Protran PR3920®

Subsea Differential
Pressure Transmitter• Silicon-on-Sapphire sensor technology
for outstanding performance• Standard sensing range 0-50 bar DP• 690 bar line pressure• 1,200 bar secondary containment• Submersion to 3,000 metres sea level• High accuracy option• NACE corrosion resistance• Hyperbaric testing and Environmental
Stress Screening (ESS Testing)• ATEX/IECEx option available(includes M1 for mining applications)Vers. 20/1/Eng

Protran ® PR3920 Subsea Differential Pressure Transmitter
Technical DataDescription
The PR3920 differential pressure transmitter
provides very accurate low pressure wet-wet
differential pressure measurement on extremely
high line pressure sources. Designed forpermanent installation in very demanding subsea
applications the housing is completely sealed toresist 300 bar external pressure. Intended forsubmersion in pressurised dielectric oil withseawater for monitoring of subsea well control
valves or hydraulic pressure measurement.

outstanding insulation properties, the sapphire substrate allows
the sensor to operate over a very wide temperature range
without loss of performance.

The unique Silicon-on-Sapphire sensor technology provides
outstanding performance and gives excellent stability overa wide temperature range. The advanced sensor design
consists of a piezoresistive silicon strain gauge circuit, which isepitaxially grown onto the surface of a sapphire diaphragm toform a single crystalline structure.The sapphire sensor element
is then molecularly bonded to a titanium alloy sub-diaphragm.
This enables the sensor to endure higher over- pressures andprovides superb corrosion resistance. The sensor exhibits
virtually no hysteresis and excellent long-term stability. WithThe PR3920 pressure transmitter provides surface mounting
with a stainless steel mounting plate and dual redundant o-ringface seals. Both the high and low pressure ports can withstand
1,000bar overpressure with no damage or loss of performance.
The titanium alloy wetted parts provide conformance to NACE
corrosion resistance requirements. Electrical connection is via
a heavy duty PTFE cable with optional angle of orientation.
Output signal is a 4-20 mA, 2 wire current loop which canbe powered from and external 10-36 Vdc supply. Application
includes control of chemical injection for sub-sea wells for oiland gas extraction.
An optional ATEX and IECEx approved version of this productis available for explosion protection for flammable gases (zone0), dusts (zone 20) and mining areas (group I M1).

Dimensions(in mm)ELECTRICAL CONNECTION

69.0
Colour
RedBlue

Function
Supply (10-36Vdc)
Signal (4-20mA)
11,261.00

Protran ® PR3920 Subsea Differential Pressure Transmitter
Technical Data
TypeSensor Technology:

PR3920Silicon-on-Sapphire (SoS)

Output Signal:

4-20 mA (2 wire)

Supply Voltage:

10-36 VDC

Pressure Reference:

Differential Sealed Gauge

Protection of Supply Voltage:

Protected against supply voltage reversal up to 50 V

Differential Pressure Range:

0-750psi (51 barDP)

Overpressure Safety:

1.5x maximum static line pressure for all ranges

Secondary PressureContainment:

1,200 bar max

Common Mode (Static linepressure):

To both ports simultaneously 690bar with less than 1%FS change on output signal.

Load Driving Capability:

4 – 20 mA: RL < [UB - 10 V] / 20 mA; (e.g. with supply voltage (UB) of 36V, max. load (RL) is 1300 Ω)

Accuracy NLHR:≤ ±0.25 % of span BFSL

Zero Offset and Span Tolerance:±0.20 mA

Operating Ambient Temperature:-10°C to +70°C (+14 °F to +158 °F)

Operating Media Temperature:-10°C to +70°C (+14 °F to +158 °F)

Storage Temperature:+5 °C to +40 °C (+41 °F to +104°F) Recommended Best PracticeTemperature Effects:±3.0% FS total error band for -20°C – +70°C. Typical thermal zero and span coefficients ±0.05% FS/ °C

ATEX/IECEx Approval Option:

ATEX/IECEx Safety Values:

Electromagnetic Compatibility:

Ex II 1 G Ex ia IIC T4 Ga (zone 0)
Ex II 1 D Ex ia IIIC T135°C
Da (zone 20)
Ex I M 1 Ex ia I Ma (group 1 M1)
Ui = 28 V
Ii = 119 mA
Pi = 0.65 W
Li = 0.1 µH
Ci = 74 nF
Temperature Range = -20°C – +70°C
Max. cable length = 45 m
Emissions: EN61000-6-4; Immunity: EN61000-6-2; Certification: CE Marked

Insulation Resistance:> 1GΩ @ 50 VDC

Response time 10-90 %:1 mS

Operating Environment:

Sealed for immersion in pressurised dielectric fluid up to 300bar and for short periods in seawater.

Wetted Parts:

SAE 316 stainless steel and titanium alloy

Pressure Media:

All fluids compatible with SAE 316 stainless steel and titanium alloy

Corrosion Resistance:

NACE compliant materials

Pressure Connection:

Face sealing mounting plate with dual redundant elastomeric O ring seals on both pressure ports.

Electrical Connection:

Raychem wire (optional cable outlet orientation available on request)

Net. Weight (Kg):

Subject to specification

DISCLAIMER : ESI Technology Ltd operates a policy of continuous product development. We reserve the right to change specification without
prior notice.All products manufactured by ESI Technology Ltd are calibrated using precision calibration equipment, traceable to national
measurement standards.