Product: 330171-00-20-05-02-00
Category: Accelerometer / Velocity Sensor System (for casing vibration)
Overview:
The 330171-00-20-05-02-00 is a complete seismic transducer system from the Bently Nevada 3300 series, designed for measuring absolute casing/bearing vibration. Unlike proximity probes that measure shaft-relative motion, this system measures the vibration of the machine structure itself. This specific part number denotes a system with an integrated 20 ft (6.1 m) cable and a top exit connector. It combines a piezoelectric accelerometer with a built-in electronic integrator to directly output a velocity signal, simplifying installation and providing a robust solution for monitoring vibration on a wide range of industrial machinery.
Key Parameters & Specifications
| Parameter | Specification / Description |
|---|---|
| Function | Casing-Mounted Seismic Vibration Sensor (Accelerometer with Internal Integration). |
| Primary Measurand | Vibration Velocity (e.g., in/s peak or mm/s RMS, depending on connected monitor). |
| Output Signal | Low-impedance voltage signal proportional to velocity. Requires connection to a compatible monitor (e.g., 3300/20, 3500/42) for power and signal processing. |
| Sensitivity (Typical) | 100 mV/in/s or 500 mV/mm/s (common values; exact sensitivity is specified on calibration sheet). |
| Frequency Range | 4.5 Hz to 2,000 Hz (typical for a velocity-output seismic sensor). |
| Measurement Range | Up to 2.0 in/s peak (51 mm/s) or higher, depending on the connected monitor's input range. |
| Power Supply | Constant Current, 2-10 mA DC (typically 4 mA) supplied by the monitoring module (e.g., 3300/20). |
| Operating Temperature | -50°C to +120°C (-58°F to +248°F). |
| Mounting | Single ¼-28 UNF or M6 threaded stud on the base. Magnetic base adapters are also commonly used. |
| Orientation | Mounting orientation is not critical for performance. |
| Housing | Robust, stainless steel or anodized aluminum hermetic case. |
| Connector Type | Integral, potted cable with a 2-pin or 3-pin MIL-Spec connector (e.g., MIL-C-5015) at the end of the 20 ft cable. The -02-00 suffix often specifies this connector style. |
| Cable Length | 20 feet (6.1 meters) of integrated, armored cable. |
| Cable Exit | Top Exit (as opposed to side exit), which helps with drip-loop formation and strain relief. |
| Weight (Sensor + Cable) | Approximately 0.9 kg (2.0 lbs). The sensor itself is typically ~0.3 kg (0.66 lbs). |
| Dimensions (Sensor Body) | Compact cylinder: Approx. 25-30 mm (1.0-1.2 in) in diameter x 50-60 mm (2.0-2.4 in) in height (excluding mounting stud). |
Primary Application Scenarios
General-Purpose Casing Vibration Monitoring:
The go-to solution for measuring overall vibration on pumps, electric motors, fans, blowers, compressors (reciprocating and centrifugal), gearboxes, and mixers where shaft access for a proximity probe is not available or not required.
Low-Speed Machinery Monitoring:
Effective for machines with rotational speeds down to ~300 RPM (where 4.5 Hz lower frequency limit is suitable), such as large induced draft fans or certain paper machine rolls.
Predictive Maintenance (PdM) & Continuous Monitoring:
Permanently installed on critical or problem machines to provide continuous vibration velocity signals to a Bently Nevada 3300 or 3500 monitoring system, enabling trend analysis and early fault detection (imbalance, misalignment, bearing defects, resonance).
API 670 Compliance for Non-Shaft Monitoring Points:
Used to meet American Petroleum Institute (API) Standard 670 requirements for machinery protection on equipment where casing vibration measurement is specified as the primary or secondary method.
Cross-Industry Applications:
Power Generation: Boiler feed pumps, cooling tower fans, turbine auxiliary drives.
Water & Wastewater: Large vertical turbine pumps, aeration blowers.
Oil & Gas: Pipeline pumps, generator sets, gas compressor auxiliary equipment.
HVAC: Large chillers and air handling units.
Important Note: This sensor outputs a voltage signal proportional to velocity. It is not a 4-20 mA transmitter. It must be connected to a compatible vibration monitor (such as a Bently Nevada 3300/20 or 3500/42/44/46 module) that provides the required constant current power (ICP®/IEPE compatible) and conditions the signal for display, alarming, and relay outputs. Always refer to the calibration sheet shipped with the specific unit (330171-00-20-05-02-00) for its exact sensitivity and frequency response.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
Your trust is the driving force for our continuous progress, submit your requirements immediately to get exclusive quotes
