Description

Bently Nevada 330102-00-12-10-02-05 3300 XL 8 mm Probe

The Bently Nevada 330102-00-12-10-02-05, also cataloged as the 3300 XL 8 mm Probe (Armored), serves as the primary eddy-current proximity sensor utilized to execute non-contact shaft displacement and radial vibration transduction across 3300 XL Transducer System platforms.

Suffix Breakdown & Model Matrix

Position	Code	Definition
Base	330102	3300 XL 8 mm Probe, 3/8-24 UNF thread, with armor (stainless steel armored cable jacket)
A – Unthreaded Length	00	0.0 in unthreaded length (full thread engagement available)
B – Case Length	12	1.2 in overall probe case length
C – Total Length	10	1.0 m (3.3 ft) total probe + cable length
D – Connector/Cable	02	Miniature coaxial ClickLoc connector, standard cable
E – Agency Approval	05	CSA, ATEX, IECEx Approvals

Hardware Specifications

Parameter	Specification
Brand	Bently Nevada
Origin	USA
Weight	0.12 kg
Dimensions (Shipping)	113 x 2 x 1.7 cm
Operating Temp	-51 degC to +177 degC
Power Consumption	Passive; driven by 3300 XL Proximitor Sensor (-24 VDC input)
Probe Tip Diameter	8 mm
Thread	3/8-24 UNF-2A
Armor	Stainless steel armored jacket
Linear Range	2.0 mm (0.25–2.25 mm from target), output -1 to -17 VDC
Sensitivity	7.87 V/mm (200 mV/mil) on AISI 4140 steel target
Cable / Connector	1.0 m with miniature coaxial ClickLoc connector
Agency Approvals	CSA, ATEX, IECEx

Eddy-Current Probe Scaling and Gap Voltage Validation

The 3300 XL 8 mm probe is factory-calibrated with a system sensitivity of 7.87 V/mm referenced to an AISI 4140 steel target. Gap voltage validation targets -10 VDC (corresponding to a 1.27 mm probe-to-shaft air gap) when the probe is installed and the Proximitor is powered. Cross-talk suppression between adjacent probes in multi-channel TSI racks requires a minimum center-to-center spacing of 38 mm (1.5 in) to prevent mutual inductive interference affecting rotor dynamics data.

Frequently Asked Questions

Q: Can the armored cable jacket be removed or shortened in the field?

A: No. The cable length and armor are factory-terminated; cutting alters the tuned electrical characteristics and voids calibration. Order the correct total length at procurement.

Q: Is the probe polarity-sensitive when connected to the extension cable?

A: No. The ClickLoc connector enforces correct mating orientation, but the probe itself is not polarity-sensitive. Mismatched 3300-series (5 mm vs 8 mm) components must not be intermixed as system performance will degrade.

Q: What is the recommended gap setting procedure?

A: Install the probe, then adjust axial position while monitoring DC voltage at the Proximitor test point. Set to approximately -9 to -10 VDC (1.27 mm gap) for radial vibration; verify the target is within the 0.25–2.25 mm linear range.

Field Installation Guidelines

Install the probe through the 3/8-24 UNF threaded boss with a minimum of five full thread engagements. Torque the locknut to the machine manufacturer's specification; do not overtighten the probe body. Ensure the armored cable jacket is clamped or supported near the entry point to relieve strain. Ground the shield drain wire at the Proximitor/monitor end only — never at the probe end — to prevent ground loops. Route the probe cable separately from AC power or switchgear conductors; maintain at least 150 mm separation. After installation, verify gap voltage before closing the junction box.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems