The 21504-00-28-10-02 from Bently Nevada is a high-performance proximity transducer. It belongs to the 7200 Proximity Transducer Systems family. This sensor measures shaft vibration and position in rotating machinery. Specifically, it uses an 8 mm tip diameter for reliable readings. Many plants choose this model for its linear output and rugged design.
This probe comes with a 1.0 metre total length. The connector option includes a miniature male coaxial type for easy installation. Additionally, the overall case length is 2.8 inches. You will find it works perfectly with Bently Nevada proximitors and monitoring systems.
The 21504-00-28-10-02 delivers a calibrated range of 80 mils (2.0 mm). Measurement begins at approximately 10 mils (0.25 mm) from the probe face. Its scale factor is 200 mV/mil (7.87 V/mm) with ±4% accuracy when calibrated as a system. Including interchangeability errors, the tolerance stays within ±9.5%.
Linearity is another strong point. Within a 200 mV/mil straight line, the deviation stays below 0.8 mils (0.02 mm) for a system calibration. With interchangeability errors included, it remains within 2.3 mils (0.06 mm).
Frequency response covers 0 to 10 kHz (0 to 600,000 cpm). At 10 kHz, the response drops by only 5%. Therefore, it captures fast vibration events accurately.
Temperature sensitivity shows a typical -3% change in scale factor at +150°F (+65°C) with a 50 mil gap (1.27 mm). This stability ensures reliable data in varying thermal conditions.
Input power requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption. The output remains stable across the entire calibrated range.
Operating temperature for the proximitor ranges from -60°F to +212°F (-51°C to +100°C). The probe and extension cable handle -30°F to +350°F (-34°C to +177°C). Relative humidity can reach 95% non-condensing.
Corrosion resistance applies specifically to 8 mm probes like this one. Direct contact with air, water, lube oil, ammonium hydroxide, 10% sulfuric acid, MEK, or DMF will not affect probe operation.
The unthreaded length option is 0 mm. Overall case length option is 2.8 inches. Total length option is 1.0 metre (39 inches) with a tolerance of +0.25 metre, -0.10 metre (+10 inches, -4 inches).
Tip construction follows part number 21504- with 8 mm diameter. Case type is standard. Configuration threads are 3/8-24. Lead armor is not included.
Follow these steps to install the 21504-00-28-10-02 correctly. First, ensure the target surface is clean and smooth. Next, mount the probe using the 3/8-24 threads. Do not overtighten during installation.
Then, connect the miniature male coaxial connector to the extension cable. For best results, use Bently Nevada recommended cables. Maintain the recommended air gap of approximately 10 mils for zero position. Finally, secure all connections and verify power supply stability between -17.5 Vdc and -26 Vdc.
Meanwhile, avoid bending the probe cable sharply. Keep the cable away from high-temperature surfaces beyond 350°F. Additionally, use the correct proximitor model to match the 200 mV/mil scale factor.
1 x Bently Nevada 21504-00-28-10-02 probe
1 x Miniature male coaxial connector (pre-installed)
Factory packing box
Note: No certificates or warranty documents are included in the package.
We ship via FedEx, UPS, or DHL. Delivery times vary by destination.
1. What machines is the 21504-00-28-10-02 used for?
Specifically, this Bently Nevada 21504-00-28-10-02 monitors vibration in turbines, compressors, pumps, and fans. It measures shaft displacement relative to the bearing housing.
2. Can I extend the cable length of this probe?
Yes, you can. The total length option is 1.0 metre, but you may add an extension cable. However, ensure the total system length stays within Bently Nevada specifications for accurate calibration.
3. Does this probe work with other brand proximitors?
For best performance, use it with Bently Nevada proximitors. Other brands may have different scale factors or power requirements. Consequently, measurement errors could occur.
4. How do I clean the probe tip before installation?
Use a soft, lint-free cloth with isopropyl alcohol. Avoid scratching the 8 mm tip surface. Additionally, never use abrasive materials or strong solvents like MEK for routine cleaning.
5. What is the warranty period for this product?
The manufacturer provides a 12-month factory warranty. This covers defects in material and workmanship. Nevertheless, the packaging list above does not include warranty documents. Contact us for warranty claims.
| Brand Name | Bently Nevada |
| Model No. | 21504-00-28-10-02 |
| Product Type | Proximity Probe |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
