: 4...20 mA (HART)
  • Accuracy classes: H = 0.25% FS; M = 0.5% FS
  • Typical mounting options: rigid rod, rigid+flexible rod, thermocouple, exposed capillary, flange

Catalogs

Exhibitions

Meet this supplier at the following exhibition(s):

Intermat 2027
Intermat 2027

21-24 Apr 2027 Paris (France)

  • More information

    Other GEFRAN products

    Pressure sensors

    *Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.