The Bently Nevada 330500-07-CN Velomitor Piezo-velocity Sensor offers accurate vibration measurements for rotating machinery. You can use this sensor in turbines, compressors, and pumps. Its piezoelectric design provides a direct velocity output without external signal conditioning.
This sensor delivers a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5% at room temperature. The frequency response reaches from 4.5 Hz to 5 kHz (270 cpm to 300 kcpm) within ±3.0 dB. For more critical applications, the response from 6.0 Hz to 2.5 kHz (360 cpm to 150 kcpm) stays within ±0.9 dB.
The velocity range goes up to 1270 mm/s (50 in/s) peak. Additionally, the amplitude linearity holds ±2% up to 152 mm/s (6 in/s) peak. The mounted resonant frequency exceeds 12 kHz, which prevents unwanted signal interference.
Furthermore, the output bias voltage measures -12 ±3.0 VDC referenced to Pin A. Dynamic output impedance stays below 2400 Ω. The broadband noise floor from 4.5 Hz to 5 kHz is only 0.004 mm/s (160 μin/s) rms nominal.
The Bently Nevada 330500-07-CN operates between -55°C and 121°C (-67°F to 250°F). It survives shocks up to 5,000 g peak. Relative humidity can reach 100% non-submerged because the case is hermetically sealed.
Base strain sensitivity equals 0.005 in/s/mstrain. Magnetic field susceptibility stays below 51 min/s/gauss at 50 gauss, 50-60Hz. Therefore, this sensor performs reliably even near motors or generators.
This sensor weighs 142 grams (5.0 oz) typical. Its diameter is 25.3 mm (0.995 in), and height is 63.2 mm (2.49 in). The case uses 316L stainless steel for excellent corrosion resistance.
The connector is a 2-pin Mil-C-5015 hermetic type with a 316L stainless steel shell. Maximum mounting torque should be 32-46 kg cm (24-40 in-lb). Polarity rules: when the sensor case moves toward the connector, Pin A becomes positive relative to Pin B.
You can install the Bently Nevada 330500-07-CN using the 3/8-16 UNC mounting thread. Ensure the mounting surface is clean and flat. Apply the recommended torque to avoid damaging the sensor or getting false readings.
The maximum cable length reaches 305 metres (1,000 feet) using part number 02173006 without signal degradation. However, for a 50g vibration at 10 kHz with 200 pF/m cable capacitance, Bently Nevada recommends a 208 ft (63m) cable length.
Grounding is case isolated, which helps prevent ground loops. Always follow the installation drawing 167537 for hazardous area setups.
This sensor carries multiple certifications. For intrinsic safety, it has 330500 Ex ia IIC T4 and AEx ia IIC T4. It suits Class I, Division 1, Groups A, B, C, D, plus Class II Groups E, F, G, and Class III.
Moreover, for non-incendive operation, it meets Ex nL IIC T4 and AEx nA IIC T4 for Class I, Div 2, Groups A, B, C, D. The temperature code is T4 from -40°C to 100°C ambient.
The Bently Nevada 330500-07-CN complies with FCC Part 15. It also meets EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU. For maritime use, it follows DNV rules for ships, high-speed craft, and offshore standards.
1 x Bently Nevada 330500-07-CN Velomitor Piezo-velocity Sensor
1 x Protective plastic cap for connector
1 x Installation instruction sheet (drawing reference 167537)
1. Can I use the 330500-07-CN sensor in sub-zero temperatures?
Yes, it operates from -55°C to 121°C. Therefore, freezing environments are perfectly acceptable.
2. What happens if I exceed the mounting torque?
Exceeding 46 kg cm (40 in-lb) may damage the sensor or distort its case. Always stay within the specified torque range.
3. Do I need an external amplifier for this sensor?
No. The Bently Nevada 330500-07-CN outputs a direct velocity signal without extra amplification.
4. How do I know which pin is positive?
When the sensor case moves toward the connector, Pin A becomes positive relative to Pin B.
5. Which courier do you use for shipping?
We ship via FedEx, UPS, or DHL to ensure fast and tracked delivery worldwide.
| Brand Name | Bently Nevada |
| Model No. | 330500-07-CN |
| Product Type | Piezo-velocity Sensor |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
