The 330101 Series is the base model of the Bently Nevada 3300 XL 8 mm eddy current proximity probe system, featuring 3/8-24 UNF threads and no armor. It is suitable for vibration, position, and Keyphasor/speed measurements in most conventional industrial environments. When used with Bently Nevada 3300 XL extension cables and Proximitor Sensors, these probes form complete 5‑meter or 9‑meter monitoring systems, widely applied to online monitoring of rotating machinery such as compressors, steam turbines, generators, and pumps.
The 330101 series offers a wide range of configuration options, allowing users to select unthreaded length, case length, total length, cable type, and hazardous area approvals according to mounting hole dimensions, system length requirements, and environmental conditions.
Features
High‑precision eddy current measurement: Linear range 2 mm (80 mils), sensitivity 7.87 V/mm (200 mV/mil), linear deviation < ±0.025 mm (1 m system).
Wide temperature range: Probe operating temperature -52°C to +177°C, suitable for harsh industrial environments.
Patented TipLoc™ molding: Provides a robust bond between probe tip and body, tensile strength 330 N (75 lbf).
Patented CableLoc™ design: Securely attaches the probe cable to the probe tip, high pull strength.
ClickLoc™ gold‑plated connectors: Finger‑tight connection, corrosion‑resistant, vibration‑tolerant, no special tools required.
Complete interchangeability: All 3300 XL 8 mm components (probes, extension cables, Proximitor Sensors) can be interchanged without recalibration; system accuracy is maintained.
Backward compatibility: 330101 probes are electrically and mechanically interchangeable with older non‑XL 3300 5 mm and 8 mm components (system performance then follows non‑XL specifications).
Multiple options: Various unthreaded lengths (0.0 ~ 8.8 in), case lengths (0.8 ~ 9.6 in), total lengths (0.5 / 1.0 / 1.5 / 2.0 / 3.0 / 5.0 / 9.0 m), cable options (standard / FluidLoc leak‑resistant), and approvals (ATEX/IECEx/CSA intrinsically safe).
Model Breakdown
The complete 330101 series part number format is:
330101 - AA - BB - CC - DD - EE
Field definitions (refer to datasheet Pages 13-14):
| Field | Code | Parameter | Description |
| Base Model | 330101 | 3300 XL 8 mm Probe, 3/8-24 UNF thread, without armor | For imperial threaded mounting holes |
| Unthreaded Length (A) | 00 ~ 88 | 0.0 ~ 8.8 inches (0.1 in increments) | Distance from probe tip to start of thread. Must be at least 0.8 in less than case length |
| Overall Case Length (B) | 08 ~ 96 | 0.8 ~ 9.6 inches (0.1 in increments) | Total threaded length. Common values: 0.8, 1.2, 1.4, 1.6, 2.0, 3.0, 4.0, 6.0 in |
| Total Length Option (C) | 05, 10, 15, 20, 30, 50, 90 | 0.5 / 1.0 / 1.5 / 2.0 / 3.0 / 5.0 / 9.0 m | Total probe cable length (including connector). 5 m probes require 5 m Proximitor; 9 m probes require 9 m Proximitor |
| Connector & Cable Option (D) | 01, 02, 11, 12 | See table below | Select connector protector, FluidLoc leak‑resistant cable |
| Agency Approval (E) | 00, 05 | 00 = Not required, 05 = CSA/ATEX/IECEx | 05 for intrinsically safe installations in hazardous areas |
Connector & Cable Option (D code) details
| Code | Connector Protector | FluidLoc | Description |
01 | Yes | No | Standard cable with connector protector |
02 | No | No | Standard cable, no protector (most common) |
11 | Yes | Yes | FluidLoc cable with connector protector |
12 | No | Yes | FluidLoc cable, no protector |
Note: FluidLoc cable prevents oil migration through the cable interior via capillary action, ideal for turbine bearing housings where oil contact is possible. Connector protectors provide environmental sealing (oil, dust, moisture) and are recommended in oily or humid environments.
Applications
Radial Vibration Monitoring: Shaft vibration measurement on fluid‑film bearing machines (compressors, steam turbines, generators, pumps).
Axial Position (Thrust) Monitoring: Measure rotor axial position and monitor thrust bearing wear.
Keyphasor / Speed Measurement: Provide speed reference signals for overspeed protection systems (refer to application notes).
Eccentricity Measurement: Monitor turbine rotor bow during slow roll.
Differential Expansion: Measure relative thermal expansion between rotor and casing.
