Description
Overview
The Bently Nevada 330780‑90‑05 Proximitor Sensor is part of the 3300 XL 11 mm transducer family and is engineered for precise vibration and shaft position measurements in demanding rotating‑machinery applications. This model supports a total system length of 9.0 meters and is suitable for both panel‑mount and DIN‑rail installations, offering flexibility for compact or high‑density monitoring systems.
Key Characteristics
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Model: 330780‑90‑05
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Sensor Type: 3300 XL 11 mm Proximitor Sensor
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System Length: 9.0 m
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Mounting Options: DIN‑rail or panel mount
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Electrical Isolation: Integrated isolated mounting base
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Weight: 0.22 kg
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Dimensions: 8 × 6 × 6.5 cm
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Certifications: CSA, ATEX, IECEx
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Condition: New
Functional Description
The 330780‑90‑05 sensor forms the signal‑conditioning stage of the 3300 XL 11 mm proximity measurement system. It converts the raw eddy‑current probe signal into a calibrated voltage proportional to shaft displacement or vibration amplitude. Its mechanical design retains the traditional 4‑hole mounting footprint while incorporating an isolated base, eliminating the need for external insulating hardware.
The sensor’s RFI/EMI performance meets CE requirements without requiring shielded conduit or metallic enclosures, enabling installation in fiberglass housings or compact monitoring cabinets. SpringLoc terminal strips allow rapid, tool‑free wiring and maintain secure electrical connections even under continuous vibration.
With a sensitivity of 7.87 V/mm (200 mV/mil) ±3%, the 330780‑90‑05 provides accurate readings across a linear range of approximately 0.25–2.3 mm. Operating from a –24 V DC supply, it delivers stable performance in environments where electrical noise, temperature variation, and mechanical stress are common.
Technical Specifications
Mechanical
| Parameter |
Value |
| Dimensions |
8 × 6 × 6.5 cm |
| Weight |
0.22 kg |
| Mounting |
DIN‑rail or panel mount |
| Base |
Electrically isolated |
Electrical
| Parameter |
Value |
| Sensitivity |
7.87 V/mm (200 mV/mil) ±3% |
| Linear Range |
0.25–2.3 mm |
| Input Power |
–24 V DC |
| System Length |
9.0 m |
| Compatible Probes |
3300 XL 11 mm series |
Environmental
| Parameter |
Value |
| Certifications |
CSA, ATEX, IECEx |
| RFI/EMI Immunity |
CE‑compliant without shielded conduit |
| Operating Environment |
Industrial machinery monitoring systems |
Applications
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Turbines (steam, gas, hydro)
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Compressors and expanders
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Large industrial motors and generators
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Gearboxes and high‑speed rotating equipment
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API 670‑compliant protection systems
FAQ
Q: Can this sensor be used with 8 mm probes? A: No. It must be paired with 11 mm probes to maintain correct calibration and linearity.
Q: Does the sensor require shielded conduit for CE compliance? A: No. Its RFI/EMI immunity meets CE standards without additional shielding.
Q: Is the mounting base already isolated? A: Yes. The integrated isolation eliminates the need for separate isolator plates.
