Product Overview
The Bently Nevada 330903-00-12-05-02-CN is a 3300 NSv proximity probe designed for reliable vibration and position monitoring in rotating machinery. This industrial automation module offers enhanced chemical resistance compared to previous models, making it ideal for process compressor applications. With a 0.5-meter total length and a miniature coaxial ClickLoc connector, this probe delivers precise measurements in demanding environments.
Key Technical Specifications
| Parameter |
Value |
| Model |
330903 - 3300 NSv Probe, M8X1 thread, without armor |
| Unthreaded Length Option |
00 mm |
| Overall Case Length Option |
120 mm |
| Total Length Option |
0.5 meter (20 in) |
| Connector and Cable Type |
Miniature coaxial ClickLoc connector, standard cable |
| Agency Approval |
CN (Country Specific) |
| Probe DC Resistance (0.5m) |
4.0 ± 0.5 ohms |
| Extension Cable DC Resistance (Center Conductor) |
0.220 Ω/m (0.067 Ω/ft) |
| Extension Cable DC Resistance (Shield) |
0.066 Ω/m (0.020 Ω/ft) |
| Extension Cable Capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +12.5%/-20% |
| Deviation from Best Fit Straight Line (DSL) |
Less than ±0.06 mm (±2.3 mils) |
| Frequency Response |
0 to 10 kHz: +0, -3 dB typical |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable Specification |
75 Ω coaxial, FEP insulated, lengths 0.5, 1, 5, or 7 meters |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Maximum Torque |
0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Probe Case Thread |
M8x1 |
| Maximum Thread Engagement |
12 mm |
Performance and Reliability
The 330903-00-12-05-02-CN offers superior side-view characteristics compared to the 3000-series 190 probe when gapping at the same distance. Its increased chemical resistance over the 3300 RAM probe enables use in harsh process environments. The probe is mechanically and electrically compatible with previous 3300 RAM systems, ensuring seamless integration into existing setups.
Installation Guidance
When installing the Bently Nevada 330903-00-12-05-02-CN, ensure the target surface is clean and within the recommended minimum diameter of 13 mm (0.5 in) for flat targets. Apply finger-tight torque initially, then tighten to a maximum of 0.56 N•m (5 in•lb). Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable to prevent damage. For field wiring, use a three-conductor shielded triad cable with a maximum length of 305 meters (1,000 feet) between the Proximitor Sensor and the monitor.
Maintenance and Longevity
Regularly inspect the probe tip for contamination or wear, as this can affect measurement accuracy. The 330903-00-12-05-02-CN is designed to seal differential pressure between the probe tip and case using a Viton O-ring; verify the seal integrity periodically. Operate within the specified temperature range of -52°C to +177°C to ensure consistent performance. With proper care, this probe delivers reliable data for years, reducing downtime and maintenance costs.
Applications
-
Process Compressors: The enhanced chemical resistance makes it suitable for corrosive environments.
-
Turbomachinery: Monitor shaft vibration and axial position to prevent catastrophic failures.
-
Rotating Equipment: Ideal for pumps, motors, and fans requiring precise gap measurements.
Selection Guide
Before purchasing, confirm the unthreaded length, overall case length, and total length options match your application requirements. Verify the connector type (ClickLoc) and cable length are compatible with your existing system. For expert advice and genuine Bently Nevada parts, choose PLC Source PRO as your trusted supplier.