Selection Guide
1. Determine System Length (5 m or 9 m)
5‑meter system: Probe length + extension cable length = 5 m. Common combination: 1.0 m probe + 4.0 m cable.
9‑meter system: Probe length + extension cable length = 9 m. Common combination: 0.5 m probe + 8.5 m cable.
2. Select Unthreaded Length (A)
Choose non‑zero unthreaded length when the mounting hole has an internal shoulder or the probe tip needs to extend beyond the thread.
Unthreaded length must be at least 0.8 inches less than the case length.
Code = inches × 10, e.g., 12 = 1.2 in, 00 = 0.0 in.
3. Select Overall Case Length (B)
Case length must be ≥ unthreaded length + 0.8 inches.
Common case lengths: 0.8" (standard short), 1.2", 1.4", 1.6", 2.0", 3.0", 4.0", 6.0".
Code = inches × 10, e.g., 20 = 2.0 in.
4. Select Total Length (C)
| Code | Total Length | System |
05 | 0.5 m | 9 m system (pair with 8.5 m cable) |
10 | 1.0 m | 5 m system (pair with 4.0 m cable) |
15 | 1.5 m | 5 m system (pair with 3.5 m cable) |
20 | 2.0 m | 5 m system (pair with 3.0 m cable) |
30 | 3.0 m | 9 m system (pair with 6.0 m cable, requires 9 m Proximitor) |
50 | 5.0 m | 5 m system (no extension cable, direct to Proximitor) |
90 | 9.0 m | 9 m system (no extension cable) |
Note: The 3 m total length is only available on 330101 probes and must be used with a 9 m Proximitor. 5 m total length probes must be used with a 5 m Proximitor; 9 m total length probes with a 9 m Proximitor.
5. Select Connector & Cable Option (D)
02: Standard cable, no protector (most common, dry/clean environments).
01: Standard cable + connector protector (environmental sealing needed).
12: FluidLoc cable, no protector (oil leak prevention needed).
11: FluidLoc + connector protector (leak prevention + environmental sealing).
6. Select Agency Approval (E)
00: No approvals, for non‑hazardous areas.
05: CSA, ATEX, IECEx intrinsically safe approvals for Zone 0/1/2 and Class I/II/III hazardous areas.
Example Configurations
| Model | Thread | Unthreaded Length | Case Length | Total Length | Cable Option | Approvals | Application |
| 330101-00-08-10-02-00 | 3/8-24 | 0.0" | 0.8" | 1.0m | Standard | None | Standard 5 m system, short case |
| 330101-00-12-10-02-00 | 3/8-24 | 0.0" | 1.2" | 1.0m | Standard | None | 5 m system, long case |
| 330101-00-20-10-02-00 | 3/8-24 | 0.0" | 2.0" | 1.0m | Standard | None | 5 m system, extra‑long case |
| 330101-00-08-05-02-00 | 3/8-24 | 0.0" | 0.8" | 0.5m | Standard | None | 9 m system short probe |
| 330101-00-08-10-02-05 | 3/8-24 | 0.0" | 0.8" | 1.0m | Standard | ATEX/IECEx | Hazardous area 5 m system |
| 330101-00-12-05-02-05 | 3/8-24 | 0.0" | 1.2" | 0.5m | Standard | ATEX/IECEx | Hazardous area 9 m system, long case |
| 330101-00-20-10-12-00 | 3/8-24 | 0.0" | 2.0" | 1.0m | FluidLoc | None | 5 m system requiring oil leak prevention |
Many more combinations (unthreaded length, case length, total length, cable option, approval) are available; refer to the datasheet ordering information.
Companion Products
Extension Cables: 330130 series (standard, armored, FluidLoc, etc.), lengths from 0.5 m to 8.5 m.
Proximitor Sensors: 330180 series (5 m or 9 m systems, panel/DIN mount, with/without approvals).
Lock Nuts: 04301007 (3/8-24) or 04301008 (M10×1).
Mounting Brackets: 137492 (aluminum threaded), 27474 (phenolic insulated).
Connector Protectors: 40180-02 (10 pairs), 40113-02 (kit).
Inquiry & Technical Support
For pricing, lead time, or technical drawings for 330101 series probes, please contact us:
Online Inquiry: Click the “Request a Quote” button and provide the model number or configuration parameters.
Technical Support: If you need assistance with selection, please provide mounting hole dimensions (thread, depth), required system length, and environmental conditions (temperature, hazardous area, oil mist, etc.), and we will recommend the optimal configuration.
