Product Short Description
330850-50-00 is a dedicated high-precision signal conditioning proximitor module from Bently Nevada 3300 XL 25 mm transducer series, professionally designed for steam turbine differential expansion axial displacement measurement. It serves as the core signal processing unit matching 33085 series 25 mm differential expansion proximity probes and triaxial extension cables. This product adopts advanced active eddy current oscillation demodulation technology, fully complies with API 670 4th Edition international standard. It converts large-range non-contact axial gap variation signals from probes into standardized linear analog voltage outputs
Description
Detailed Technical Specifications
| Parameter | Exact Specification |
|---|---|
| Product Series | 3300 XL 25 mm Differential Expansion Proximitor |
| Total System Length (50) | 5.0 meters (16.4 ft, probe cable + extension cable total length) |
| Mounting Mode (00) | Standard panel mount (supports optional DIN rail conversion) |
| Certification Version | Global standard industrial version, no regional special approval |
| Matching Probe Type | 33085 series 25 mm differential expansion eddy current proximity probes |
| System Sensitivity | 0.787 V/mm (20 mV/mil), fixed factory calibration, ±1% tolerance |
| Effective Linear Measurement Range | 0 mm – 12.7 mm (0 – 500 mils) |
| Full Proximity Detection Range | 0 mm – 25 mm |
| Linear Output Voltage Range | 0 VDC to -10 VDC analog output |
| Frequency Response Bandwidth | DC to 1 kHz (-3 dB), dedicated for low-frequency axial displacement measurement |
| Supply Voltage | -17.5 VDC to -26 VDC; rated working voltage: -24 VDC |
| Maximum Supply Current Consumption | 12 mA |
| Output Impedance | 50 Ω |
| Voltage Sensitivity Drift | <2 mV output change per 1V input voltage change |
| Probe Operating Temperature | -35 °C to +200 °C continuous; +250 °C short-term maximum temperature |
| Proximitor Module Operating Temperature | -51 °C to +100 °C |
| Storage Temperature Range | -55 °C to +125 °C |
| Cable Matching Standard | 75 Ω triaxial impedance matched fluidLoc cable |
| Module Housing Material | A380 die-cast aluminum alloy |
| Probe Body Material | AISI 304 stainless steel |
| Terminal Type | SpringLoc vibration-resistant quick terminals |
| Protection Grade | IP67 dustproof and waterproof |
| Electromagnetic Performance | High EMI/RFI interference immunity, compliant with EN 61000-6-2/4 |
| Module Dimensions (L×W×H) | 81.3 mm × 61 mm × 63.5 mm |
| Total Module Weight | 0.255 kg |
| Compliance Standards | API 670 4th Edition, CE, UL, CSA, ATEX, IECEx intrinsically safe certification |
| Origin | United States |
Core Functional Features
- API 670 Certified Large-Range Linear Accuracy
Special low-sensitivity design for 12.7mm wide linear measurement range; maintains constant sensitivity and stability across full stroke, fully meets international precision requirements for steam turbine differential expansion protection monitoring.
- 5.0m System Length Dedicated Matching Design
Strictly matches total 5.0m probe+extension cable system; ensures consistent system sensitivity and linear performance without field recalibration.
- Ultra-High Temperature Resistant Probe Matching
Supports matching high-temperature probes working under 200°C continuous high-temperature turbine cylinder environments; adapts to extreme thermal conditions of steam turbine equipment.
- Professional Low-Frequency Differential Expansion Optimization
1kHz frequency response bandwidth specially optimized for slow-changing axial differential expansion displacement; filters high-frequency vibration noise and improves axial position measurement accuracy.
- Superior Anti-Interference Performance
Optimized internal shielding circuit and triaxial matched cable structure; strong resistance to industrial electromagnetic radiation, high-voltage and motor interference; stable signal in harsh power plant environments.
- Patented Vibration-Resistant Terminal Design
SpringLoc anti-loosening terminals completely prevent wire loosening under strong mechanical vibration conditions.
- Panel & DIN Rail Dual Mount Compatibility
Standard panel mount structure, supports DIN rail conversion installation; adapts to various control cabinet layout requirements.
- Full System Interchangeability & Built-In Self-Diagnosis
Directly compatible with all 33085 series 25mm differential expansion probes; plug-and-play replacement without individual calibration; built-in real-time probe disconnection, short circuit fault diagnosis function.
Typical Application Scenarios
- Power Generation Industry (Core Application)
Steam turbine units, steam turbine generators; accurate monitoring of rotor-stator differential expansion axial thermal expansion displacement, rotor axial thrust position and cylinder expansion difference; is the core protection component for steam turbine overspeed and axial collision safety protection systems.
- Oil & Gas Industry
Large axial displacement monitoring of high-power gas turbine units, pipeline compressor main shafts.
- Petrochemical Industry
Axial position monitoring of large steam-driven centrifugal compressors and turbine drive units.
- Heavy Power Equipment Manufacturing
Matching testing and operation monitoring of large turbine equipment complete machine systems.
System Matching & Reliability Information
- Matching devices: 33085 series 25mm differential expansion proximity probes, 3308 series triaxial extension cables, 3500/40 differential expansion monitoring modules, 3500 machinery protection systems and FieldMonitor condition monitoring modules.
- Hazardous area compliance: Certified for Ex ia IIC T1-T5 Zone 0/2 intrinsically safe hazardous areas.
- Warranty period: 12 months for brand new original factory sealed products.
- Product status: Original brand new, in stock, available for global delivery.
- Matching rule: Total length of probe cable + extension cable must be strictly 5.0 meters to match this module.
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