Product Overview
The Bently Nevada 330903-00-03-70-02-00 is a 3300 NSv proximity probe engineered for precise vibration and position monitoring in critical rotating machinery. This industrial automation module delivers reliable performance in process compressors, turbines, and pumps where chemical resistance and accuracy are essential.
With a total length of 7.0 meters (23.0 feet) and a miniature coaxial ClickLoc connector, this probe integrates seamlessly into existing Bently Nevada monitoring systems. The 330903-00-03-70-02-00 is mechanically and electrically interchangeable with previous 3300 RAM probes, offering an easy upgrade path.
Key Specifications
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Linear Range: 1.5 mm (60 mils), from 0.25 to 1.75 mm
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Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) ±12.5%/-20%
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Deviation from Best Fit Straight Line (DSL): Less than ±0.06 mm (±2.3 mils)
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Frequency Response: 0 to 10 kHz, +0/-3 dB typical
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Probe DC Resistance: 5.9 ± 0.9 ohms (center to outer conductor)
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Operating Temperature: -52°C to +177°C (-62°F to +351°F)
Technical Specifications
| Parameter |
Value |
| Probe Type |
3300 NSv, M8X1 thread, without armor |
| Unthreaded Length |
0 mm |
| Overall Case Length |
30 mm |
| Total Length |
7.0 meters (23.0 feet) |
| Connector |
Miniature coaxial ClickLoc, standard cable |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Cable |
75 Ω coaxial, FEP insulated |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Maximum Torque |
0.56 N·m (5 in·lb) |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
Industry Applications
The 330903-00-03-70-02-00 excels in process compressor applications where chemical resistance is critical. Its increased chemical resistance over the 3300 RAM probe allows reliable operation in harsh environments. Use it for radial vibration and axial position monitoring on turbines, compressors, and large pumps.
In retrofit scenarios, this probe replaces older 3300 RAM models without requiring mechanical changes, minimizing downtime. The superior side-view characteristics ensure accurate gapping even at close distances.
Installation & Setup
Install the 330903-00-03-70-02-00 with finger-tight torque and a maximum of 0.56 N·m (5 in·lb). For M8X1 threads, use a maximum engagement length of 12 mm. Maintain a minimum bend radius of 25.4 mm (1.0 in) on the cable to prevent damage.
For field wiring, use a three-conductor shielded triad cable with 0.2 to 1.5 mm² (16 to 24 AWG) conductors. The maximum cable length between the Proximitor Sensor and monitor is 305 meters (1,000 feet). Ensure the target is at least 8.9 mm (0.35 in) in diameter; a 13 mm (0.5 in) target is recommended for consistent scale factor.
Maintenance & Reliability
The 330903-00-03-70-02-00 is built for long service life with a stainless steel case and PPS tip. Regularly inspect the cable for abrasion or kinks, especially near bend points. Verify the connector torque periodically to maintain signal integrity.
With a wide operating temperature range of -52°C to +177°C, this probe withstands extreme conditions. The Viton O-ring seals differential pressure between the tip and case, but probes are not pressure-tested before shipment—contact the custom design department if pressure testing is required.
Compatibility & Integration
The 330903-00-03-70-02-00 is fully compatible with Bently Nevada 3300 XL NSv Proximitor Sensors and monitors. It is mechanically and electrically interchangeable with previous 3300 RAM probes and extension cables, simplifying upgrades.
Extension cable specifications include a center conductor DC resistance of 0.220 Ω/m (0.067 Ω/ft) and capacitance of 69.9 pF/m (21.3 pF/ft) typical. This ensures consistent performance across long cable runs.
Selection Guide
Before purchasing, verify your mounting thread (M8X1), required total length, and connector type. The 330903-00-03-70-02-00 includes a 12-month factory warranty and ships in original packaging. PLC Source PRO ensures authentic Bently Nevada parts for your critical systems.