Description
Are your critical rotating assets protected against unexpected radial vibration or axial thrust failures? In high-speed turbomachinery, sub-millimeter displacement can mean the difference between normal operation and a catastrophic shaft wreck. The Bently Nevada 330105-02-12-10-02-CN, a member of the industry-standard 3300 XL 8mm Proximity Transducer System, delivers precise non-contact shaft measurement.
For critical machinery protection loops, we maintain this probe in New Original (Factory Sealed) condition, accompanied by a 1-year warranty. Lead times typically run 1 to 2 business days for in-stock units.
Technical Specifications
- Parameter: Value
- Probe Tip Diameter: 8 mm
- Thread Type & Size: 3/8-24 UNF thread, reverse mount
- Unthreaded Length (Option -02): 0.2 inches
- Overall Case Length (Option -12): 1.2 inches
- Total Length (Option -10): 1.0 meter (3.3 feet)
- Connector Option (Option -02): Miniature coaxial ClickLoc connector, standard cable
- Agency Approval (Option -CN): RoHS / CCC / China Ex zone approvals for hazardous areas
- Linear Range: 2.0 mm (80 mils), starting at approximately 0.25 mm (10 mils) from the target
- Operating Temperature: Probe tip and cable operate at −51 to +177 °C (−60 to +350 °F)
Field Performance & Application Notes
Having commissioned dozens of 3300 XL probe loops on steam turbines and centrifugal compressors, this specific reverse-mount configuration (330105) is ideal for mounting inside bearing housings where space is extremely tight. The short 1.2-inch case length allows it to sit flush inside specialized brackets. However, watch out for a frequent installation pitfall: during installation, you must physically measure the gap with a physical feeler gauge or monitor the DC bias voltage on your 3300 XL Proximitor Sensor to set the correct mid-scale gap of approximately -10 V DC.
Do not install this standard 8mm probe if you are trying to measure targets smaller than 15.2 mm (0.6 inches) in diameter. In those tight-radius environments, you must specify a 5mm probe to prevent magnetic field wrapping and signal distortion.
Strategic Pros & Cons
- Pro: ClickLoc connector is highly resistant to pulling and vibrations, preventing intermittent disconnects in harsh industrial environments.
- Pro: Fully compliant with API 670 standards for machinery protection systems.
- Con: Reverse-mount housing requires accessing the inside of the bearing casing to replace or adjust the physical probe.
- Con: The -CN approval code restricts sourcing options when matching legacy European or North American agency approvals.
Quick Conclusions
- Ideal for tight, internal bearing housing applications requiring API 670 compliance.
- Requires a matching 3300 XL Proximitor Sensor and extension cable to form a calibrated 5-meter or 9-meter system.
- Delivers exceptional thermal stability across its full operational temperature range.
FAQ
- What does the “-CN” suffix represent? The -CN suffix indicates that the product carries certifications for the Chinese market, including specific hazardous area and environmental compliances.
- Can I connect this 1.0-meter probe directly to a monitor? No. Proximity probes require a matching extension cable and a Proximitor sensor (such as a 3300 XL 5m or 9m system) to output a usable 200 mV/mil signal to your vibration monitor.
- Can I mix this probe with older, non-XL 3300 Proximitor sensors? While technically compatible, mixing 3300 XL probes with non-XL components degrades the system’s temperature stability and linearity specifications.
