Product Overview

The Bently Nevada 330907-05-30-05-12-05 is a 3300 NSv reverse mount proximity probe. This probe has increased chemical resistance compared to the 3300 RAM probe. For process compressor applications, this enhanced resistance proves absolutely essential. The side-view characteristics of the 3300 NSv probe are also superior to those of the 3000-series 190 probe when gapping at the same distance from the target. The 330907-05-30 ordering code specifies M10x1 metric threads for this reverse mount configuration. Total length reaches 0.5 meter (20 inches) as indicated by option 05. Connector option 12 provides a miniature coaxial ClickLoc connector with FluidLoc cable. Agency approval option 05 specifies multiple approvals for hazardous areas. The 330907-05-30-05-12-05 uses gold-plated brass ClickLoc connectors throughout the transducer system. ClickLoc connectors lock into place and prevent the connection from loosening under vibration. The patented TipLoc molding method provides a robust bond between the probe tip and the probe body.

Technical Specifications

General Specifications

Electrical Specifications

Measurement Specifications

Mechanical Specifications

Temperature & Environmental Specifications

Reverse Mount Configuration with M10x1 Threads

The 330907-05-30-05-12-05 uses a reverse mount design with M10x1 metric threads. This thread size suits international mounting standards for many compressors. The reverse mount probe installs from the opposite side of the machine casing compared to standard probes. For applications with limited access to the measurement point, this design proves invaluable. Maximum thread engagement length for the M10x1 threads measures 15 mm for secure mounting. The probe case torque rating for reverse mount probes reaches 22.6 N•m (200 in•lb) maximum. For reliable operation without damage, Bently Nevada recommends 7.5 N•m (66 in•lb) of torque. Consequently, the 330907-05-30-05-12-05 installs securely without risk of thread stripping or case damage.

FluidLoc Cable Option (Option 12)

Connector option 12 provides a miniature coaxial ClickLoc connector with FluidLoc cable. The FluidLoc option prevents oil and other liquids from leaking out of the machine through the cable interior. For turbine and compressor applications where oil wicking along the cable is a concern, this feature proves absolutely essential. The FluidLoc cable maintains machine integrity while providing reliable measurement signals. Standard cable without FluidLoc may allow oil migration over time. Therefore, the 330907-05-30-05-12-05 is specifically recommended for oil-wetted installations.

ClickLoc Connector System

The 330907-05-30-05-12-05 uses a miniature coaxial ClickLoc connector with FluidLoc cable. Option 12 specifies this connector type for reliable signal transmission and fluid sealing. Gold-plated brass construction ensures excellent conductivity and corrosion resistance throughout. ClickLoc connectors lock into place with a positive engagement mechanism that technicians appreciate. Vibration cannot loosen a properly mated ClickLoc connection under normal operating conditions. For industrial machinery monitoring, this reliability proves absolutely essential for consistent measurements. The connector also provides environmental protection when mated to the corresponding extension cable.

Agency Approvals (Option 05)

The 05 approval option provides multiple certifications for the 330907-05-30-05-12-05. These approvals typically include CSA, ATEX, and IECEx certifications for hazardous areas. CSA certification covers North American hazardous locations completely. ATEX approval permits European Union installation without additional testing. IECEx certification satisfies international requirements for explosive atmospheres worldwide. For global machine builders and export projects, these approvals prove absolutely essential. One probe model serves many geographic markets simultaneously. The 330907-05-30-05-12-05 meets rigorous safety standards for global use in hazardous areas.

Chemical Resistance & Side-View Characteristics

The NSv probe offers increased chemical resistance compared to the 3300 RAM probe. For process compressor applications, this enhanced resistance allows use in aggressive environments safely. Many process compressors contain chemicals that would damage standard probes over time. The side-view characteristics of the 3300 NSv probe are also superior to those of the 3000-series 190 probe. When gapping the 330907-05-30-05-12-05 at the same distance from the probe target, side-view performance improves noticeably. Therefore, this probe provides more consistent measurements in tight mounting spaces where access is limited.

Measurement Characteristics

Linear range for the 330907-05-30-05-12-05 reaches 1.5 mm (60 mils) for standard operation. This linear range begins at approximately 0.25 mm (10 mils) from the target surface. The range extends from 0.25 to 1.75 mm (10 to 70 mils) for full linear measurement. Output voltage spans approximately -1 to -13 Vdc across this complete linear range. The recommended gap setting measures 1.0 mm (40 mils) for optimal system performance. For system calibration, always pair this probe with a matching NSv Proximitor Sensor. The 330907-05-30-05-12-05 delivers accurate, repeatable measurements within these specifications consistently.

DC Resistance Characteristics

Probe DC resistance for the 330907-05-30-05-12-05 measures 4.0 ± 0.5 ohms at 0.5 meter length. This resistance represents the path from the center conductor to the outer conductor. For troubleshooting purposes, measure this resistance to verify cable integrity. A significant deviation from this specification may indicate cable damage. The relatively low resistance ensures minimal signal loss over the 0.5 meter length. For longer runs, the Proximitor Sensor compensates for additional cable resistance automatically.

