Model 2-48 Downhole Potentiometric Pressure Transducer BEI Edcliff Instruments Division 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 +200C (+400F), 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 environment through four holes covered by a 70 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. U n i q u e products Applications Downhole Pumping Drilling Zone Isolation Tools Mud Logging Well Stimulation Perforating Acid & Chemical Fracturing Features Operates at +200C Exceptional Long-Term Stability Small Size (1/2" outside diameter x 1.50 LG.) Contact factory or local sales representative for outline drawings of the various configurations and the electrical pinouts. Model 2-48 Downhole Potentiometric Pressure Transducer Product Specifications IAW ANSI/ASA S37.1-75 Ordering Information PERFORMANCE OUTPUT SIGNAL Voltage Divider ZERO & SPAN OFFSETS 100 mVDC @ 200C ACCURACY L,H & R 2.0% of FSO @ 200C (BFSL) LONG-TERM STABILITY 1.5% FSO/Year COMPENSATED TEMPERATURE 21 to +200C (71 to +400F) RESISTANCE 2000 Ohms standard. Other resistances are also available. Contact factory for 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 OPERATING INPUT POWER 5 OR 10 VDC INSULATION RESISTANCE 50 MEGOHMS @ 500 VDC DIELECTRIC STRENGTH 500 VAC, 50-60 Hz, 5 mA MAX, 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 PRESSURE 0 = 5,000 1 = 6,000 2 = 7,500 3 = 10,000 4 = 15,000 5 = 20,000 6 = 25,000 7 = 30,000 RANGES PSI PSI PSI PSI PSI PSI PSI 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 CERTIFICATIONS PRELIMINARY 13100 Telfair Avenue Sylmar, CA 91342-3573 (818) 362-7151 Fax: (818) 362-2487 E-mail: sales@beipressure.com DOC 128788 (09/98) A Subsidiary of BEI TECHNOLOGIES,INC.