Product Description
Bently Nevada 87870-01 Velomitor XA Piezo-Accelerometer
Product Overview
- The Bently Nevada 87870-01 Velomitor XA Piezo-Accelerometer measures casing vibration in rotating and reciprocating machinery, such as turbines, compressors, pumps, and motors, across power generation
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Series | Velomitor XA Series |
| Model/Part Number | 87870-01 |
| Model Type | Velomitor XA Piezo-Accelerometer |
| Function | Measures casing vibration (acceleration) using piezoelectric technology |
| Processor | Not applicable (passive sensor) |
| Memory | Not applicable |
| Display | None |
| Inputs | Not applicable (senses mechanical vibration) |
| Outputs | 1 analog signal (100 mV/g nominal sensitivity) |
| Communication Interfaces | None (connects directly to Bently Nevada monitors or signal conditioners) |
| Signal Conditioning | Generates voltage proportional to acceleration (conditioned by connected monitor) |
| Measurement Range | ±50 g peak |
| Frequency Range | 3 Hz to 10 kHz (±3 dB) |
| Accuracy | ±5% of nominal sensitivity (100 mV/g) |
| Redundancy | Non-redundant |
| Diagnostics | Limited to signal integrity (diagnostics handled by connected monitor) |
| Compatibility | Works with Bently Nevada 3300 Series monitors (3300/55), 3500 Series monitors (3500/42M), and System 1 software via monitor interface; compatible with standard IEPE (Integrated Electronics Piezo-Electric) signal conditioners |
| Power Supply | Requires constant current excitation (2–10 mA, 18–30 VDC) from monitor or external IEPE power source |
| Power Consumption | Approximately 0.05–0.2 W |
| Environmental Specifications | Operating Temperature: -55°C to +121°C (-67°F to +250°F) Storage Temperature: -55°C to +150°C (-67°F to +302°F) Relative Humidity: 0% to 100% condensing Vibration: Complies with IEC 60068-2-6 Shock: Complies with IEC 60068-2-27 |
| Enclosure | IP68 (stainless steel housing) |
| Dimensions | Approximately 25 mm diameter x 60 mm height (excluding cable) |
| Weight | Approximately 0.1–0.2 kg (sensor with integral cable) |
| Mounting | 1/4-28 UNF stud mount; mounts on machine casing or bearing housing |
| Certifications | Meets CE, CSA, ATEX/IECEx Zone 0/1/2 (with approved barriers), marine certifications, such as DNV, ABS |