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Match the complete marking
Send the complete 330525-CN marking, mounting and two-pin connector photographs, together with the required quantity and installed sensor circuit details.
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Check the offered item before ordering
Compare the offered velocity sensitivity, powered-input requirements and cable sealing arrangement with the installed equipment and applicable manufacturer instructions.
Technical specifications for 330525-CN
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:330525-CN
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Weight:0.15 kg
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Tariff Code:8537101190
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Velocity sensitivity:3.94 mV/mm/s (100 mV/in/s), ±5%
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Frequency response:4.5–2000 Hz, ±3 dB
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Flat response band:6–1000 Hz, ±0.9 dB
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Velocity range:1270 mm/s peak
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Amplitude linearity:±2% to 152 mm/s peak
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Transverse sensitivity:Less than 5%
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Supply voltage:-22 to -30 VDC
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Bias current:2.5–6.0 mA
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Output bias:-12 ±3.0 VDC, referenced to Pin A
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Dynamic output impedance:Less than 2400 ohm
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Operating temperature:-55 to +121 °C
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Connector:2-pin MIL-C-26482, hermetically sealed
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Case isolation:Electrically isolated
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Mounted resonant frequency:Greater than 12 kHz
Information
Overview
Downloads
Applications / Compatibility
Product Precautions
- Bently Nevada 330525-CN converts vibration transmitted through a machine casing into a velocity signal, supporting measurements where a rugged sensor and protected field connection are needed.
Signal output: 3.94 mV/mm/s (100 mV/in/s), ±5%
Response: 4.5–2000 Hz, ±3 dB
Construction: isolated 316L case with hermetic two-pin connector
Response: 4.5–2000 Hz, ±3 dB
Construction: isolated 316L case with hermetic two-pin connector
The Velomitor XA design uses a rugged case and weatherproof mating cable arrangement for installation without an additional sensor housing. IP65 and NEMA 4X performance depend on correct installation with the appropriate mating cable; the connector assembly is part of that environmental protection.
The sensor provides a velocity-proportional output over 4.5–2000 Hz at ±3 dB, with a tighter ±0.9 dB band from 6–1000 Hz. Nominal sensitivity is 3.94 mV/mm/s, and the signal circuit requires -22 to -30 VDC with 2.5–6.0 mA bias current.
A useful housing measurement depends on a location that transmits the rotor vibration of interest. Mounting stiffness, orientation and cable restraint affect the acquired signal. The case is electrically isolated, while the two-pin interface carries the powered signal circuit to a compatible monitoring channel.
The sensor provides a velocity-proportional output over 4.5–2000 Hz at ±3 dB, with a tighter ±0.9 dB band from 6–1000 Hz. Nominal sensitivity is 3.94 mV/mm/s, and the signal circuit requires -22 to -30 VDC with 2.5–6.0 mA bias current.
A useful housing measurement depends on a location that transmits the rotor vibration of interest. Mounting stiffness, orientation and cable restraint affect the acquired signal. The case is electrically isolated, while the two-pin interface carries the powered signal circuit to a compatible monitoring channel.
Controller platform reference: Bently Nevada Velomitor XA measurement chain. Follow the applicable sensor instructions and approved mounting design.
Original 330525 technical data applicable to 330525-CN, with electrical limits, mounting polarity and cable-interface drawings. The separate installation guide covers housing location, powered signal wiring, cable sealing and vibration-response checks.
330525-CN Official Datasheet Excerpt
Original 330525 technical data applicable to 330525-CN, with electrical limits, mounting polarity and cable-interface drawings. PDF · 5 pages.330525-CN Installation & Verification Guide
Apter Power installation guide for housing-transmitted velocity measurement and the two-pin Velomitor XA circuit. PDF · 5 pages.
Original manufacturer pages retain their technical context. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
System and supply context: The sensor mounts on the machine housing and connects to a compatible powered velocity input. Cable, boot, clamps and monitoring hardware are separate unless included in the quotation.
Application scope: Use a mounting location that transmits the vibration of interest. The sensor measures casing motion at that point, rather than direct shaft displacement relative to the bearing.
Application scope: Use a mounting location that transmits the vibration of interest. The sensor measures casing motion at that point, rather than direct shaft displacement relative to the bearing.
Bearing-housing vibration
Acquire a velocity signal from a suitable housing surface that transmits the relevant machine vibration.Exposed sensor positions
Use the appropriate mating cable and protection assembly when moisture or dust exposure requires the rugged XA construction.Remote monitor connections
Route the powered sensor circuit to the receiving monitor using the specified cable type and an assessed cable length.Machine condition trending
Compare velocity measurements at a consistent location, direction and bandwidth to track changes over time.
Prepare Bently Nevada 330525-CN for its configured installation using these checks.
Location selection
Choose a rigid surface and measurement direction that transmit the vibration being monitored.
Mounting interface
Use the matching mounting interface; do not exceed the 45 N·m mounting-torque maximum.
Circuit compatibility
Confirm -22 to -30 VDC and 2.5–6.0 mA bias capability at the sensor circuit.
Weather protection
Install the correct mating cable, boot and clamps; a bare connector does not establish the stated protection.
Cable restraint
Retain at least 1.5 in bend radius and prevent movement from loading the sensor connection.
Signal check
Check bias and vibration response through the receiving channel before accepting the measurement.
Alternative Names
330525-CN
Bently Nevada 330525-CN
Technical notes
Sensitivity conditions: The ±5% sensitivity specification applies at 100 Hz and +20 to +30 °C unless otherwise stated.
Directional response: Pin A goes positive relative to Pin B when case motion is toward the connector.
Environmental boundary: The non-submerged humidity rating and properly assembled weatherproof connection do not authorize underwater operation.
FAQ View All FAQ
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Does 330525-CN measure casing velocity or shaft-relative displacement?It measures motion transmitted through the mounting surface and produces a velocity-proportional signal. A shaft-relative displacement measurement requires a proximity-transducer arrangement.
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Which frequency band gives 330525-CN the tighter amplitude response?The 6–1000 Hz band is specified at ±0.9 dB. Its broader 4.5–2000 Hz response is specified at ±3 dB, so the two bands should not be treated as having the same amplitude tolerance.
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What powered-input circuit is required by 330525-CN?The sensor requires -22 to -30 VDC with 2.5–6.0 mA bias current. Confirm compatibility with the receiving velocity input rather than connecting it as an unpowered voltage source.
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How is output polarity defined for 330525-CN?Pin A becomes positive with respect to Pin B when sensor-case motion is toward the connector. Preserve the pin assignment when evaluating phase or replacing a cable.
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Is the IP65 performance of 330525-CN independent of its mating cable?No. The rating depends on proper installation with the mating extension cable and protection arrangement. The sensor, connector and cable assembly must be considered together.
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What separates peak range and linearity on 330525-CN?The velocity range is 1270 mm/s peak, while the ±2% amplitude-linearity statement applies only through 152 mm/s peak. The tighter linearity must not be extended to the full peak range.
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How long can the specified field cable for 330525-CN be?Up to 305 m of Bently Nevada 02173007 cable is specified without signal degradation. That limit should not be transferred automatically to a different cable construction.
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Why must the mounting point of 330525-CN transmit rotor vibration effectively?A flexible or poorly selected housing location can attenuate or alter the vibration reaching the sensor. A secure, suitable mounting surface is necessary for the signal to represent the machine behavior of interest.
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