BA21504-00-08-10-02 Bently Nevada Proximity Probe
Description
The BA21504-00-08-10-02 probe is part of the Bently Nevada 7200/3300 XL “8 mm” proximity transducer system. It is used to sense the distance (gap) between a conductive target (usually a rotating shaft or
component) and the probe tip, converting changes in that gap into a signal (via eddy‐current principle) which is then processed by a proximitor/amplifier.It is a standard‐mount, 8 mm diameter probe,
with a 3/8‑24 UNF thread (for standard mount) and integral lead cable (or connector) depending on the ordering code. The “21504” series indicates an 8 mm standard
mount version (no cable armour) in the 7200/3300XL family.
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FAQ
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Q1: What kind of gap/measurement range does this probe support?
A: The listing gives a calibrated range of ~80 mils (2.0 mm) with starting point ~10 mils (0.25 mm) from the tip face. In practice, the eddy‑current probe will have its most linear range when the tip‐to‐target gap is within the recommended range. For the 8 mm Bently series, typical recommended gap
is in the few tens of microns to a couple of mm, depending on the target geometry and electronics. Always consult the
specific data sheet for your system.
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Q2: What target material and shape should be used with this probe?
A: The system is based on eddy‐current sensing: a conductive (typically steel) target whose distance to the probe tip changes. While I
don’t have the full Bently datasheet for this exact variant, similar probes require a flat or cylindrical conductive surface of
sufficient size (to fill the probe’s magnetic field) and a consistent finish (no heavy rust, pits, or debris). The more the
target matches the conditions under which the probe was calibrated, the better the accuracy and linearity. If you
deviate (smaller target, different alloy, non‑flat surface), expect possible measurement errors.
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Q3: What is the supply voltage / electrical spec for this probe?
A: While I did not find a full published spec for exactly “21504‑00‑08‑10‑02”, similar listings suggest: “Input power:
‑17.5 Vdc to ‑26 Vdc at 12 mA Max consumption.” For example one listing says: “Lead Armor: No … Input
power: ‑17.5 Vdc to ‑26 Vdc at 12 mA Max consumption.” You’ll need to check the matched
proximitor sensor’s specification in your system to
onfirm compatibility.
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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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