330101-00-20-05-02-00 is a Bently Nevada 3300 XL series standard eddy current probe with a total length of 0.5 meter (1.6 feet). This model features 3/8-24 UNF threads, 0.0‑inch unthreaded length, 2.0‑inch overall case length, a standard ClickLoc coaxial connector, and standard FEP‑insulated cable. It does not include armor or hazardous area approvals. Its most notable features are the 2.0‑inch (approx. 50.8 mm) extra‑long case combined with the 0.5 m short total length, specifically designed for long‑distance monitoring applications requiring very deep threaded mounting holes and a 9‑meter system.
With a total length of 0.5 m, this probe must be paired with an 8.5‑meter extension cable (e.g., 330130-085-00-00) to form a complete 9‑meter system (0.5 m probe + 8.5 m extension cable = 9 m system). It is ideal for large rotating machinery monitoring where the Proximitor Sensor must be located far from the probe (e.g., between a control room and field equipment), while the mounting hole depth requirements are very demanding.
Model Breakdown: 330101-00-20-05-02-00 Configuration Details
Following Bently Nevada’s part number coding system (refer to datasheet Pages 13-14), the fields in this model number represent the following:
Field | Code | Parameter | Description |
Base Model | 330101
| 3300 XL 8 mm Probe, 3/8-24 UNF thread, without armor | Compatible with 3300 XL 8 mm and 3300 5 mm systems |
Unthreaded Length (A) | 00
| 0.0 inches | Distance from probe tip to start of thread; shortest configuration |
Overall Case Length (B) | 20
| 2.0 inches | Total threaded length (code 20 = 2.0 inches) |
Total Length Option (C) | 05
| 0.5 meter (1.6 ft) | Total probe cable length (including connector); for 9 m systems |
Connector & Cable Option (D) | 02
| Miniature coaxial ClickLoc connector, standard cable | Standard FEP‑insulated cable, gold‑plated ClickLoc connector |
Agency Approval (E) | 00
| Not required | Standard industrial version for non‑hazardous areas |
Key Configuration Note: The defining features of this model are the 2.0‑inch extra‑long case combined with the 0.5 m short total length. The 2.0‑inch case is suitable for very deep mounting holes (e.g., thick‑walled housings or equipment with heavy insulation). The 0.5 m total length is for 9‑meter systems (must be paired with an 8.5 m extension cable). The unthreaded length is 0.0 inches, meaning the thread starts immediately after the probe tip. This model has no armor or hazardous area approvals, making it suitable for standard industrial environments.
Application Scenarios & Selection Guide
330101-00-20-05-02-00 is suitable for the following typical applications:
Precise Total Length Matching for 9‑Meter Systems: This 0.5 m probe must be paired with an 8.5‑meter extension cable (e.g., 330130-085-00-00) to form a complete 9‑meter system (0.5 m + 8.5 m = 9 m). Ideal for long‑distance signal transmission where the Proximitor Sensor is mounted in a remote control room or cabinet and the probe is installed on the equipment.
Installations Requiring Very Deep Thread Engagement: The 2.0‑inch case length (approx. 50.8 mm) is one of the longest options in the 330101 series, suitable for extremely deep mounting holes or very thick equipment walls, such as turbine casings with heavy insulation, large compressor housings, or special mounting adapters.
Radial Vibration Monitoring: Suitable for shaft vibration measurement on large turbomachinery, compressors, generators, and pumps.
Axial Position (Thrust) Monitoring: Can be used to measure rotor axial position and monitor thrust bearing wear.
Keyphasor / Speed Measurement: Can serve as a Keyphasor probe to provide speed reference signals.
Standard Industrial Environments: No armor, no hazardous area approvals – suitable for non‑hazardous, dry, clean installations.
Selection Notes:
Total Length Matching: Probe length + extension cable length = Proximitor Sensor total system length (5 m or 9 m). This 0.5 m probe must be used with an 8.5‑meter extension cable to form a 9‑meter system. Do not pair it with a 4.0 m cable (that would create a 4.5 m system, which does not match standard Proximitor lengths).
System Accuracy: The 9‑meter system has a larger linear deviation (DSL) of < ±0.038 mm compared to ±0.025 mm for 5‑meter systems. For extremely high accuracy requirements, consider using a 5‑meter system.