Temperature Limitations

Operating temperature spans -52°C to +177°C (-62°F to +351°F) for the 330907-05-30-05-12-05. Storage temperature matches this same wide range for maximum flexibility. However, a critical low-temperature note applies to this probe model. Exposing the probe to temperatures below -34°C (-30°F) for a sustained period may cause premature failure of the pressure seal. Therefore, avoid prolonged operation below -34°C whenever possible for reliable service. The probe sealing material consists of a Viton O-ring designed for differential pressure sealing between the probe tip and case. For cold environment applications, consider additional thermal protection or consult Bently Nevada for specific guidance.

Field Wiring Guidelines

Field wiring connects the 330907-05-30-05-12-05 system to monitoring equipment at a distance. Wire gauge should measure 0.2 to 1.5 mm² (16 to 24 AWG) for standard connections. With ferrules, use 0.25 to 0.75 mm² (18 to 23 AWG) instead for secure termination. Bently Nevada recommends using three-conductor shielded triad cable for optimal noise rejection. Maximum length between the 3300 XL NSv Proximitor Sensor and the monitor reaches 305 meters (1,000 feet). Signal rolloff occurs at high frequencies when using longer field wiring lengths beyond this recommendation. Consult the frequency response graphs (Figure 16 and Figure 17) for specific rolloff characteristics at various frequencies. The 330907-05-30-05-12-05 maintains signal integrity within these published guidelines.

Installation Guidelines

Follow these steps for proper installation of the 330907-05-30-05-12-05.

1. Prepare the M10x1 threaded hole in the machine casing.

2. Clean the threads thoroughly to remove any debris, oil, or old sealant.

3. Apply anti-seize compound to the probe threads for corrosion protection.

4. Thread the probe into the hole by hand until finger-tight initially.

5. Tighten to 7.5 N•m (66 in•lb) recommended torque. Do not exceed 22.6 N•m.

6. Connect the miniature coaxial ClickLoc connector to the extension cable. Verify the FluidLoc seal engages properly.

7. Set the probe gap to 1.0 mm (40 mils) recommended starting point.

8. Verify the Viton O-ring seals properly by checking for any leaks.

Note: The 330907-05-30-05-12-05 requires protection from sustained temperatures below -34°C (-30°F). Do not exceed 22.6 N•m mounting torque under any circumstances. The 05 approval option provides multiple hazardous area certifications.

Packaging List

• One Bently Nevada 330907-05-30-05-12-05 NSv Reverse Mount Probe

• One miniature coaxial ClickLoc connector with FluidLoc cable (attached)

• One product calibration certificate

• One anti-static protective bag

Common FAQs

1. What is the length of the 330907-05-30-05-12-05?

This probe measures 0.5 meter (20 inches) in total length. The 05 option code specifies this particular short length. Other lengths are available with different option codes. For example, 10 indicates 1.0 meter for longer runs. Choose the length that matches your probe-to-Proximitor distance. The 330907-05-30-05-12-05 with 05 suits installations where the Proximitor mounts very close to the probe.

2. What is the FluidLoc cable option on the 330907-05-30-05-12-05?

Connector option 12 provides FluidLoc cable with the miniature coaxial ClickLoc connector. The FluidLoc option prevents oil and other liquids from leaking out of the machine through the cable interior. For turbine and compressor applications with oil-wetted environments, this feature proves absolutely essential. Standard cable without FluidLoc may allow oil migration over time. The 330907-05-30-05-12-05 is specifically recommended for oil-wetted installations.

3. What approvals does the 05 option provide on the 330907-05-30-05-12-05?

The 05 approval option includes multiple certifications such as CSA, ATEX, and IECEx. CSA covers North American hazardous locations thoroughly. ATEX permits European Union installation without additional testing. IECEx satisfies international explosive atmosphere requirements globally. For worldwide applications in hazardous areas, the 330907-05-30-05-12-05 with 05 approval meets multiple regulatory standards.

4. What is the linear range of the 330907-05-30-05-12-05?

Linear range measures 1.5 mm (60 mils) for standard operation. This range begins at approximately 0.25 mm (10 mils) from the target surface. Linear range extends from 0.25 to 1.75 mm (10 to 70 mils) completely. Output voltage spans approximately -1 to -13 Vdc across this full range. The recommended gap setting is 1.0 mm (40 mils) for optimal system performance.

5. What is the low temperature limitation for the 330907-05-30-05-12-05?

Operating temperature spans -52°C to +177°C nominally for this probe. However, exposing the probe to temperatures below -34°C (-30°F) for a sustained period may cause premature pressure seal failure. The Viton O-ring seal becomes brittle at very low temperatures over time. For sustained cold operation below -34°C, consult Bently Nevada for application guidance. The 330907-05-30-05-12-05 requires careful temperature management in extreme cold environments.

Why Choose This Probe?

The Bently Nevada 330907-05-30-05-12-05 delivers reliable NSv reverse mount measurement for hazardous area process compressor applications. Increased chemical resistance allows use in aggressive environments where RAM probes would fail prematurely. Superior side-view characteristics improve gapping accuracy at standard distances significantly. M10x1 metric threads suit international mounting requirements perfectly. FluidLoc cable prevents oil leakage through the cable interior. Multiple approvals (option 05) satisfy global hazardous area requirements. For reverse mount applications requiring 0.5 meter length, FluidLoc sealing, and hazardous area certifications, choose the 330907-05-30-05-12-05.