Bently Nevada 330103‑00‑03‑05‑02‑05 | 3300 XL 8 mm Proximity Probe
Product Overview
The Bently Nevada 330103‑00‑03‑05‑02‑05is a 3300 XL 8 mm eddy‑current proximity probe, designed for non‑contact vibration, shaft position, Keyphasor phase reference and speed monitoring on fluid‑film bearing rotating machinery. Fully compliant with API 670 standards, this proximity sensor delivers high‑precision static position and dynamic vibration measurement for critical turbomachinery assets。
Part Number Breakdown: 330103‑00‑03‑05‑02‑05
- Base model 330103: 3300 XL 8 mm proximity probe, M10×1 metric thread, unarmored
- AA‑00: 0 mm unthreaded length
- BB‑03: 30 mm overall probe case length
- CC‑05: 0.5 m total integrated cable length (no extension cable required)
- DD‑02: ClickLoc miniature coaxial connector, standard cable, without connector protector
- EE‑05: CSA, ATEX, IECEx hazardous‑area approvals
This 0.5‑meter short probe works directly with a matching 3300 XL Proximitor Sensor (model 330180 series for 1 m / 0.5 m system configuration). Probe, extension cable and Proximitor components feature full mechanical and electrical interchangeability, eliminating the requirement for individual bench calibration or component matching。
Key Specifications
| Item | Parameter |
|---|---|
| Nominal Scale Factor | 7.87 V/mm (200 mV/mil) ±5% |
| Linear Measurement Range | 0.25 mm ~ 2.3 mm (10‑90 mils) |
| Recommended Radial Vibration Gap | 1.27 mm (50 mils, approx. ‑9 Vdc output) |
| Output Impedance | 50 Ω |
| Probe Tip Material | PPS (Polyphenylene sulfide) |
| Probe Housing Material | AISI 304 Stainless Steel |
| Thread Specification | M10×1 metric thread |
| Cable Type | 75‑ohm triaxial FEP‑insulated cable, unarmored; max OD 3.68 mm |
| Connector Type | Gold‑plated ClickLoc quick‑lock coaxial connector, tool‑free finger‑tight installation |
| Minimum Cable Bend Radius | 25.4 mm (1.0 inch) |
| Probe Operating Temperature | ‑52 °C ~ +177 °C (‑62 °F ~ +350 °F) [Standard non‑ETR version] |
| Maximum Tensile Strength (Probe‑to‑cable) | 330 N (75 lbf) |
| Recommended Installation Torque | 7.5 N·m (66 in‑lbf); Max torque:22.6 N·m (200 in‑lbf) |
| Hazardous Area Certifications | CSA, ATEX, IECEx; Ex ia IIC Zone 0, Ex nA/ec Zone 2. Install per drawing 141092 / 140979 with certified safety barriers or galvanic isolators |
Mechanical & Installation Notes
- Minimum flat target diameter: 15.2 mm. Recommended minimum shaft diameter ≥76.2 mm (3 inch); minimum allowable shaft diameter 50.8 mm. Smaller shafts will alter system scale‑factor performance.
- Maintain minimum tip‑to‑tip spacing ≥38 mm‑40 mm for multiple probes to keep crosstalk below 50 mV.
- Maximum thread engagement for M10×1 thread: 15 mm. Excessive thread engagement will cause probe damage and void product warranty.
- For harsh environments, order optional connector protectors (part 03839410 / 03839420). Silicone self‑amalgamating tape is NOT recommended for connections exposed to turbine oil.
This unit is unarmored. Select armored variant 330104 series for applications with cable mechanical abrasion risks.
Related Compatible Part Numbers
Proximitor Sensors: 330180‑50‑00, 330180‑51‑00
Extension Cables: 330130‑040‑01‑00, 330130‑080‑01‑00
Monitor Rack Modules: 3500/42M, 3500/45, 3500/50
System Rack Chassis: 3500/05
Keyphasor Accessories: 3300 XL Keyphasor Probe
Recommended Accessories
- Lock nut with safety‑wire hole: 04301008 (M10×1)
- Metal threaded mounting bracket: 137492‑04
- Insulated phenolic mounting bracket: 27474‑04 (for generator / motor bearing isolation)
Matching Proximitor Sensor: 330180‑XX‑05 (‑50 for panel‑mount; ‑51 for DIN‑rail mount, 05 for hazardous‑area certification)
Frequently Asked Questions
Q: Can 330103‑00‑03‑05‑02‑05 directly replace legacy non‑XL 3300 series probes?
A: It offers backward electrical compatibility and can connect to existing Proximitor sensors and monitor modules. Please verify mounting thread dimensions and total system cable length before deployment.
Q: Can the cable of 330103‑00‑03‑05‑02‑05 be cut, shortened or extended on‑site?
A: On‑site cable modification is prohibited. System calibration is bound to the total cable length. Changing cable length will cause scale‑factor drift. Always use matched‑length factory‑supplied extension cables.
Q: Does this probe output 4‑20 mA signal directly?
A: The probe only outputs voltage proportional to gap distance. 4‑20 mA conversion requires a transmitter‑enabled Proximitor sensor or dedicated monitor module.
Q: Can 330103‑00‑03‑05‑02‑05 work against aluminum or copper target surfaces?
A: Measurement is feasible. Different conductive target materials alter calibration curves. Re‑calibration for the actual target material is mandatory; do not reuse calibration parameters for carbon‑steel targets.
Q: How to choose between the armored‑cable variant and the unarmored 330103‑00‑03‑05‑02‑05?
A: Select the armored version for bearing‑box areas exposed to mechanical compression or sharp‑debris abrasion. Choose the unarmored 330103 series for conduit routing or confined spaces without mechanical‑wear hazards.
Q: Are original Bently Nevada Proximitor sensors mandatory for the 3500 rack system?
A: Original 330180‑series Proximitor sensors are strongly recommended to guarantee linear accuracy and reliable protection interlocks. Third‑party compatible substitutes carry risks of false alarms and signal drift.
Q: What is the quick on‑site health‑check procedure for received 330103‑00‑03‑05‑02‑05 units?
A: Power up the matched Proximitor sensor with a calibrator. Move a metal target and observe output‑voltage variation. Validate against the nominal scale factor of 7.87 V/mm.
Q: Are extra parameter adjustments required when deploying 330103‑00‑03‑05‑02‑05 for Metso mill retrofit projects?
A: After hardware installation, configure the 8 mm probe measuring range and scale factor within monitoring software, and match the existing Metso protection alarm thresholds.
Application Scenarios
- Radial shaft vibration monitoring for steam turbines, compressors, centrifugal pumps
- Axial thrust position measurement for fluid‑film bearing rotating equipment
- Keyphasor phase reference and machine rotational speed detection
- Hazardous‑area turbomachinery condition‑monitoring installations
Important: This 0.5 m probe shall only pair with Proximitor sensors configured for 0.5 m /1 m system length. Do NOT use with 5‑meter or 9‑meter Proximitor modules.
