Configured for eddy-current probe mounting in Bently Nevada 3300 XL systems, the Bently Nevada 21000-16-10-15-088-03-02 (base model 21000-16) provides direct mechanical support and environmental protection for 8 mm proximity probes used in rotor vibration monitoring circuits.
Suffix Breakdown & Model Matrix
Suffix
Definition
21000-16
Aluminum body with 304 stainless steel penetration sleeve
10
Configured for 3300 XL 8 mm proximity probe
15
Supports 1.5 m probe cable length
088
Includes 8.8-inch standoff adapter
03
Fitted with 3/4-14 NPT plugs and cable seal grip
02
Mounting thread: 3/4-14 NPT
Hardware Specifications
Parameter
Specification
Model Brand
Bently Nevada
Origin
USA
Weight
Approx. 0.85 kg
Dimensions
Body OD 36 mm x Overall Length 285 mm
Operating Temp
-40 to 120 degC
Power Consumption
Passive mechanical assembly; no electrical power required
Core Function
Mechanical housing for proximity probe installation in TSI loops
Eddy-Current Probe Scaling and Gap Voltage Validation
The assembly maintains precise probe positioning to ensure correct eddy-current scaling factors for target material calibration. Mechanical rigidity preserves probe-to-target clearance within tolerance to maintain -10 VDC gap voltage targets. This supports accurate rotor displacement measurements without cross-talk interference in multi-probe arrays.
Frequently Asked Questions
Q: Can this housing be used with non-Bently Nevada probes?
A: Compatibility is limited to probes matching the mechanical interface and thread specification of the 3300 XL 8 mm series; other probes may require custom adapters.
Q: Is hot-swapping supported for probes installed in this housing?
A: No. The probe must be removed and reinstalled offline to prevent damage to the probe tip and to maintain calibrated gap settings.
Q: What torque is recommended for mounting into a threaded machine port?
A: Engage at least 5 full threads of the 3/4-14 NPT fitting and tighten to standard pipe thread torque values; apply thread sealant compatible with industrial oils and coolants.
Field Installation Guidelines
Mount the housing directly into the prepared NPT port on the machinery casing. Ensure the standoff adapter positions the probe tip at the specified target distance. Route the probe cable through the seal grip to maintain ingress protection. Ground the cable shield to the machine frame at a single point to avoid ground loops. Verify gap voltage after installation before returning the machine to service.
