The Bently Nevada 21505-00-32-90-02 is a high-performance proximity probe for vibration monitoring. This 8 mm probe belongs to the 7200 series. It measures shaft vibration, position, and RPM in critical machinery. Many engineers trust this model for its reliable output and robust construction.
Additionally, this probe comes with a 9 metre total length. The overall case length measures 320 mm. A miniature male coaxial connector (option 02) ensures easy integration. The tip diameter is 8 mm, and it features 3/8-24 threads. Stainless steel lead armor protects the cable in harsh environments.
Power Requirements
The system requires a DC power supply between -17.5 Vdc and -26 Vdc. Maximum current consumption is 12 mA.
Output Characteristics
Calibrated range reaches 80 mils (2.0 mm). Measurement begins at approximately 10 mils (0.25 mm) from the probe face. Scale factor is 200 mV/mil (7.87 V/mm) with ±4% accuracy when calibrated as a system. Including interchangeability errors, accuracy stays within ±9.5%.
Linearity stays within 0.8 mils (0.02 mm) of a 200 mV/mil straight line for system calibration. With interchangeability, linearity is within 2.3 mils (0.06 mm). Frequency response goes from 0 to 10 kHz (0 to 600,000 cpm). At 10 kHz, response drops by only -5%.
Temperature Sensitivity
Typically, scale factor changes by -3% at +150°F (+65°C) with a 50 mil gap (1.27 mm).
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 can reach 95%, non-condensing.
Corrosion Resistance
For 8 mm probes only, direct contact with the following substances does not affect operation:
Air and water
Lube oil
Ammonium hydroxide
Sulfuric acid (10%)
MEK (methyl-ethyl ketone)
DMF (Dimethylformamide)
The probe tip diameter is 8 mm. Case threads follow the 3/8-24 standard. Unthreaded length option 00 means 0 mm. Overall case length option 32 equals 320 mm. Total length option 90 gives 9 metres (351 inches). Tolerance for total length is +1.0 metre / -0.9 metre (+39 inches / -35 inches).
Lead armor is present and made of stainless steel. The connector option 02 is a miniature male coaxial type. System weight is 1.3 lbs (0.59 kg).
First, ensure the target surface is clean and conductive. Next, mount the probe using the 3/8-24 threads. Do not overtighten the probe body. Furthermore, maintain the recommended gap of approximately 10 mils (0.25 mm) from the probe face to the target.
Use the correct extension cable for the 21505-00-32-90-02 system. The 9 metre total length includes the probe and cable. Avoid bending the cable sharply near the connector. Finally, verify power supply voltage before connecting the Proximitor.
1 x Bently Nevada 7200 series proximity probe (21505-00-32-90-02)
1 x Stainless steel lead armor (integrated)
1 x Miniature male coaxial connector (pre-installed)
1 x Factory packing box with foam protection
All orders ship via FedEx, UPS, or DHL. Delivery typically takes 3 to 7 business days.
1. What machines is the 21505-00-32-90-02 used for?
This probe monitors vibration and position in turbines, compressors, pumps, and fans. It works well in steam and gas turbine applications.
2. Can I use this probe with a different extension cable?
Yes, but use only Bently Nevada approved cables. The total system length must match the calibrated length of 21505-00-32-90-02 for accurate readings.
3. What happens if the probe tip touches the target?
Physical contact may damage the probe tip or the shaft surface. Always maintain the recommended 10 mil (0.25 mm) minimum gap during operation.
4. Is this probe resistant to oil and chemicals?
Yes. The 8 mm tip resists water, lube oil, 10% sulfuric acid, MEK, and DMF. It also handles ammonium hydroxide without performance loss.
5. How do I clean the probe tip before installation?
Use a soft lint-free cloth with isopropyl alcohol. Do not use abrasive materials or strong solvents like acetone.
| Brand Name | Bently Nevada |
| Model No. | 21505-00-32-90-02 |
| Product Type | Proximity Probe |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
