Bently Nevada 330906-02-12-70-02-CN 3300 NSv Reverse Mount Probe
Product Introduction
The Bently Nevada 330906-02-12-70-02-CN belongs to the 3300 NSv series. Manufacturers use this reverse mount probe in tough compressor applications. Its chemical resistance exceeds that of the standard 3300 RAM probe. This model also provides better side-view performance than the 3000-series 190 probe. You can gap it at the same distance from the target with improved reliability.
Technical Specifications
The Bently Nevada 330906-02-12-70-02-CN uses 3/8-24 UNF threads. Its total length option is 70, which means 7.0 meters (23.0 feet). The connector option 02 is a miniature coaxial ClickLoc connector with standard cable.
Agency approval option CN indicates country-specific compliance. The probe case material is AISI 304 stainless steel (SST). Its tip uses polyphenylene sulfide (PPS).
Probe DC resistance from center conductor to outer conductor is 5.9 ± 0.9 ohms for the 7.0m length.
Linear range spans 1.5 mm (60 mils). It starts at approximately 0.25 mm (10 mils) from the target. The full range runs from 0.25 to 1.75 mm (10 to 70 mils), which equals roughly -1 to -13 Vdc.
Recommended gap setting is 1.0 mm (40 mils).
Mechanical & Environmental Parameters
This probe operates from -52°C to +177°C (-62°F to +351°F). Storage temperature matches the same range. However, exposing the probe below -34°C (-30°F) for long periods may damage the pressure seal.
Maximum rated torque for the probe case is 33.9 N•m (300 in•lb). The recommended torque is 11.3 N•m (100 in•lb).
The probe seals differential pressure between tip and case. A Viton O-ring provides this sealing function. Maximum thread engagement length for M10x1 threads is 15 mm.
System weight typically ranges from 14 to 150 g (0.5 to 5.3 oz).
Field Wiring & Installation Guide
For field wiring, use 0.2 to 1.5 mm² (16 to 24 AWG) wire. If you use ferrules, choose 0.25 to 0.75 mm² (18 to 23 AWG). We recommend a three-conductor shielded triad cable.
The maximum cable length between the 3300 XL NSv Proximitor Sensor and the monitor is 305 meters (1,000 feet). Additionally, check the frequency response graphs for signal rolloff at high frequencies when using longer wiring.
ClickLoc connectors lock into place and prevent loosening. The patented TipLoc molding method creates a strong bond between the probe tip and body. All transducer system components include gold-plated brass ClickLoc connectors.
Therefore, follow these steps during installation:
First, verify the target surface is clean and smooth.
Next, set the gap to 1.0 mm (40 mils) for optimal performance.
Then, apply torque to 11.3 N•m (100 in•lb) only.
Finally, secure the ClickLoc connector until it clicks.
Packaging List
1 x Bently Nevada 330906-02-12-70-02-CN probe assembly (7.0m cable)
1 x Miniature coaxial ClickLoc connector (pre-installed)
1 x Installation guide (printed)
Note: No certificates or warranty statements are included.
Shipping method: Fedex, UPS, DHL
Frequently Asked Questions (FAQ)
1. Can I use the 330906-02-12-70-02-CN in place of a 3300 RAM probe?
Yes, you can. This Bently Nevada 330906-02-12-70-02-CN offers better chemical resistance, making it suitable for process compressor applications where the RAM probe may fail.
2. What happens if I exceed the recommended torque?
Exceeding 11.3 N•m may damage the probe case or threads. The maximum rated torque is 33.9 N•m, but staying at the recommended value ensures reliable sealing.
3. How do I know the ClickLoc connector is fully engaged?
You will hear a distinct "click" sound. Additionally, the connector will not pull apart when lightly tugged.
4. Does low temperature affect probe performance?
Prolonged exposure below -34°C (-30°F) can prematurely fail the pressure seal. However, the probe still operates down to -52°C for shorter periods.
5. What is the advantage of the reverse mount design?
The reverse mount design simplifies installation in tight spaces. Furthermore, it improves side-view characteristics when gapping at the same distance from the target.