Case Length Selection: This model has a 2.0‑inch case length, which is among the longest options. Before installation, carefully measure the effective thread depth of the mounting hole. Important: The datasheet maximum recommended thread engagement is 0.563 inches. The 2.0‑inch case is not meant to be fully threaded into the hole; the extra length accommodates the depth of the mounting hole. The actual engagement should be limited to ≤0.563 inches using the lock nut and washers. Exceeding the recommended engagement may cause installation difficulty or probe damage. If the mounting hole is shallow, select a model with a 0.8‑, 1.2‑, 1.4‑, or 1.6‑inch case length.
Unthreaded Length: This model has 0.0‑inch unthreaded length. If your mounting hole has an internal shoulder or you need the probe tip to extend a certain distance, select a model with a longer unthreaded length (e.g., code "04" = 0.4 inches).
Ambient Temperature: Standard probe is rated to +177°C. If the application exceeds this temperature, select an ETR high‑temperature probe (330191/330192 series).
Hazardous Area Requirements: If the installation area has explosive gas atmospheres, select the version with hazardous area approvals (e.g., 330101-00-20-05-02-05, if available).
Armor Protection: If the cable may be subject to mechanical damage (crushing, abrasion), select an armored version (e.g., 330102-00-20-05-02-00).
Mechanical Dimensions & Installation
Probe Tip Diameter: 8.0 mm (0.31 in)
Thread Specification: 3/8-24 UNF-2A; recommended lock nut torque: 11.2 N·m (100 in·lbf)
Overall Case Length: 2.0 in (50.8 mm)
Unthreaded Length: 0.0 in
Cable Outer Diameter: 3.68 mm (0.145 in) maximum
Connector Outer Diameter: 7.24 mm (0.285 in) maximum
Minimum Bend Radius: 25.4 mm (1.0 in)
Installation Tips: Before installation, carefully measure the effective thread depth of the mounting hole. Because the case length is 2.0 inches but the recommended thread engagement is only 0.563 inches, do not thread the entire case into the hole. Use the lock nut and washers to limit the effective engagement to ≤0.563 inches while ensuring a secure installation. Use the recommended Bently Nevada lock nut (part number 04301007) and tighten to the specified torque. Set the probe gap to the recommended -9 Vdc (approx. 1.27 mm), which can be monitored via the Proximitor Sensor output voltage.
Related Products & Compatible Configurations
This probe is typically used with the following products to form a 9‑meter system:
Companion Product | Recommended Model | Description |
Extension Cable | 330130-085-00-00 | 8.5 m standard cable, forms 9 m system |
Proximitor Sensor | 330180-90-00 | 9 m system panel‑mount Proximitor, no approvals |
Lock Nut | 04301007 | 3/8-24 lock nut with safety wire holes |
Mounting Bracket | 137492-01 | Aluminum threaded mounting bracket, 3/8-24 thread |
For other configurations, refer to the following probe options:
Model | Thread | Unthreaded Length | Case Length | Total Length | Armor | Approvals | Application |
330101-00-20-05-02-00 | 3/8-24 | 0.0" | 2.0" | 0.5 m | No | None | Current model, 9 m system short probe, extra‑long case |
330101-00-16-05-02-00 | 3/8-24 | 0.0" | 1.6" | 0.5 m | No | None | 9 m system short probe, medium‑long case |
330101-00-14-05-02-00 | 3/8-24 | 0.0" | 1.4" | 0.5 m | No | None | 9 m system short probe, extra‑long case (1.4 in) |
330101-00-12-05-02-00 | 3/8-24 | 0.0" | 1.2" | 0.5 m | No | None | 9 m system short probe, long case |
330101-00-08-05-02-00 | 3/8-24 | 0.0" | 0.8" | 0.5 m | No | None | 9 m system short probe, standard short case |
330102-00-20-05-02-00 | 3/8-24 | 0.0" | 2.0" | 0.5 m | Yes | None | 9 m system with armored mechanical protection, extra‑long case |
Matching Extension Cable: This probe must be used with an 8.5‑meter extension cable (e.g., 330130-085-00-00) to form a complete 9‑meter system.
Inquiry & Technical Support
330101-00-20-05-02-00 is an extra‑long case, short total length model in the Bently Nevada product line, designed for long‑distance monitoring applications requiring very deep mounting holes. For pricing, lead time, or technical drawings, please contact us:
Online Inquiry: Click the “Request a Quote” button and provide the model number for a prompt response.
Technical Support: If you need assistance verifying whether this configuration meets your 9‑meter system total length matching and installation dimension (especially case length) requirements, please provide the depth of your mounting hole as well as the extension cable and Proximitor Sensor models you are using, and we will help confirm compatibility.
