Configured for eddy-current probe mounting and mechanical runout measurement in Bently Nevada 3300 XL Transducer Systems, the Bently Nevada 21000-16-10-00-124-03-02 (21000 Series Proximity Probe Housing Assembly) provides direct physical interface execution for shaft vibration monitoring.
Hardware Specifications
Parameter
Specification
Model Brand
Bently Nevada
Origin
USA
Weight
2 kg
Dimensions
N/A (Housing assembly per model suffix)
Operating Temp
-35 degC to +85 degC
Power Consumption
Passive device, no power consumption
Probe Type
3300 XL 8 mm probe with connector
Probe Cable Length
1.0 m (39 in)
Probe Penetration
12.4 in
Fittings
One 3/4-14 NPT plug; one 3/4-14 to 1/2-14 NPT reducer; one cable seal grip with grommets for cable sizes 1/8 to 3/8 in
Mounting Thread
3/4-14 NPT
Material
Aluminum body with 304 stainless steel sleeve
Eddy-Current Probe Scaling and Gap Voltage Validation
The assembly supports calibrated eddy-current probe scaling per API 670 for radial vibration and thrust position measurements. Gap voltage validation targets -10 VDC for optimal linear range. Mechanical installation must ensure rotor dynamics compatibility without inducing probe-to-shaft contact during transient speed events. Cross-talk suppression is achieved through proper shield termination at the housing gland.
Frequently Asked Questions
Q: Does this housing support hot swapping of the proximity probe?
A: No. Removal or replacement requires system shutdown and re-validation of gap voltage.
Q: What is the minimum thread engagement for NPT mounting?
A: A minimum of 5 full threads is required for pressure-tight installation.
Q: Is probe penetration adjustable after installation?
A: No. Penetration length is fixed by the machined housing dimensions specified in the model suffix.
Field Installation Guidelines
Install housing with proper torque on NPT threads using PTFE tape or anaerobic thread sealant compatible with aluminum. Terminate probe cable shield directly to housing ground lug to prevent ground loops. Verify probe tip clearance before final tightening. Ensure cable seal grip grommet matches installed cable diameter to maintain ingress protection.
