128987-130-02-05 | Bently Nevada 3300 XL 8MM Proximity Sensor

in stock#

Brand/ Manufacturer:
Bently Nevada
Dimensions:
20x20x3cm
Weight:
0.45kg
Country of Origin: :
USA
Description:
Bently Nevada 128987-130-02-05 3300 XL 8MM Proximity Sensor

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Mfr. Part Number:	128987-130-02-05

Manufacturer:	Bently Nevada

Description:	Bently Nevada 128987-130-02-05 3300 XL 8MM Proximity Sensor

Full Description:	The Bently Nevada 128987-130-02-05 3300 XL 8 mm Proximity Sensor is part of the 3300 XL 25 mm Transducer System, engineered for differential expansion (DE) measurement in mid-size to large steam turbine generators.

Status:	In stock

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Moore Automation Limited is not affiliated with or a distributor for Bently Nevada. The depiction, description, or sale of products featuring names, trademarks, brands, and logos is for identification and/or reference purposes only and does not indicate any affiliation with or authorization by any rights holder.

Product Description:

The Bently Nevada 128987-130-02-05 3300 XL 8 mm Proximity Sensor is part of the 3300 XL 25 mm Transducer System, engineered for differential expansion (DE) measurement in mid-size to large steam turbine generators. It delivers a linear range of 12.7 mm (500 mils) with an output of 0.787 V/mm (20 mV/mil), ensuring reliable monitoring of axial movement caused by rotor and stator expansion differences.

Application:

Power Generation: Installed on large steam turbines, gas turbines, and generators to track shaft stability and casing expansion.
Oil & Gas (Upstream & Downstream): Deployed on critical multistage centrifugal compressors, expanders, and high-pressure injection pumps in refineries and offshore platforms.
Chemical & Petrochemical Processing: Utilized on aggressive processing machinery, industrial mixers, and large electric motor drives.
Water & Wastewater Treatment: Monitored on high-capacity water distribution pumps and aeration blowers to keep unexpected downtime to a minimum.

Frequently Asked Questions (FAQ)

Q:What is the recommended target gap voltage?
A:For most industrial operations, the initial physical installation gap is calibrated to read a static value of -10 Vdc. This sets the probe exactly in the center of its linear range, allowing the machinery to safely flex or vibrate between its structural thresholds of -2V and -18V without clipping the sensor's signal.
Q:Can I mix and match components with this part?
A:Yes. One of the primary engineering advantages of the 3300 XL standard is complete component interchangeability. You can replace individual probes, extension cables, or Proximitor sensors of identical electrical lengths (5-meter layouts) without performing a manual bench re-calibration of the hardware.

Q:How does the sensor principle work?
A:The system utilizes the eddy current principle. A matched Proximitor sensor drives a low-power Radio Frequency (RF) signal through the extension cable directly to a tiny coil embedded inside the tip. When a metallic, conductive shaft approaches this tip, it intercepts the electromagnetic field and induces eddy currents. The system detects the resulting power loss and transforms it into an output voltage precisely proportional to the gap.

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Detailed Parameter	Part Number：128987-130-02-05
Application	Differential Expansion (DE) monitoring
Output Sensitivity	0.787 V/mm (20 mV/mil)
Linear Range	12.7 mm (500 mils)
Lifecycle Status	Active
System	TSI
Probe diameter	8 mm
Linear range	2.0 mm (80 mils)
Nominal sensitivity	7.87 V/mm (200 mV/mil)
Recommended gap	-9 Vdc (approx. 1.27 mm / 50 mils)
Frequency response	0 Hz to 10 kHz
Housing/thread material	AISI 304 stainless steel
Probe and cable operating temperature	-35°C to +177°C (up to +250°C for short periods)
Preamplifier operating temperature	-51°C to +100°C

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