Configured for vibration velocity measurement in Bently Nevada machinery monitoring systems, the Bently Nevada 330500-02-05 (330500 Velomitor Piezo-velocity Sensor) provides direct electrical conversion of mechanical vibration into a conditioned velocity output for continuous monitoring and diagnostic functions.
Suffix Breakdown & Model Matrix
The supplied documentation identifies 330500-02-05 as a fixed catalog model. No official suffix definition or option matrix is provided in the available data; therefore, no suffix interpretation is included.
Hardware Specifications
Parameter
Specification
Model
330500-02-05
Brand
Bently Nevada
Product Type
Velomitor Piezo-velocity Sensor
Manufacturer
Bently Nevada
Origin
USA
Shipment Location
Xiamen, China
Weight
0.14 kg
Dimensions
2.5 x 2.5 x 7.3 cm (estimated shipping size)
Operating Temp
Not specified
Power Consumption
Not specified
Thread
M8 x 1
Sensitivity
3.94 mV/mm/s (100 mV/in/s) +/-5%
Velocity Range
1270 mm/s (50 in/s) peak
Amplitude Linearity
+/-2% to 152 mm/s (6 in/s) peak
Mounted Resonant Frequency
Greater than 12 kHz
Output Bias Voltage
-12 +/-3.0 VDC, overtemperature referenced to Pin A
Dynamic Output Impedance
Less than 2400 Ohm
Transverse Sensitivity
Less than 5% of rated sensitivity
Tariff Code
8537101190
Gap Voltage Validation and Mechanical Signal Integrity
Within Bently Nevada machinery monitoring architectures, vibration measurements are commonly evaluated together with eddy-current probe signals. During commissioning, proximity probe gap voltage is typically verified against the specified system target, commonly near -10 VDC where applicable to the associated probe system. The Velomitor sensor provides an independent piezoelectric velocity measurement and should be correlated with shaft displacement and rotor dynamic data during machine condition assessment. Proper cable routing and shielding help reduce electrical cross-talk between adjacent vibration channels.
Frequently Asked Questions
Q: Does the sensor support hot replacement while the monitoring system is energized? A: The available documentation does not specify hot-swap capability. Follow the maintenance procedure defined for the connected monitoring system before disconnecting or replacing the sensor.
Q: Is a specific output load required for accurate measurements? A: The sensor provides a dynamic output impedance of less than 2400 Ohm. The connected monitoring equipment should present an input impedance compatible with the manufacturer's interface requirements.
Q: Can this sensor be mounted in any orientation? A: Mechanical mounting orientation should follow the machine vibration measurement point defined by the monitoring design. The mounting surface should be rigid and free from looseness to maintain measurement accuracy.
Field Installation Guidelines
Verify that the M8 x 1 mounting interface is clean and mechanically secure before installation.
Route sensor cables separately from high-voltage power conductors to reduce electromagnetic interference.
Ground the cable shield according to the monitoring system grounding practice to minimize ground loop currents.
Avoid excessive cable bending, crushing, or tensile loading near the sensor body and connector.
Confirm sensor output and bias voltage after installation before placing the monitoring channel into service.
When used with shaft displacement measurements, validate sensor polarity and channel identification to ensure correct vibration analysis.
