Gefran W3 SERIES Specification Sheet

OIL-FILLED
MELT PRESSURE TRANSDUCERS
W3 SERIES mV/V output

The W3 series of Gefran, are pressure transducers for
using in High temperature environment.
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 phisical measure is transformed in a electrical mea­sure by means the strain-gauge technology.

MAIN FEATURES

• Pressure ranges from:
0-35 to 0-1000 bar / 0-500 to 0-15000 psi

• Accuracy: <±0.25% FSO (H); <±0.5% FSO (M)

• Fluid-filled system for temperature stability

• Oil filling meets FDA requirements CFR 178.3620 and
CFR 172.878

• Oil filling volume:
W30 (30mm3); W31-W32-W33 (40mm3)

• 1/2-20UNF, M18x1.5, standard threads; other types avai­lable on request

• Standard diaphragm is a 17-7 PH stainless steel GTP+
coating corrugated diaphragm

GTP+ (advanced protection)
Coating with high resistance against corrosion, abrasion
and high temperature

TECHNICAL SPECIFICATIONS

Accuracy (1)

Resolution

Measurement range

Maximum overpressure

Measurement principle

Supply voltage

Strain gage bridge resistance

Isolation resistance (at 50Vdc)

Full Scale Output (FSO)

(toll. 0.5% FSO)

Zero balance

Calibration signal

Strain gauge housing compensated tem­perature range

Maximum housing temperature range

Thermal drift in compensated range
Zero/Calibr./Sens.

Diaphragm maximum temperature

Zero drift due to change in process
temperature

Standard Material in contact
with process medium

Thermocouple (model W32)

Protection degree (with 6-pin mating

connector)

Electrical connections

H <±0.25%FSO (350...1000 bar)
M <±0.5%FSO (35...1000 bar)

0..500 to 0..15000psi

1.5 x FS above 500bar/7500psi

Strain gage Wheatstone bridge

6..12Vdc (10Vdc typical)

(550 Ohm below 100bar - 1500psi)

3.33 mV/V (option 3)

Diaphragm:

• 17-7PH corrugated diaphragm
with GTP+
Stem

• 17-4 PH

STD : type “J” (isolated junction)

6-pin Conn. VPT07RA10-6PT

(PT02A-10-6P)

8-pin Conn. PC02E-12-8P

Infinite

0..35 to 0..1000bar

2 x FS

350 Ohm

>1000 MOhm

2.5 mV/V (option 2)

±0.5%

80% FSO

0...+100°C

32...212°F

-30...+120°C

-22...250°F

< 0.02% FSO/°C
< 0.01% FSO/°F

315°C

600°F

0.04 bar/°C

30 psi/100°F

IP65

FSO = Full Scale Output
(1) BFSL method (Best Fit Straight Line): includes combined effects of Non­Linearity, Hysteresis and Repeatability