The Bently Nevada 330500-01-00, also cataloged as the 330500 Velomitor Piezo-velocity Sensor, operates as a dedicated hardware component for measuring absolute vibration velocity of bearing housings, machine casings, and structural members within Bently Nevada machinery condition monitoring systems. The sensor converts mechanical vibration into a conditioned voltage output through an embedded piezoelectric sensing element and integrated electronics.
Suffix Breakdown & Model Matrix
The available ordering information defines the following suffix options for this model:
Option
Description
01
1/2 - 20 UNF mounting thread
00
No additional option required
No further model matrix information is provided in the available technical data.
Hardware Specifications
Parameter
Specification
Model
330500-01-00
Brand
Bently Nevada
Product Type
Velomitor Piezo-velocity Sensor
Origin
USA
Manufacturer
Bently Nevada
Dimensions
7.2 x 2.4 x 2.4 cm
Weight
0.16 kg
Operating Temp
Not specified
Power Consumption
Not specified
Mounting Thread
1/2 - 20 UNF
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
Transverse Sensitivity
Less than 5% of sensitivity
Mounted Resonant Frequency
Greater than 12 kHz
Dynamic Output Impedance
Less than 2400 Ohm
Output Bias Voltage
-12 +/- 3.0 VDC referenced to Pin A
Orientation
May be mounted at any angle
Sensor Construction
Piezoelectric element with embedded electronics
Mechanical Design
Solid-state, no moving parts
Rotor Dynamics Signal Measurement
The 330500 Series is intended for machinery vibration monitoring using a solid-state piezoelectric sensing element rather than a moving-coil mechanism. Because the sensing assembly contains no moving mechanical components, installation orientation does not affect normal operation. The sensor measures absolute vibration velocity relative to free space for machine casing and bearing housing monitoring.
Within Bently Nevada monitoring systems, vibration measurements from Velomitor sensors can be evaluated together with proximity probe channels that monitor shaft displacement. During commissioning, proximity probe channels are commonly validated against gap voltage targets near -10 VDC to confirm proper probe positioning before rotor dynamic measurements are placed into service. The vibration and displacement channels operate as complementary measurements within the overall machinery protection system.
Frequently Asked Questions
Q: Does the sensor contain moving mechanical components? A: No. The sensor uses a piezoelectric sensing element with embedded electronics and a solid-state construction without moving parts.
Q: Can the sensor be installed in any mounting orientation? A: Yes. The available technical documentation states that the sensor may be mounted vertically, horizontally, or at any other orientation.
Q: Is hot-swapping supported while the monitoring channel is energized? A: The available documentation does not specify hot-swap capability. Sensor replacement should follow the shutdown and isolation procedures defined for the connected monitoring system.
Field Installation Guidelines
Verify that the mounting surface is clean, flat, and mechanically rigid before installing the sensor.
Use the specified 1/2 - 20 UNF mounting thread and apply the manufacturer's recommended installation torque if available in the service manual.
Route signal cables separately from high-voltage and variable-frequency drive power cables to reduce electromagnetic interference.
Maintain cable shielding continuity and terminate the shield according to the monitoring system grounding practice.
Confirm connector pin assignments before energizing the monitoring channel.
After installation, verify sensor output and monitoring channel response through the associated Bently Nevada monitoring system before returning equipment to operation.
