Description

Bently Nevada 9200-09-01-01-00 Velocity Seismoprobe Transducer

Configured for measurement of absolute velocity vibration at bearing housing and structural mounting points in rotating machinery vibration monitoring loop,the Bently Nevada 9200-09-01-01-00 (9200 Velocity Seismoprobe Transducer) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

• 9200: Two-wire velocity Seismoprobe transducer platform
• 09: Minimum operating frequency and mounting orientation configuration (15 Hz cutoff, omnidirectional mounting angle)
• 01: Top-mounted electrical connector configuration (no integral cable)
• 01: Circular base with 1/4 in-20 UNC stud mounting interface
• 00: Standard configuration without agency certification requirements

Hardware Specifications

Parameter	Specification
ModelBrand	Bently Nevada 9200-09-01-01-00
Origin	USA
Weight	~300 g
Dimensions	Height 102 mm, Diameter 41 mm
OperatingTemp	-29 degC to +121 degC
PowerConsumption	Passive self-generating velocity transducer
Sensitivity	20 mV/mm/s (500 mV/in/s) +/- 5% at 22 degC
FrequencyResponse	15 Hz to 1000 Hz (-3 dB typical)
VelocityRange	Up to 25 mm/s peak
CoilResistance	1.25 kOhm +/- 5%
TransverseSensitivity	<10% of axial sensitivity

Rotordynamics Signal Integrity and Cross-Talk Suppression Behavior

The Bently Nevada 9200-09-01-01-00 operates as a velocity-based electrodynamic pickup element, generating a proportional voltage output through relative coil motion within a magnetic field. In rotating machinery monitoring chains, the device output is directly influenced by rotordynamics excitation modes, including shaft imbalance and structural resonance coupling.

Cross-axis mechanical coupling is limited through internal suspension geometry, maintaining transverse sensitivity below 10% at 100 Hz. Signal scaling behavior is independent of external excitation power, and output stability is governed by coil velocity response rather than displacement amplitude. This eliminates dependency on external excitation circuits typical of eddy-current probe scaling systems and avoids gap-voltage validation mechanisms such as -10 VDC reference loops used in proximity probe systems.

Frequently Asked Questions

Q1: Is the output signal active or externally powered?
A1: The transducer is passive. Output voltage is generated by coil motion within a magnetic field and does not require excitation power.

Q2: Can the unit be connected directly to a high-impedance input?
A2: Yes. Recommended load is 10 kOhm or higher to maintain calibrated sensitivity response and prevent amplitude attenuation.

Q3: What limits the low-frequency response boundary?
A3: The low-frequency cutoff is defined by mechanical suspension characteristics and the 15 Hz configuration option (09 suffix), not by electronic filtering.

Field Installation Guidelines

Mount the transducer rigidly using the 1/4 in-20 UNC stud interface on a machined surface with verified flatness. Ensure full thread engagement of at least 5 turns minimum to prevent mechanical loosening under vibration load.

Route signal wiring using shielded twisted pair conductors. The shield should be grounded at a single acquisition system end only to prevent ground loop current injection.

Avoid routing signal lines parallel to high-current switching conductors or VFD output cables to minimize induced noise coupling.

Install orientation according to expected vibration vector direction; although omnidirectional mounting is supported, axial alignment improves signal fidelity for dominant vibration modes.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems