21504-04-36-05-02 Bently Nevada Probe Proximity Vibration
Description
The Bently Nevada 21504-04-36-05-02is designed to measure shaft
displacement / proximity (gap) and/or vibration of rotating
machinery in industrial applications (e.g., turbines, compressors,
motors, turbines
in oil & gas, power generation). It is part of the 7200 Transducer
System which interfaces with Bently Nevada monitors and protection
systems. A proximity probe of this type
converts the changing gap between the probe tip and the target
(rotating shaft or machine part) into an electrical signal that is
then processed by the downstream
monitoring module. For vibration monitoring, the changing gap
essentially corresponds to vibration amplitude. The probe must be
mounted in a proper
housing or mounting point, oriented correctly, with recommended gap
and alignment according to Bently’s specifications.
21504-04-36-05-02 Details
FAQ |
Q1: What mounting is required?
A: Proper mounting is critical. The probe must screw into a precision
mounting thread (typically 3/8-24 UNF for 8 mm version), be aligned
with the target, have proper clearance and secure fastening. The
unthreaded length (40 mm) must fit the bore so that when mounted
the tip sits at the correct distance from the target. The machine
housing must provide enough length (360 mm case length) so the body
of the probe doesn’t interfere with other components. The cable
must be routed properly without undue stress, bending near the
connector.
|
Q2: What shaft diameter / machine target is this probe suitable
for?
A: Because this probe is an 8 mm standard‐mount type (typical for
many 7200 series 8 mm probes), it is suitable for machines where an
8 mm probe diameter and standard mount threading (often 3/8-24 UNF)
are compatible. You must check the actual mounting hole, the
thread, bore depth and ensure the “unthreaded length / overall
length” match the machine’s mounting geometry. Also you must ensure
the probe tip clearance to target and cable routing are
appropriate.
|
Q3: What clearance (gap) between probe tip and shaft is required?
A: The specific gap depends on the system/monitor and target
geometry. For 7200 series probes a typical gap range might be ~0.25
mm to 2.0 mm for certain configurations. For example, for the model
21504-04-12-05-02 (a similar 7200-series 8 mm probe) the spec sheet
lists “Range: 0.25mm to 2.0mm”. You will want to check the official
Bently Nevada datasheet for your exact probe installation to select
the correct gap and calibrate accordingly. |
Q4: Can this probe measure vibration? Or only
proximity/displacement?
A: Yes — proximity probes are commonly used for both displacement
(gap) measurement and vibration. When mounted to measure the gap
between the probe tip and a rotating shaft, any vibration of the
shaft causes the gap to fluctuate; downstream electronics convert
that to vibration amplitude or velocity signals. So although the
probe is labeled “Proximity / Vibration” it works by displacement
measurement but is used for vibration monitoring. The 7200
Transducer System is used for such applications.
|
Inquiry now: miya@mvme.cn
Bently Nevada Hot Series:
- 3300 XL Proximity Probe
- 3300 Proximitor Sensor
- 3500 Power Supply
- 1900/65A
- 3500/42 Monitor Module
- The 990 Vibration Transmitter
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