Product Name: Low Frequency Velocity Sensor
Brand Name: Bently Nevada
Model Number: 330505-01-02-02
Place of Origin: United States
Warranty: 12 Months
Whatsapp：+86 18020776782
Email：[email protected]
Alternative Names
330505 Low Frequency Velocity Sensor
Bently Nevada 330505 Vibration Sensor
Low-Speed Velocity Transducer
Moving-Coil Velocity Sensor
2-wire Velocity Pickup for machinery monitoring
The Bently Nevada 330505-01-02-02 Low Frequency Velocity Sensor is designed to measure absolute vibration in low-speed rotating machinery by detecting velocity levels of machine components such as bearing housings and stator frames. Using moving-coil technology, it generates a voltage output proportional to vibration velocity, enabling accurate monitoring of mechanical condition and early fault detection in critical equipment like hydroelectric turbines.
This 330505-01-02-02 Low Frequency Velocity Sensor is manufactured by Bently Nevada and belongs to the 330505 series. It features a sensitivity of 20 mV/mm/s (508 mV/in/s) ±10% and operates over a frequency range of 0.5 to 1000 Hz (30 to 60,000 cpm), with tighter accuracy between 1 and 200 Hz. The velocity measurement range reaches up to 102 mm/s (4 in/s) peak with ±3% amplitude linearity. It requires no external power beyond its output bias voltage of -12 ±1 VDC and supports cable lengths up to 305 meters without signal degradation when used with compatible systems. The sensor operates within a temperature range of -40°C to +100°C and is constructed with a hermetically sealed stainless steel housing. Mechanically, it includes a 3/8-24 UNF mounting thread, M8 adapter option, and a 2-pin Mil-C-5015 connector.
The Bently Nevada 330505-01-02-02 Low Frequency Velocity Sensor is specifically engineered for monitoring low-frequency vibration in slow-speed machinery where traditional high-frequency sensors are less effective. Its rugged, hermetically sealed stainless steel construction ensures reliable performance in harsh industrial and high-humidity environments, including hydroelectric power plants. The sensor’s moving-coil design provides a stable, proportional voltage output without requiring complex signal conditioning, making it suitable for direct integration into monitoring systems. With flexible mounting options and strong environmental resistance, it is widely used for measuring vibration in bearing housings, stator structures, and other critical components in low-speed applications.
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| Product Name | Bently Nevada 330505-01-02-02 Low Frequency Velocity Sensor |
| Manufacturer | Bently Nevada |
| Product Type | Low Frequency Velocity Sensor |
| Part Number | 330505-01-02-02 |
| Dimensions | 9.5x3.2x3.2cm |
| Weight | 0.34kg |
| Place of shipment | Xiamen, China |
| Country of origin | USA |
| Transducer Mounting Angle | -01 - 0° ± 10° |
| Internal Mounting Thread | -02 - 3/8-24 UNF-2B |
| Mounting Adapter Option | -02 - M8 x 1 |
| Housing | 316L stainless steel, hermetically sealed. |
| Output | 2-wire (moving-coil) |
| Sensitivity | : 20 mV/mm/s (508 mV/in/s) ±10% |
| Frequency Response | 0.5 – 1000 Hz (30 – 60,000 cpm) ±3.0 dB、1 – 200 Hz (60 – 12,000 cpm) ±0.9 dB |
| Velocity Range | 102 mm/s (4 in/s) peak |
| Amplitude Linearity | ±3% to 102 mm/s (4 in/s) peak |
| Output Bias Voltage | -12 ±1 VDC |
| Maximum Cable Length | 305 metres (1000 ft) without signal degradation (when used with 3500/46M) |
| Case Material | 300 Series Stainless Steel |
| Connector | 2-pin Mil-C-5015, hermetically sealed, stainless steel shell |
| Operating & Storage Temperature Range | -40°C to +100°C (-40°F to +212°F) |
| Maximum Mounted Surface Temperature | +100°C (+212°F) |
| Shock Survivability | 981 m/s² (100g) peak |
| Relative Humidity | To 100% non-submerged, hermetically sealed case |
Hydroelectric turbines and generators
Low-speed rotating machinery
Bearing housing vibration monitoring
Stator core and frame vibration measurement
Power generation equipment condition monitoring
Industrial machinery operating at low frequencies
Harsh environments with high humidity or temperature variations
Developed by Bently Nevada for low-frequency vibration measurement
Moving-coil technology providing voltage output proportional to velocity
High sensitivity: 20 mV/mm/s (508 mV/in/s) ±10%
Wide frequency response: 0.5 to 1000 Hz with high accuracy in low-frequency range
Velocity range up to 102 mm/s (4 in/s) peak with ±3% linearity
Rugged, hermetically sealed stainless steel housing for durability
Operates in harsh environments (-40°C to +100°C)
2-wire output design for simple installation and integration
Long cable capability up to 305 meters without signal degradation (with compatible systems)
Flexible mounting options (3/8-24 UNF thread with M8 adapter option)
High shock resistance (up to 100g) and suitable for demanding industrial applications
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