Bently 330130-045-02-05 Extension Cable

I. Overview

• Probe (330130-045-02-05): Adopts a dual-coil eddy current design (to improve the linearity of large-displacement measurement), with a stainless steel housing (AISI 416, strong corrosion resistance), a probe diameter of 0.5 inches (approximately 12.7 mm), a measuring surface coated with tungsten carbide (hardness: HV 2000, wear-resistant), an operating temperature range of -30°C~210°C (high-temperature customized version up to 315°C), a measuring range of 0~45 mil (1 mil = 0.001 inches, approximately 25.4 μm), compatibility with target materials (conductive metals such as steel, cast iron, and aluminum alloy), and a measuring gap of 5~50 mil (to ensure full-range linearity).

• Extension Cable: Standard 10-foot (approximately 3.05 m) low-noise shielded cable (5 ft/20 ft optional), made of fluororubber insulation material (resistant to mineral oil and high/low temperatures of -40°C~200°C), with a shielding layer of double-layer copper mesh + aluminum foil (electromagnetic interference resistance increased by 60% compared to traditional shielding), a characteristic impedance of 50Ω±5%, and a capacitance of ≤100 pF/ft to ensure no attenuation or crosstalk of large-displacement signals.

• Preamplifier: Uses an industrial-grade cast aluminum housing with an IP54 protection rating, an operating temperature range of -20°C~70°C, a supply voltage of -24V DC (±10%), and an output signal of -4V~+4V DC (linearly corresponding to 0~45 mil displacement). It has a built-in fault diagnosis circuit (LED indicators: green = normal, red = fault), supports communication with the 3500 framework, and uploads displacement data and fault information.

II. Technical Parameters

1. Measurement Performance Parameters

2. Environmental Adaptability Parameters

3. Electrical and Connection Parameters

III. Functional Characteristics

1. Accurate Measurement of 0~45 mil Large Displacement, Adapting to Wide-Scenario Requirements

• Wide Range Coverage: The 0~45 mil range can meet the large-displacement monitoring needs of most rotating machinery, such as steam turbine axial movement (usually 0~40 mil) and heavy-duty compressor rotor thermal expansion displacement (0~35 mil). Different devices can be monitored without replacing the probe. In a multi-steam turbine monitoring project of a power plant, one type of probe covers 3 types of units, reducing spare parts inventory costs by 35%.

• Micron-Level Precision: The 0.1 mil (2.54 μm) resolution can capture tiny changes in large displacement. For example, it can accurately identify and output trend data for the 0.5 mil/day displacement increase caused by thrust bearing wear of a 1000 MW steam turbine, providing a basis for bearing life prediction.

• High Linearity: The ±0.2% full-scale linear error ensures that the measurement deviation across the full range is ≤0.09 mil (for 0~45 mil range). In the axial displacement monitoring of a compressor rotor, the deviation between the measured value and the standard value is ≤0.05 mil, which is far better than the ±1% linear error of ordinary large-displacement sensors.

2. Full-Working-Condition Environmental Tolerance, Ensuring Stable Operation in Harsh Scenarios

• High-Temperature and Oil Resistance: The 210°C operating temperature of the probe is suitable for steam turbine bearing boxes (180°C) and compressor cylinders (190°C). The fluororubber cable is resistant to mineral oil and lubricating oil corrosion; in the oil-contaminated environment of a refinery compressor, the cable is used for 4 years without aging or cracking.

• Dust and Water Resistance: The IP67 probe can work normally in a blast furnace blower of an iron and steel plant (dust concentration: 15 mg/m3). Even if sprayed with cooling water for a short time, the large-displacement measurement deviation is still ≤0.1 mil, with no signal interruption.

• Strong Electromagnetic Shielding: The double-layer shielded cable and the EMC design of the preamplifier ensure that the displacement signal has a signal-to-noise ratio (SNR) ≥80 dB near a 10 kV high-voltage frequency converter (with electromagnetic radiation of 30 V/m), with no false fluctuations (the SNR of traditional sensors is only 60 dB), ensuring the reliability of large-displacement data.

• Temperature Compensation: The -30°C~210°C temperature compensation function ensures that the displacement measurement deviation is ≤0.1 mil in outdoor fans in northern winter (-30°C) and high-temperature machine rooms in summer (60°C), avoiding false alarms caused by temperature changes.