BEI Edcliff Instruments Division
Unique products
Applications
Contact factory or local sales representative for outline drawings
of the various configurations and the electrical pinouts.
Downhole Potentiometric
Pressure Transducer
Features
Model 2-48
Downhole Pumping
Drilling
Zone Isolation Tools
Mud Logging
Well Stimulation
Perforating
Acid & Chemical Fracturing
Operates at +200°C
Exceptional Long-Term Stability
Small Size (1/2” outside diameter x 1.50 LG.)
The Model 2-48 is specifically designed for use in downhole
applications. Its small size (1/2” O.D.) and rugged high
temperature and high pressure construction are ideal for well
logging, pumping, MWD, and other applications that require
a small, accurate, robust pressure sensor .
The Model 2-48 operates in +200°C (+400°F), hydraulic or
formation fluid environments at pressures up to 30,000 psi.
The Model 2-48 utilizes a Ni-Span-C helical Bourdon tube to
drive a wiper across a conductive thick-film resistive element
which creates a voltage divider that can provide an electrical
output directly proportional to the pressure applied.
The exterior wall of the Model 2-48 is vented to the environ-
ment through four holes covered by a 70µ filter element to
protect the interior mechanism from particulate matter . This
permits the Model 2-48 to be used as a differential pressure
device as well as a static pressure sensor.
The helical Bourdon tube and thick-film resistive element are
designed on an Advanced Finite Element modeling tool and
then extensively tested to validate the performance and
reliability of the device.
Model 2-48 Downhole Potentiometric
Pressure Transducer
13100 Telfair Avenue Sylmar, C A 91342-3573
(818) 362-7151 Fax: (818) 362-2487
E-mail: sales@beipressure.com
A Subsidiary of BEI TECHNOLOGIES, INC.
PERFORMANCE
OUTPUT SIGNAL Voltage Divider
ZERO & SPAN 100 mVDC @ 200°C
OFFSETS
ACCURACY ±2.0% of FSO @ 200°C (BFSL)
L,H & R
LONG-TERM ±1.5% FSO/Year
STABILITY
COMPENSATED 21° to +200°C (71° to +400°F)
TEMPERATURE
RESISTANCE 2000 Ohms standard. Other
resistances are also available.
Contact factory for information
OPERATING
INPUT POWER 5 OR 10 VDC
INSULATION 50 MEGOHMS @ 500 VDC
RESISTANCE
DIELECTRIC 500 VAC, 50-60 Hz, 5 mA MAX,
STRENGTH 1 MIN.
RESOLUTION Infinite
PROOF PRESSURE 150% of Rated Range
BURST PRESSURE 200% of Rated Range or 30,500 PSI
ENVIRONMENTAL
OPERATING LIFE 250,000 Full Scale Cycles
WETTED PARTS 316 Cres & Ni-Span-C
ENCLOSURE Open to Environment
VIBRATION 15 g’s 10-2000 Hz
SHOCK 100 g’s for 11 Milliseconds, Half-sine
CERTIFICATIONS
Ordering Information
2 - 48 X - XX X X - XX
INSTRUMENT
FAMILY
2 = Potentiometric
SENSOR TYPE
48 = Bourdon Tube
Driven 1/2” DIA Case
RESISTANCE ELEMENT
0 = 2000 OHMS
1 = 5000 OHMS
2 = 7500 OHMS
3 = 10,000 OHMS
PRESSURE RANGES
0 = 5,000 PSI
1 = 6,000 PSI
2 = 7,500 PSI
3 = 10,000 PSI
4 = 15,000 PSI
5 = 20,000 PSI
6 = 25,000 PSI
7 = 30,000 PSI
PRESSURE FITTINGS
0 = 1/8NPT, Male
1 = 7/16-20UNJF-2A SAE Male
ELECTRICAL CONNECTIONS
0 = J-Hooks
1 = 3-Wire Pigtails
CUSTOM CONFIGURATIONS
00 = No Custom Requirements
Product Specifications
IAW ANSI/ASA S37.1-75
DOC 128788 (09/98)
PRELIMINARY
