Product Overview

The Bently Nevada 330101-36-80-10-02-00 Proximity Probe acts as a foundational sensor component for critical machinery protection systems. This 3300 XL 8 mm eddy current probe measures static and dynamic distances between the probe tip and the observed target, delivering precise vibration and position feedback. It operates seamlessly within Turbine Supervisory Instrumentation (TSI) setups, feeding real-time data directly to Bently Nevada 3500 monitoring racks or distributed control systems (DCS). Industrial facilities deploy this hardware on high-speed rotating machinery like steam turbines, centrifugal compressors, and large pumps to drive continuous condition monitoring and execution of emergency shutdown protocols. The rugged construction minimizes data drift, ensuring survival and signal integrity under relentless thermal and mechanical stress.

Model Configuration Breakdown

The alphanumeric part number specifies precise physical dimensions, cable variables, and agency approval parameters required for drop-in field installation.

Unthreaded Length Option (-36)

This parameter defines a 3.6-inch unthreaded length on the probe case, optimizing deep insertion depths into machine housings while maintaining structural rigidity.

Overall Case Length Option (-80)

The selection specifies an 8.0-inch total case length, providing the necessary reach to bridge the gap between external junction boxes and internal shaft surfaces.

Total Length Option (-10)

This indicator establishes a 1.0-meter overall cable length, designed to connect directly to an extension cable or proximity sensor housing without unnecessary line slack.

Connector and Cable Option (-02)

The configuration includes a miniature coaxial click-loc connector and standard cable jacket, providing low-impedance signal transmission and resistance to synthetic lubricants.

Agency Approval Option (-00)

This code represents the standard non-approvals option, intended for general industrial environments that do not require specific intrinsic safety certifications.

Hardware and Performance Specifications

Field Engineering and Installation Procedures

Target Material and Calibration Requirements

Verify that the target material matches AISI 4140 steel to maintain the calibrated scale factor of 200 mV/mil. If the shaft utilizes a different alloy, engineers must perform a manual calibration loop adjustment within the monitoring rack software to correct for target electrical conductivity variances.

Mechanical Gap Voltage Alignment

Mount the probe inside the housing and monitor the DC gap voltage output through the Proximitor sensor or 3500 rack backplane. Adjust the physical depth until the voltmeter reads -10.0 VDC, indicating the precise mid-point of the linear operational range. Tighten the locknuts to the specified torque value to freeze the mechanical position.

Coaxial Cable Management and Protection

Route the integrated coaxial cable using a minimum bend radius of 25.4 mm (1.0 inch) to protect the internal shielding from structural failure. Run all extension cables through dedicated, grounded metal conduit to isolate the weak high-frequency eddy current signals from cross-talk caused by high-voltage plant power lines.

Industrial Integration Matrix

Heavy Industrial Environment Endurance

The probe tip utilizing polyphenylene sulfide resists chemical breakdown from harsh synthetic lubes, moisture, and corrosive gases. Stainless steel case threads ensure mechanical integrity during prolonged exposure to high-amplitude structural vibrations.

Control System Interfacing

This sensor pairs with standard 3300 XL Proximitor Sensors to deliver analog voltage outputs. The resulting signals feed directly into specialized machinery monitoring modules, integrating seamlessly with plant-wide DCS architectures like Honeywell Experion PKS via Modbus or OPC UA communication gateways.

Package Ordering Content

(1) Bently Nevada 330101-36-80-10-02-00 Proximity Probe with integrated 1.0-meter coaxial cable

(2) Factory-installed locknuts for mechanical positioning and mounting retention

(3) Silicone connector protector sleeve for environmental shielding

(4) Original calibration documentation certificate

Logistics and Dispatch Guidelines

Delivery time tracks at 3-5 days when payment finish. All international shipments dispatch via premium air express carriers, including DHL, FEDEX, and UPS, ensuring expedited customs clearance. To safeguard delicate calibration parameters, the logistics team seals the hardware inside anti-static industrial packaging complete with shock-absorbing foam inserts.

Proximity Probe Diagnostics FAQs

Q1: How can an engineer verify if the probe is functioning correctly before starting the machine?

A1: Connect a digital multimeter to the Proximitor sensor terminal strip and measure the DC voltage across the signal and common wires. A reading between -2.0 VDC and -18.0 VDC indicates an active probe within its operating gap. A reading near 0 VDC points to a short circuit, while a reading approaching -24 VDC indicates an open circuit or an excessive gap distance.

Q2: Does this 1.0-meter probe require a specific extension cable configuration?

A2: Yes, the 3300 XL 8mm system demands a total system length of either 5.0 meters or 9.0 meters. Because this specific probe has a 1.0-meter integrated cable, you must pair it with a 4.0-meter or 8.0-meter extension cable that matches the specific Proximitor model in use to avoid scale factor distortion.

Q3: What causes a sudden change in gap voltage when the machine is running at stable load?

A3: Sudden shifts typically indicate mechanical movement like loose mounting brackets, target shaft migration, or serious shaft babbitt bearing degradation. If mechanical inspection shows everything is tight, inspect the coaxial connectors for oil contamination or moisture ingress, which alters the circuit impedance.