
Product Description
Bently Nevada 21500-00-12-05-02 Velomitor Piezo-Velocity Sensor
The Bently Nevada 21500-00-12-05-02 is a high-performance Velomitor piezo-velocity sensor designed for continuous vibration monitoring in rotating and reciprocating machinery. This industrial-grade sensor delivers reliable velocity measurements for pumps, motors, fans, and compressors, enabling predictive maintenance programs that prevent costly unplanned downtime.
Key Features
- ✅ Piezo-Velocity Technology – Direct velocity output without integration or differentiation
- ✅ Wide Frequency Range – 10 Hz to 1 kHz for general machinery monitoring
- ✅ High Sensitivity – 100 mV/mm/s (typical) for accurate vibration detection
- ✅ Industrial Durability – Hermetically sealed, stainless steel housing
- ✅ Easy Installation – Standard 1/4-28 UNF mounting thread
- ✅ ISO 10816 Compliant – Meets international vibration standards
Technical Specifications
| Part Number | 21500-00-12-05-02 |
| Product Type | Velomitor Piezo-Velocity Sensor |
| Sensitivity | 100 mV/mm/s (typical) |
| Frequency Range | 10 Hz to 1 kHz (±3dB) |
| Measurement Range | 0-50 mm/s RMS |
| Operating Temp | -40°C to +121°C (-40°F to +250°F) |
| Mounting Thread | 1/4-28 UNF |
| Electrical Connection | 2-pin MIL connector |
| Housing Material | Stainless steel (hermetically sealed) |
| Weight | 0.2 kg |
| Certifications | CE, ISO 10816 |
Industrial Applications
Pumps & Motors
Monitor vibration in centrifugal pumps, positive displacement pumps, and electric motors. Early detection of bearing wear, unbalance, and misalignment prevents costly downtime.
Fans & Blowers
Track vibration levels in induced draft fans, forced draft fans, and process blowers. Prevent blade damage and bearing failures in HVAC and industrial ventilation systems.
Compressors
Measure vibration in reciprocating compressors, screw compressors, and rotary compressors. Detect valve failures, bearing wear, and foundation issues.
Gearboxes & Reducers
Monitor gearbox vibration to identify gear tooth wear, bearing defects, and lubrication problems. Extend gearbox life through predictive maintenance.
Installation Guidelines
Mounting Best Practices
- Surface Preparation – Clean and flat mounting surface (remove paint, rust, or debris)
- Mounting Location – Install on bearing housing or machine casing near bearing
- Thread Engagement – Minimum 1.5 turns thread engagement
- Torque – Tighten to 5-7 Nm (45-60 in-lbs)
- Cable Routing – Secure cable to prevent vibration-induced fatigue
- Electrical Connection – Connect to vibration monitor or data collector
Mounting Options
- Stud Mount: Direct threaded mounting (most common)
- Magnetic Mount: Temporary installation for route-based monitoring
- Adhesive Mount: For non-threaded surfaces (use industrial epoxy)
Velomitor vs Accelerometer
| Feature | Velomitor (This Product) | Accelerometer |
|---|---|---|
| Output | Velocity (mm/s) | Acceleration (g) |
| Frequency Range | 10 Hz - 1 kHz | 2 Hz - 10 kHz |
| Best For | General machinery (ISO 10816) | High-frequency faults (bearing defects) |
| Power Required | No (self-generating) | Yes (4-20mA or IEPE) |
| Cost | Lower | Higher |
Authenticity Guarantee
⚠️ Counterfeit Sensor Risks
Non-genuine Velomitor sensors can cause:
- ❌ Inaccurate vibration readings leading to missed faults
- ❌ Premature failure in harsh environments
- ❌ Incompatibility with monitoring systems
- ❌ Voided warranty and support
✅ Industrial Control Hub Guarantee
- 🔒 100% Genuine Bently Nevada – Factory-sealed packaging
- 📜 Calibration Certificate – Includes sensitivity data
- 🌍 Authorized Distributor – Verify at Baker Hughes partner portal
- 🛡️ 24-Month Warranty – Manufacturer warranty honored globally
Package Contents
- 1× Bently Nevada 21500-00-12-05-02 Velomitor sensor
- Mounting hardware (stud and lock washer)
- Product documentation and calibration certificate
Technical Support
- 📧 Application Engineering – Email us for sensor selection and mounting guidance
- 📚 Documentation – Installation manuals, ISO 10816 guides
- 🔧 Commissioning Support – Remote assistance for setup
- 🔄 30-Day Returns – Unused sensors in original packaging
FAQ
Q: What is the difference between Velomitor and accelerometer?
A: Velomitor outputs velocity (mm/s) directly, ideal for ISO 10816 compliance. Accelerometers output acceleration (g), better for high-frequency analysis.
Q: Does this sensor require power?
A: No, Velomitor is self-generating (piezo-electric). No external power required.
Q: Can I use this for API 670 applications?
A: No, Velomitor is for general purpose monitoring (ISO 10816). Use seismic sensors or accelerometers for API 670.