The Bently Nevada 21505-68-96-05-02 belongs to the trusted 7200 proximity transducer system. This 8 mm probe measures radial vibration and axial position in turbomachinery. It uses a 3/8-24 thread configuration with a standard case.
Additionally, this model comes with stainless steel lead armor. This armor protects the cable from mechanical damage in harsh environments. The probe includes a miniature male coaxial connector for easy system integration.
The Bently Nevada 21505-68-96-05-02 offers a calibrated range of 80 mils (2.0 mm). This range begins at approximately 10 mils (0.25 mm) from the probe face. The scale factor reaches 200 mV/mil (7.87 V/mm) with a ±4% tolerance when calibrated as a complete system.
For interchangeability, the scale factor stays within ±9.5% including errors. Linearity measures within 0.8 mils (0.02 mm) of a 200 mV/mil straight line for system calibration. With interchangeability, linearity stays within 2.3 mils (0.06 mm).
Moreover, the frequency response ranges from 0 to 10 kHz (0 to 600,000 cpm). At 10 kHz, the signal rolls off by -5%. Temperature sensitivity shows a typical -3% change in scale factor at +150°F (+65°C) with a 50 mils gap (1.27 mm).
The Bently Nevada 21505-68-96-05-02 requires an input power of -17.5 Vdc to -26 Vdc. Maximum current consumption is 12 mA. This low power design makes it compatible with most proximity monitoring systems.
The probe tip diameter is 8 mm. Thread type is 3/8-24 UNF. The unthreaded length option 68 equals 6.8 inches. Overall case length option 96 equals 9.6 inches. Total length option 05 equals 0.5 metre (20 inches).
Lead armor is present and made of stainless steel. The connector option 02 includes a miniature male coaxial connector. System weight totals 1.3 lbs (0.59 kg).
Operating temperature for the Proximitor ranges from -60°F to +212°F (-51°C to +100°C). For the probe and extension cable, the range is -30°F to +350°F (-34°C to +177°C).
Relative humidity tolerance reaches 95%, non-condensing. Furthermore, the 8 mm probe resists direct contact with many substances. These include air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, and DMF. Probe operation remains unaffected by these chemicals.
First, clean the target surface thoroughly before mounting. Next, set the probe gap to the recommended value for your application. For most radial vibration measurements, a 50 mils (1.27 mm) gap works well.
Additionally, handle the stainless steel armor with care. While it provides excellent protection, excessive bending may damage the internal cable. Use the miniature male coaxial connector for secure attachment to extension cables or the Proximitor.
1 x Bently Nevada 21505-68-96-05-02 probe assembly (0.5 metre cable, armored, with coaxial connector)
1 x Installation instruction sheet
1 x Protective plastic tube
We ship via FedEx, UPS, DHL to ensure safe and fast delivery worldwide.
1. What is the difference between the 7200 series and the 3300 XL series?
The Bently Nevada 21505-68-96-05-02 belongs to the 7200 series, which uses a different housing design. The 3300 XL series offers improved TipLoc and CableLoc features. Both provide reliable vibration monitoring, but the 3300 XL has higher pull strength.
2. Can I use this probe without the lead armor?
No. This specific model 21505-68-96-05-02 comes with stainless steel lead armor as a fixed option. If you need a probe without armor, please select a different ordering code.
3. What is the maximum cable length for this proximity system?
The total system length depends on your Proximitor model. Generally, you can add extension cables up to 9 metres total. However, always check the specific Proximitor manual for exact limits.
4. Is the Bently Nevada 21505-68-96-05-02 suitable for subsea applications?
No. This probe is not designed for subsea use. The operating environment limits include humidity to 95% non-condensing. Direct water contact is allowed for cleaning, but continuous submersion will damage the probe.
5. How do I verify the probe is working correctly?
You can test the Bently Nevada 21505-68-96-05-02 using a calibration fixture. Apply power at -24 Vdc and measure the output voltage while moving a target. The scale factor should read 200 mV/mil ±4% when calibrated as a system.
| Brand Name | Bently Nevada |
| Model No. | 21505-68-96-05-02 |
| Product Type | Proximity Vibration Probe |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
