Excellent PLC
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Product Overview
The Bently Nevada 330850-51-00 is part of the 3300 XL 25 mm Proximity Transducer System, designed to accurately measure differential expansion (DE) in large steam turbines. It includes a 25 mm proximity probe, a 5-meter extension cable, and the Proximitor Sensor. With an output scale factor of 0.787 V/mm (20 mV/mil), it supports linear measurements up to 12.7 mm (500 mils).
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 330850-51-00 |
| System Length | 5.0 meters |
| Weight | 0.255 kg (Proximitor Sensor only) |
| Output Scale Factor | 0.787 V/mm (20 mV/mil) |
| Linear Range | 0.63 mm to 13.33 mm (25–525 mils) |
| Operating Temp (Probe) | -35°C to +200°C |
| Short-Term Temp | +250°C (≤24 hrs) |
| Operating Temp (Sensor) | -51°C to +100°C |
| Storage Temp (Sensor) | -51°C to +105°C |
| Frequency Response | 0 to 2.7 kHz |
| Minimum Target Size | 61 mm (2.4 in) diameter |
| Material (Probe) | AISI 304 Stainless Steel |
| Material (Sensor) | A380 Aluminum |
| Environmental Rating | 100% condensing humidity (non-submersible) |
| Certifications | CE, CSA, ATEX, IECEx |
Applications
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Steam turbine differential expansion (DE) monitoring
-
Shaft movement measurement in power generation
-
High-temperature rotating machinery environments
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Redundant DE detection with dual-probe configurations
-
Suitable for harsh industrial turbine enclosures
Advantages
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High survivability in extreme environments (up to 250°C)
-
Fully backward compatible with 7200 and DE Integral systems
-
Moisture protection with dual-sealing and FluidLoc cable
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Fast, tool-free SpringLoc terminal wiring
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Compatible with sliding bracket for precise probe alignment
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Designed for EMI/RFI immunity and CE compliance
FAQs
Q1: What is the maximum linear measurement range?
A1: The linear range is up to 12.7 mm (500 mils).
Q2: Can it be used in high-temperature environments?
A2: Yes, it supports continuous operation at 200°C and short-term peaks up to 250°C.
Q3: Is it compatible with older 7200 series systems?
A3: Yes, it’s designed to replace 7200 25 mm and 35 mm systems with no monitor configuration changes.
Q4: What materials are used in the sensor and probe?
A4: The probe uses AISI 304 stainless steel; the sensor is A380 aluminum.
Q5: What are the output characteristics?
A5: It provides 0.787 V/mm (20 mV/mil), linear from 0.63 mm to 13.33 mm.
Q6: Does it have protection against environmental moisture?
A6: Yes, via a sealed tip and FluidLoc triaxial cable.
Q7: What is the operating temperature range of the Proximitor Sensor?
A7: It operates from -51°C to +100°C.
Q8: Can this model be DIN-mounted?
A8: Yes, the “-51” in the part number specifies DIN mount.
Q9: Are special tools required for installation?
A9: No, SpringLoc terminals allow tool-free installation.
Q10: Is it certified for hazardous environments?
A10: Yes, including CSA, ATEX, and IECEx approvals for Zone 0/Zone 2 installations.
Related Bently Nevada Models (Same Series or Function)
| Model | Description | Length | Weight |
|---|---|---|---|
| 330850-50-00 | Proximitor Sensor, 5.0m, Panel Mount | 5.0 m | 0.255 kg |
| 330850-91-00 | Proximitor Sensor, 9.0m, DIN Mount | 9.0 m | 0.255 kg |
| 330851-01-000-020-10-00-05 | 25 mm Probe, 2.0″ case, 5.0m | 5.0 m | ~0.41 kg |
| 330851-04-000-015-10-00-05 | Side Exit Probe, 1.5″ case | 5.0 m | ~0.41 kg |
| 330854-040-24-05 | 4.0m Extension Cable | 4.0 m | ~0.18 kg |
| 330853-01-00 | Sliding Bracket for Single DE | – | 0.58 kg |
Popular Bently Nevada Models
| Model | Description | Function | Weight |
|---|---|---|---|
| 3500/42M | Proximitor/Seismic Monitor | Vibration Monitoring | ~1.0 kg |
| 3500/22M | Transient Data Interface Module | Data Collection | ~0.9 kg |
| 3500/20 | Rack Interface Module | System Interface | ~0.8 kg |
| 3500/15 | Power Supply Module | Power Regulation | ~1.2 kg |
| 330400 | Proximity Probe, 8 mm | Shaft Vibration | ~0.3 kg |
| 330930-065-01-00 | Velomitor Sensor | Velocity Vibration | ~0.4 kg |
