Description
The Bently Nevada 9200-01-05-10-00 is a two-wire, moving-coil velocity seismoprobe transducer designed for continuous machinery casing vibration monitoring. This self-generating sensor provides a voltage output directly proportional to the vibration velocity of the machine casing, making it suitable for lower-frequency applications on bearing housings, gearboxes, and large rotating machinery where eddy-current proximity probes cannot be deployed internally. Because the module operates on electrodynamic moving-coil technology, it requires no external power to generate its primary signal.
Technical Specifications
| Parameter | Value / Specification |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model Number | 9200-01-05-10-00 |
| Transducer Type | Two-Wire Moving-Coil Seismoprobe |
| Scale Factor (Sensitivity) | 20 mV/mm/s (500 mV/in/s) \pm5% at 100 Hz |
| Frequency Response | 4.5 Hz to 1,000 Hz (\pm3 dB configuration dependent) |
| Maximum Displacement | 2.54 mm (0.1 in) peak-to-peak |
| Coil Resistance | 1.25 k\Omega \pm5% |
| Typical Inductance | 125 mH |
| Amplitude Linearity | \pm5% from 0.254 to 127 mm/s (0.01 to 5.0 in/s) |
| Operating Temperature | −29 to +121°C (−20 to +250°F) |
| Housing Material | Anodized aluminum |
| Net Weight | ~300 g (10.5 oz) |
Part Number Breakdown & Configuration Options
The specific suffix codes for 9200-01-05-10-00 indicate the following factory configurations:
- A Option (01) — Transducer Mounting Angle & Frequency: Configured for an orientation of 0^\circ \pm 2.5^\circ (standard vertical or horizontal alignment depending on calibration reference) with a minimum operating frequency down to 4.5 Hz (270 cpm).
- B Option (05) — Connector Type: Equipped with a terminal block top mount interface requiring no integral cable assembly.
- C Option (10) — Mounting Base Type: Circular mounting base featuring an M10 x 1 metric threaded stud.
- D Option (00) — Agency Approvals: No hazardous area or intrinsic safety approvals specified.
Commercial and Logistics Terms
- Condition: Factory New (Original Packaging) or New Surplus with verified factory serial numbers.
- Availability: In stock. Standard inspection, validation, and serialization logging require 1 to 2 business days prior to carrier pickup.
- Shipping & Lead Time: Worldwide priority shipping via DHL, FedEx, or UPS. Logistics transit averages 3 to 5 business days globally.
- Warranty: 12-month standard industrial warranty covering operational defects and structural calibration compliance.
- Pricing Notice: Inventory values for discontinued or legacy legacy Bently Nevada equipment are subject to immediate spot market fluctuations. Contact our procurement desk for a fixed commercial quote.
Engineering Context & Implementation Notes
Electrodynamic Core and Cross-Axis Sensitivity
The moving-coil mechanism provides excellent rejection of high-frequency impulse spikes or impact excitation, making it more resilient than traditional piezoelectric accelerometers in environments with severe mechanical shock. However, care must be taken regarding the mounting axis. The mechanical spring configuration is tuned strictly to the A01 option (0^\circ). Mounting this sensor at an angle greater than \pm2.5^\circ away from its designed axis shifts the internal coil off-center, leading to measurement errors, internal friction, and accelerated failure of the internal suspension springs. Cross-axis transverse sensitivity is limited to less than 10% of the active axis value.
Signal Conditioning and Monitoring Integration
The output signal is a differential AC voltage that requires termination into a high-impedance monitoring loop.
- Termination Impedance: Standard calibration expects a 10 k\Omega load across the signal pins (Terminal A and B).
- Maximum Cable Distance: The sensor supports run distances up to 305 meters (1,000 feet) of twisted-pair, shielded instrument cable between the transducer and the Bently Nevada 3500/42M or 3300 vibration monitors. When operating near maximum cable lengths, calculate line capacitance attenuation to prevent high-frequency roll-off.
- Polarity: Pin A goes positive relative to Pin B when the casing velocity vectors move toward the sensor’s connector interface.
Frequently Asked Questions
Can this sensor be used in Class I, Div 1 or ATEX Zone 0 environments?
No, the -00 suffix denotes that this specific module does not carry hazardous area certification. For explosive or intrinsically safe processing zones, you must source the -01 (CSA/NRTL) or -04 (ATEX/IECEx) approval variants, which must be paired with an approved Zener barrier or galvanic isolator inside the marshalling panel.
What is the purpose of the 9513 Velocity-to-Displacement Converter (VDC)?
If your diagnostic monitoring system requires a displacement reading (mils or microns peak-to-peak) rather than raw velocity values, the 9200 transducer can be integrated with an external Bently Nevada 9513 VDC. The VDC integrates the velocity wave into a standard 200 mV/mil (8 V/mm) output signal.
Why is the 9200 series preferred over an accelerometer for low-speed machinery?
Accelerometers lose signal resolution at lower rotational speeds because acceleration drops off exponentially as frequency decreases (Acceleration \propto Frequency^2). The moving-coil velocity probe maintains a high signal output (20 mV/mm/s) down to 4.5 Hz, making it significantly more sensitive and noise-resistant when monitoring large pumps, hydro-turbines, and low-speed fans.
