Description
Product Introduction
The Bently Nevada 9200-06-05-10-00 is a heavy-duty electrodynamic velocity transducer engineered to monitor absolute structural vibration on bearing housings, casing covers, and structural skids. Belonging to the classic 9200 Seismoprobe series, this 2-wire moving-coil sensor outputs a voltage signal directly proportional to vibration velocity without requiring external signal conditioning power.
Configured with the high-temperature option set (-06), the 9200-06-05-10-00 is built for extreme thermal environments, such as steam turbine casings and boiler feed pumps. Its spring-suspended coil mechanism and internal damping system provide stable, low-frequency measurement capabilities where standard solid-state accelerometers struggle with high-frequency noise integration.
Key Technical Specifications
| Parameter | Specification |
| Manufacturer | Bently Nevada / Baker Hughes |
| Part Number Configuration | 9200-AA-BB-CC-DD (06-05-10-00) |
| Transducer Type | Electrodynamic (Moving-Coil) Velocity Seismoprobe |
| AA Option (Target Temp Range) | 06 = High Temperature (-40°C to +260°C / -40°F to +500°F) |
| BB Option (Mounting Thread) | 05 = 1/2-20 UNF Thread |
| CC Option (Connector Type) | 10 = 2-pin MIL-C-5015 top-mounted connector |
| DD Option (Agency Approval) | 00 = No Agency Approvals Required / Standard |
| Standard Sensitivity | 20 mV/mm/s (500 mV/in/sec) nominal ±5% |
| Frequency Response | 10 Hz to 1000 Hz (600 cpm to 60,000 cpm) ±3 dB |
| Case Material | Stainless Steel with corrosion-resistant finish |
Application Scenarios & The “Trench” Experience
A power plant experienced repeated high-vibration trips on a boiler feed pump during peak load ramps. The installed piezoelectric accelerometers were picking up high-frequency piping noise and false electrical transients, leading to erratic velocity integrations in the 3500 rack. Swapping the noisy piezos for a pair of Bently Nevada 9200-06-05-10-00 Seismoprobes provided a clean, mechanical velocity signal directly to the 3500/33 relay module. The physical coil attenuation filtered out the pipe ring, stopping false trips and keeping the unit online during ramp-ups.
Target Applications:
- Steam & Gas Turbines: Casing vibration monitoring near high-temperature exhaust hoods and bearing pedestals.
- Boiler Feed & Pipeline Pumps: Continuous velocity monitoring on heavy industrial pumps subject to high thermal expansion.
- Large Motors & Compressors: Structural and frame vibration tracking on low-to-medium speed rotating machinery.
9200-06-05-10-00
Transparency SOP: Quality Assurance & Testing
Before any 9200-06-05-10-00 transducer leaves our facility, it passes through a calibrated electrodynamic shaker test loop:
- Inbound Mechanical Inspection: Inspection of stainless steel casing threads, MIL-C-5015 connector pins, seal integrity, and nameplate part-number verification.
- Coil Resistance & Isolation Check: DC resistance measurement across Pins A and B to verify coil continuity, followed by a high-resistance megohmmeter check to ground.
- Calibrated Shaker Frequency Sweep: Mounted on a reference shaker table at 80 Hz to verify calibrated output sensitivity against factory curves.
- Thermal Soak Validation: High-temp units undergo environmental chamber verification to ensure zero coil drag or mechanical binding under thermal expansion.
- ESD Protective Packaging: Cleaned, fitted with protective thread/connector caps, sealed in anti-static bags, and packed in heavy-foam protective boxes.
The Veteran’s Tech Trap Guide
- ⚠️ Mind the mounting orientation! Electrodynamic moving-coil probes like the 9200 series rely on internal springs. Installing an upright-configured probe upside down or horizontally will cause the internal coil to rest against mechanical stops, completely dampening the output signal.
- ❗ Never use thread tape on the mounting stud! Wrap-tape on the 1/2-20 UNF mounting stud disrupts mechanical transmission between the bearing housing and the probe base. Always torque the sensor directly face-to-metal using a high-temperature thread-locking compound if specified.
- ⚠️ Watch out for magnetic field interference. Because the 9200 uses an internal permanent magnet and coil assembly, mounting it within inches of unshielded high-amperage motor leads or generator field coils will induce 60Hz/50Hz hum directly into the signal loop.
- ❗ Check cable connector strain relief. The 2-pin MIL-C-5015 connector (
-10option) must be properly mated and safety-wired in high-vibration locations. Unsupported cable runs will snap the connector pins right at the top flange.
Frequently Asked Questions
Q: Can I connect the 9200-06-05-10-00 directly to a Bently Nevada 3500 monitoring system?
A: Yes. The 9200 series connects directly to the Bently Nevada 3500/33 16-Channel Relay Module or 3500/42M Velocity/Seismic Monitor I/O modules configured for moving-coil velocity inputs.
Q: Does this transducer require loop power or a proximity driver?
A: No. The 9200 is a self-generating electrodynamic transducer. It generates its own AC voltage signal proportional to velocity without any external power or Proximitor sensor.
Q: What is the difference between the standard 9200 and the 74712 series?
A: The 9200 is the updated, standard product line replacement for the older 74712 Seismoprobe series, offering improved environmental sealing and standardized connector options.
Q: What cable should I use with the 2-pin MIL connector (-10 option)?
A: Use a standard 2-conductor shielded twisted-pair (STP) high-temperature cable fitted with a mating MS3106A-10SL-4S connector boot.
Q: What warranty comes with surplus 9200-06-05-10-00 transducers?
A: All inspected, bench-tested surplus and reconditioned 9200 Seismoprobes come backed by a full 12-month replacement warranty.
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