Bently Nevada 18745-04

Description

Basic Identification Parameters

• Brand: Bently Nevada (Baker Hughes Group)
• Exact Model: 18745-04
• Product Series: 7200 Series
• Product Category: Eddy Current Proximitor / Probe Signal Conditioner
• Origin: United States
• Standard Warranty: 12 months original factory warranty
• Compatible Probe: 7200 Series 5mm Eddy Current Proximity Probe
• Matching Extension Cable Length: 9 meters
• System Compatibility: 3300 Series, 3500 Series, 9000 Series Machinery Protection Systems

Electrical & Power Supply Specifications

• Operating Power Supply: -18 VDC to -24 VDC negative DC power supply
• Typical Operating Current: ≤25 mA
• Maximum Loop Load Resistance: 500 Ω
• Standard Output Signal: DC voltage analog signal
• Built-in Oscillation Frequency: 30 kHz eddy current oscillation frequency

Measurement & Performance Specifications

• Measurement Principle: Non-contact Eddy Current Induction Technology
• Valid Linear Measuring Range: 0–2 mm (0–80 mils)
• Standard Sensitivity: 200 mV/mil (7.87 mV/μm)
• Frequency Response Range: 0 Hz (DC) – 10 kHz, flat amplitude response
• Full-Scale Linearity Error: ≤0.85% FS
• Hysteresis Error: ≤0.01% FS
• Overall Measurement Accuracy: ±0.5% Full Scale
• Static Gap Resolution: 0.1 μm
• Dynamic Vibration Response Time: ≤5 ms
• Effective Probe Working Gap Range: 0.5–2.0 mm

Mechanical & Environmental Specifications

• Enclosure Protection Grade: IP65 dustproof and waterproof
• Housing Structure: Fully epoxy potted sealed integrated structure
• Housing Material: Industrial flame-retardant engineering plastic + metal shielding base
• Mounting Method: DIN rail mounting / panel screw fixed mounting
• Overall Dimensions: 81.3 mm × 61.2 mm × 63.5 mm
• Product Weight: 0.23 kg
• Operating Temperature Range: -25°C to +96°C
• Storage Temperature Range: -40°C to +105°C
• Operating Humidity: 0–95% RH, non-condensing
• Anti-vibration Performance: 15 g RMS, 10–2000 Hz
• Electromagnetic Compatibility: Compliant with EN 61000-6-2, EN 61000-6-3 industrial EMC standards

Certifications & Compliance

• Industry Standard Compliance: API 670 Machinery Protection Standard
• Safety Certifications: CE, CSA Division 2 Hazardous Area Compliance

Core Functional Features

1. Dedicated 5mm Eddy Current Signal Conditioning

   Professional signal processing circuit optimized for 5mm probes, accurately separating static DC gap position signal and dynamic AC vibration signal, realizing simultaneous monitoring of shaft axial displacement and radial vibration.

2. Ultra-High Linear & Low Noise Performance

   Excellent linearity and ultra-low signal noise, capturing micron-level tiny rotor displacement changes, accurately reflecting early mechanical wear and fault signs.

3. Complete System Compatibility

   Directly compatible with all Bently Nevada 3300/3500/9000 TSI machinery protection racks, no additional conversion modules required, plug-and-play signal connection.

4. Fully Sealed Anti-Harsh Environment Design

   Epoxy potting sealed structure, resistant to oil mist, dust, corrosion and high humidity, stable long-term operation in unattended industrial sites.

5. Quick Locking Cable Connection

   Adopts ClickLoc gold-plated coaxial locking connector, supports quick plug/unplug of probe and extension cable, reduces on-site maintenance and replacement time.

6. Built-in Fault Diagnosis Protection Circuit

   Automatically detects probe disconnection, cable damage and abnormal power supply status, outputs safe fault state signal to avoid false alarm and false interlock actions.

7. Stable Fixed Sensitivity Calibration

   Factory calibrated fixed sensitivity (200mV/mil), no on-site repeated calibration needed, ensures consistent measurement data across the whole service life.

Main Application Scenarios

1. Thermal Power Generation Industry

   Axial thrust position, differential expansion and radial vibration monitoring for steam turbine rotors, generator shafts, bearing pedestals and auxiliary turbine machinery.

2. Oil & Natural Gas Industry

   Non-contact shaft displacement and vibration monitoring for offshore platform compressors, gas turbines, oil pipeline pump units and gas transmission station rotating equipment.

3. Petrochemical & Chemical Industry

   Health monitoring of centrifugal compressors, reciprocating compressors, large centrifugal pumps, fan main shafts and reaction kettle drive rotating machinery.

4. Heavy Metallurgy & Manufacturing Industry

   Vibration and shaft position monitoring for large rolling mill main shafts, high-speed centrifuges, heavy-duty industrial motors and generator units.

5. Water Conservancy & Municipal Industry

   Rotor position and vibration monitoring for large circulating water pumps, drainage pump stations and hydraulic turbine units.

6. Equipment Retrofit & Maintenance Projects

   Original spare replacement and upgrade of old 7200 series proximitors, realizing seamless continuation of original machinery protection monitoring functions.