Configured for non-contacting shaft displacement and vibration measurements in 3500 Machinery Protection Systems, the Bently Nevada 330908-00-36-05-02-05-05 (330908 Proximity Probe) provides direct physical/electrical execution. It transforms proximity changes between the probe tip and target material into proportional analog voltage signals when paired with small-target or confined-space machinery installations.

Suffix Breakdown & Model Matrix

• 330908: 3300 NSv Proximity Probe with 3/8-24 UNF thread, without armor.

• 00: Unthreaded Length option (0.0 in).

• 36: Overall Case Length option (3.6 in).

• 05: Total Length option (0.5 meter, 1.6 feet).

• 02: Connector option (Miniature coaxial ClickLoc connector, standard cable).

• 05: Agency Approval option (Multiple multi-national hazardous area certifications including ATEX/IECEx intrinsic safety).

• 05: Compensation Option variant (Calibrated for specific physical target profiles or standard metallurgical scales).

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The 3300 NSv series utilizes a compact 5.0 mm tip diameter optimized for tight physical layouts where standard 8 mm probes cannot clear surrounding structural constraints. Accurate measurement behavior requires precise eddy-current probe scaling tuned directly to the mechanical curvature and composition of the target surface. During deployment loops, engineers perform field gap voltage validation to zero the sensor.

Adjusting the physical position until the system output displays exactly -10 VDC targets the linear midpoints of the sensor range, stabilizing tracking metrics against sudden rotor dynamics shifts. Because of the tight spacing inherent in small-bore machinery installations, strict mounting tolerances are required to ensure cross-talk suppression and eliminate inductive overlapping from adjacent components.

Frequently Asked Questions

Q: Can this 3300 NSv probe be matched with a standard 3300 XL 8 mm Proximitor Sensor?

A: No. The 330908 probe has a distinct electrical impedance and requires different eddy-current probe scaling than the standard 8 mm line. It must be paired exclusively with a matching 3300 NSv Proximitor Sensor to avoid severe measurement errors.

Q: Is this proximity probe designed to support online hot-swap connection switches at the coaxial joint?

A: Uncoupling the ClickLoc coaxial connector during system operation breaks the high-frequency RF loop, causing the associated 3500 monitor channel to flag a Transducer Fault (NOT OK) state. To prevent false relay execution, the tracking channel must be placed in a bypassed state before manual disconnect.

Q: How does a target diameter smaller than the 5.0 mm probe tip affect the scale factor?

A: Operating with a target smaller than the recommended minimum diameter deforms the RF flux path, altering the factory eddy-current probe scaling and rendering the standard 7.87 V/mm calibration invalid. Custom software coefficients must be applied if target sizing limits are violated.

Field Installation Guidelines

• Mechanical Torque Controls: When threading the 3/8-24 UNF probe case into the machine bracket, do not exceed the absolute structural torque limit of 13.5 N-m (120 in-lb). Exceeding this value can shear the internal potting compound or warp the stainless steel casing.

• Side Clearance Boundaries: To ensure complete cross-talk suppression and eliminate parasitic side-viewing interference from neighboring metal walls, ensure a minimum flat counterbore diameter of 19.0 mm (0.75 in) is cleared around the probe tip.

• Coaxial Connector Handling: Ensure the ClickLoc miniature coaxial connector interfaces are free of oil and debris before execution. Secure the junction completely by hand until a physical tactile click is felt; do not employ mechanical pliers or wrenching tools.

• Cable Strain and Routing: Maintain a minimum static bend radius of 25.4 mm (1.0 in) for the coaxial cable link. Route the line through grounded weather-proof conduit pathways to isolate the low-voltage analog signal from ambient electromagnetic interference.

• Shield Grounding Matrix: Keep the coaxial shield insulated from the machinery structural casing along the full run. Single-point grounding must be maintained, terminating exclusively at the designated ground terminal of the Proximitor Sensor housing.

Procurement Manifest

The procurement package contains the following components:

1. (1) 330908-00-36-05-02-05-05 Proximity Probe assembly.

2. (2) Mechanical hex locknuts for 3/8-24 UNF installation.

3. (1) Set of clear silicone protective connector insulation boots.

4. (1) Certificate of factory calibration validation parameters.

Logistical Packaging & Delivery Profile

• Dispatch Timeline: 2-7 days when payment finish through verified commercial banking clearings.

• Transit Management: Forwarded globally via high-priority priority express networks including DHL, FEDEX, or UPS.

• Packaging Standard: Shipped inside rigid, specialized anti-static industrial packaging enclosures to prevent mechanical degradation or electrostatic charge buildup prior to field integration.