Description
Bently Nevada 9200-01-02-02-00 | Seismoprobe Velocity Transducer
Architect’s Product Breakdown
The Bently Nevada 9200-01-02-02-00 is a specialized two-wire moving-coil velocity transducer built to capture absolute vibration metrics on critical rotating machinery like large pumps, compressors, and turbines. By utilizing a self-generating seismic design, it outputs an electrical voltage directly proportional to vibration velocity without requiring external power at the point of measurement.
The specific digit suffix configuration (-01-02-02-00) designates a calibration mounting angle for horizontal/vertical baseline tolerances with a low minimum operating frequency capability, a side-mount electrical connection style, a 1/4-28 UNF circular mounting stud base, and standard baseline classification. In industrial retrofits, matching these exact option suffixes ensures the dynamic response and mechanical thread pitch align with existing machine mounting pads, preventing data skew or improper mechanical loading.
9200-01-02-02-00
Key Technical Specifications
| Parameter | Technical Specification |
| System Compatibility | Bently Nevada vibration monitoring systems / portable diagnostic gear |
| Transducer Type | Two-wire moving-coil Seismoprobe |
| Electrical Sensitivity | 20 mV/mm/s (500 mV/in/s) \pm 5\% |
| Frequency Response | 10 to 1000 Hz (600 to 60,000 CPM) typical [-3dB] |
| Dynamic Range | 2.54 mm (0.100 in) peak-to-peak maximum displacement |
| Coil Resistance / Inductance | 1.25 k\Omega \pm 5\% / 125 mH typical |
| Mounting Option | Circular base with 1/4-28 UNF stud |
| Connector Type | Side mount connector interface |
| Operating Temperature | -29^\circC to +121^\circC (-20^\circF to +250^\circF) |
| Weight | 300 grams (10.5 ounces) typical |
Field Engineer’s Pitfall Guide (Unique Value)
- Warning: Low-Frequency Attenuation: Pay close attention to the machine running speed. Installing a transducer with an incompatible mounting-angle/frequency option on a slow-speed reciprocating compressor will filter out real vibration data below the minimum operating threshold.
- Warning: Rigid Stud Coupling: Ensure the mounting stud is torqued flat against a cleanly spot-faced machine surface. I’ve diagnosed false high-frequency spikes on turbine casing logs simply because an installation technician left a microscopic air gap under the 1/4-28 UNF stud, causing the sensor body to rock slightly under high-amplitude vibration.
- Warning: Cable Shield Grounding: Always land the signal cable shield drain wire correctly at the monitor rack marshalling earth, leaving it floating at the transducer end to prevent ground loops from injecting plant electrical noise into the velocity signal.
QA & Testing SOP (Transparency)
- Visual & Origin Inspection: Verified for clean housing threading, unbroken casing seals, and correct stamping of the part number string.
- Dynamic Shaker Table Test: Mounted on an automated calibration shaker table to verify electrical sensitivity output matches the nominal 500 mV/in/s baseline across expected operating frequencies.
- Coil Resistance Verification: Multi-meter checked to confirm internal coil resistance sits strictly within the 1.25 k\Omega \pm 5\% tolerance band.
- Packaging: Encased in anti-static material and sealed within heavy-duty moisture-barrier packaging to preserve structural integrity during transit.
Technical FAQ
Does the 9200 Seismoprobe require an external power supply?
No. The 9200 is a two-wire moving-coil passive transducer that generates its own velocity-proportional voltage signal via internal magnetic induction, meaning it requires no loop power or external DC supply to operate.
Can I mount this velocity sensor in any physical orientation?
No. Seismoprobe transducers are calibrated for specific gravity-dependent mounting angles (such as vertical or horizontal orientation). Installing a sensor at an angle outside its designated engineering suffix configuration introduces gravity bias on the internal seismic mass, reducing measurement accuracy.
How does the 9200 differ from solid-state Velomitor options?
While Bently Nevada’s solid-state Velomitors use internal electronics to integrate acceleration into velocity, the 9200 relies on traditional moving-coil mechanics. Moving-coils are mechanically robust against certain heavy impact shocks, but require careful consideration regarding low-frequency cutoffs and physical wear over extended operating lifecycles.
Is the connector cable included with model 9200-01-02-02-00?
No. The “-02” side-mount design indicator denotes the physical connector layout on the housing body itself; separate interconnect cable assemblies must be ordered or sourced independently based on the required cable run length and armor protection.
