Products Description
The Bently Nevada 129957-085-310-05 is a high-performance extension cable specifically engineered for the 3300 XL 8mm eddy current proximity probe system, serving as the critical "signal transmission bridge" between the probe and Proximitor preamplifier. As a core connectivity component under Baker Hughes' Bently Nevada brand, it addresses the industry challenge of "limited probe cable length in large equipment installations" with its 8.5-meter standard design, enabling flexible routing between probes installed in harsh zones (e.g., high-temperature turbine casings) and preamplifiers located in controlled environments.
Technical specifications
Manufacturer : Bently Nevada
Product No. : 129957-085-310-05
Product Type : 3300 XL 8mm Extension Cable
Made in U.S.A
System Role: Maintains 50 Ω impedance
Cable length: 8.5 ft (2.59 m)
Armour option: FEP jacket
Characteristic Impedance：50 Ω ±2 Ω
Capacitance：98 pF/m (30 pF/ft)
Attenuation：< 0.28 dB/m @ 10 MHz
Withstand Voltage：2 kV AC shield-to-conductor
Functional Characteristics
⚙️ Low-Loss Signal Transmission
The 75-ohm triaxial design and precision manufacturing ensure signal attenuation ≤0.1dB/10m across the 0.5Hz-100kHz frequency range. In a 9-meter system (0.5m probe cable + 8.5m extension), it maintains the 3300 XL system's 7.87V/mm sensitivity accuracy within ±5% .
⚙️ Wide-Temperature Adaptability
The FEP insulation and rugged jacket enable stable performance from arctic -51°C LNG pump environments to +177°C steam turbine casings, eliminating signal degradation caused by temperature fluctuations .
⚙️ EMI/RFI Immunity
The triaxial shielding layer with ≤0.1Ω ground resistance blocks electromagnetic interference from variable frequency drives and high-voltage equipment. In steel mill environments, signal SNR remains ≥65dB, preventing false alarms .
⚙️ Chemical & Mechanical Durability
The fluoropolymer jacket resists oil, acid, and solvent corrosion, while the flexible yet robust construction tolerates repeated bending (minimum bend radius: 30mm) during installation and equipment operation .
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