Product Overview
The Bently Nevada 330905-05-08-10-12-00 is a 3300 NSv proximity probe designed for reliable vibration and position monitoring in critical rotating machinery. This industrial automation module replaces the earlier 3300 RAM probe while offering improved chemical resistance and superior side-view characteristics. The 330905-05-08-10-12-00 is mechanically and electrically interchangeable with previous 3300 RAM systems, making it a direct upgrade path for existing installations.
This specific configuration features an M10X1 thread without armor, a 50 mm unthreaded length, an 80 mm overall case length, and a 1.0 meter (39 in) total length. It comes with a miniature coaxial ClickLoc connector and FluidLoc cable, ensuring secure and reliable connections in demanding environments.
Technical Specifications
Key parameters of the Bently Nevada 330905-05-08-10-12-00 are listed below:
| Parameter |
Value |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) approximately -1 to -13 Vdc |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +12.5%/-20% including interchangeability error |
| 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 with up to 305 meters (1000 feet) of field wiring |
| Probe DC Resistance (1.0 m) |
4.2 ± 0.5 ohms |
| Extension Cable DC Resistance |
Center conductor: 0.220 Ω/m (0.067 Ω/ft); Shield: 0.066 Ω/m (0.020 Ω/ft) |
| Extension Cable Capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Field Wiring |
0.2 to 1.5 mm² (16 to 24 AWG) [0.25 to 0.75 mm² (18 to 23 AWG) with ferrules]; recommended three-conductor shielded triad cable; max length 305 m (1000 ft) |
| Target Size (flat target) |
Minimum: 8.9 mm (0.35 in) diameter; Recommended minimum: 13 mm (0.5 in) diameter |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable |
75 Ω coaxial, FEP insulated; lengths 0.5, 1, 5, or 7 meters |
| Recommended Torque |
Finger tight; Maximum torque 0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
M10x1, maximum thread engagement 15 mm |
| Connector-to-Connector Torque (M10X1 probe cases – first three threads) |
Maximum rated: 22.6 N•m (200 in•lb); Recommended: 7.5 N•m (66 in•lb) |
Industry Applications
The 330905-05-08-10-12-00 excels in process compressor applications where chemical resistance is critical. Its enhanced PPS tip and stainless steel case withstand harsh media, while the sealed design (Viton O-ring) prevents differential pressure leaks. Typical installations include:
- Centrifugal and reciprocating compressors in oil & gas facilities
- Steam and gas turbines in power generation
- Pumps and fans in petrochemical plants
The probe's superior side-view characteristics allow accurate gap measurements even when space is constrained, making it ideal for retrofits.
Installation & Setup Guidance
Proper installation is essential for reliable readings. Follow these guidelines:
- Mount the probe with the M10X1 thread into a properly tapped hole. Use only finger-tight torque initially, then tighten to a maximum of 0.56 N•m (5 in•lb) for the probe body.
- Ensure the target surface is clean and flat. For shafts smaller than 13 mm (0.5 in) diameter, expect scale factor changes; reduce the gap to compensate.
- Connect the ClickLoc connector securely and route the FluidLoc cable with a minimum bend radius of 25.4 mm (1.0 in) to avoid damage.
- For field wiring, use a three-conductor shielded triad cable with cross-section 0.2 to 1.5 mm² (16 to 24 AWG). Keep total cable length between the Proximitor and monitor within 305 meters (1000 feet) to maintain frequency response.
Maintenance & Reliability
Regular inspection of the probe tip and cable is recommended. Check for chemical attack or mechanical damage. The stainless steel case and PPS tip offer long service life, but verify the Viton O-ring seal periodically, especially in high-pressure applications. Although probes are not pressure-tested before shipment, you can request a custom pressure seal test from the manufacturer if required.
Because the 330905-05-08-10-12-00 is fully interchangeable with previous 3300 RAM probes, upgrading is straightforward and minimizes downtime. This translates to lower lifecycle costs and improved process availability.
Compatibility & Integration
The Bently Nevada 330905-05-08-10-12-00 works with all Bently Nevada 3300 XL NSv Proximitor Sensors and monitors. It is mechanically and electrically compatible with legacy 3300 RAM systems, ensuring seamless integration into existing condition monitoring architectures. The miniature coaxial ClickLoc connector ensures a secure, noise-immune connection.
Selection Guide & Purchasing Advice
Before ordering, verify your required unthreaded length, case length, total length, and connector type. This part number 330905-05-08-10-12-00 specifies a 50 mm unthreaded length, 80 mm case length, 1.0 m total length, and ClickLoc connector. Ensure these match your installation. PLC Source PRO offers this new, original factory-packed unit with a 12-month warranty, ready for immediate shipment.