Product Overview
The Bently Nevada 330195-02-12-05-CN 3300 XL 8 mm Proximity Probe (Reverse Mount) is engineered for precise vibration and position monitoring in extreme industrial conditions. Part of the proven 3300 XL series, this probe delivers stable performance under wide temperature swings, high humidity, and mechanical stress. With a polyphenylene sulfide (PPS) tip and stainless steel case, the 330195-02-12-05-CN resists corrosion and wear, making it ideal for critical rotating machinery.
Technical Specifications
All values are directly from the product datasheet for the 330195-02-12-05-CN. No inferred or assumed parameters are included.
-
Total Length: 0.5 meter (1.6 feet)
-
Thread: 3/8-24 UNF, maximum thread engagement 0.563 inches
-
DC Resistance: RPROBE = 7.45 Ohm ± 0.50 Ohm for the 0.5 m probe
-
Probe Tip Material: Polyphenylene sulfide (PPS)
-
Probe Case Material: AISI 303 or 304 stainless steel
-
Humidity Stability: Less than 3% change in Average Scale Factor after 56 days at 93% RH per IEC 68-2-3
-
Standard Temperature Range: -52°C to +177°C (-62°F to +350°F) operating and storage
-
Extended Temperature Range: Tip -52°C to +218°C; cable/connector -51°C to +260°C
-
Agency Approval: CN Country Specific
Real-World Applications
The 330195-02-12-05-CN excels in environments where temperature and moisture extremes threaten measurement accuracy. In gas turbines and compressors operating near coastal areas, the probe's humidity resistance (less than 3% ASF drift) ensures reliable data over long monitoring periods. For steam turbines in power plants, the extended temperature range accommodates high ambient heat near the bearings without compromising the pressure seal—a common failure point in lower-rated probes.
Installation and Setup Guidance
When installing the 330195-02-12-05-CN, ensure the 3/8-24 UNF thread is engaged no deeper than 0.563 inches to avoid mechanical binding or internal damage. The probe is designed to seal differential pressure between tip and case using a Viton O-ring; however, it is not pressure-tested before shipment. If your application requires a tested pressure seal, contact the custom design department. Avoid exposing the probe to temperatures below -34°C during installation or operation, as this may cause premature failure of the pressure seal.
Maintenance and Reliability
To maximize service life, inspect the Viton O-ring and probe case for signs of wear or corrosion periodically, especially in humid or chemically aggressive atmospheres. The stainless steel case (AISI 303/304) offers good general corrosion resistance but should be cleaned with mild solvents if contaminated. The probe's humidity-tested design (IEC 68-2-3) minimizes signal drift, reducing the need for frequent recalibration. Replacing the probe at scheduled intervals—rather than after failure—prevents unplanned downtime and costly repairs.
Troubleshooting Common Issues
If the 330195-02-12-05-CN exhibits erratic readings, first verify the ambient temperature: exposure below -34°C can damage the pressure seal, leading to moisture ingress and signal instability. Check the DC resistance at the connector; it should measure 7.45 Ohm ± 0.50 Ohm. A significant deviation may indicate a damaged cable or internal short. For applications with high humidity, confirm the Average Scale Factor remains within the 3% threshold; if not, re-evaluate the probe location or consider an extended temperature variant. Contact Bently Nevada support for detailed diagnostics.
Selection Guide
Before purchasing the Bently Nevada 330195-02-12-05-CN, verify the total length needed (0.5 m standard) and ensure the agency approval option (CN Country Specific) matches your region. For applications exceeding the standard temperature range, consider the extended temperature option available in the 3300 XL series. PLC Source PRO stocks this exact model—part 330195-02-12-05-CN—and can assist with compatibility verification for your control system.