Excellent PLC
Product Introduction
The Bently Nevada 21505-04-12-90-02 7200 8 mm Standard Mount Armored Probe is part of the 7200 series proximity transducers, designed for shaft vibration and position measurement in rotating machinery. Using eddy current technology, it delivers accurate, real-time monitoring of displacement and vibration.
With an 8 mm tip diameter, this probe balances compact installation with robust performance. It is widely used in turbines, compressors, pumps, and other high-speed machinery. Combined with its matching extension cables and proximitor sensors, it forms a complete non-contact measurement system. Its stainless-steel body, standard mounting design, and enhanced durability ensure stable operation even in harsh industrial environments.
Product Specifications
| Parameter | Specification |
|---|---|
| Model Number | 21505-04-12-90-02 |
| Series | 7200 8 mm Standard Mount Armored Probe |
| Probe Diameter | 8 mm |
| Measurement Principle | Eddy current (non-contact displacement sensing) |
| Linear Range | Up to 2.0 mm (80 mils) |
| Sensitivity | 200 mV/mil (7.87 mV/µm) |
| Frequency Response | DC to 10 kHz |
| Probe Tip Material | Ceramic, non-conductive |
| Housing Material | Stainless steel |
| Operating Temperature | -35°C to +180°C |
| Storage Temperature | -40°C to +200°C |
| Vibration Limit | 200 g, 10 kHz |
| Humidity Tolerance | 0–95% non-condensing |
| Mounting Type | Standard mount configuration |
| Weight | 0.22 kg |
Applications
-
Shaft vibration monitoring in turbines, compressors, and motors.
-
Axial position measurement for thrust bearing protection.
-
Gearbox monitoring to detect early faults like misalignment or wear.
-
Power generation equipment monitoring for continuous operation.
-
Petrochemical plants where reliability in harsh conditions is required.
-
Rotating machinery protection systems in critical industries.
Advantages
-
Proven Eddy Current Technology: Reliable and accurate non-contact sensing.
-
Standard Mount Design: Simplifies installation and ensures compatibility.
-
Durability: Stainless steel body and ceramic tip for harsh conditions.
-
Wide Frequency Response: Captures dynamic vibration signals effectively.
-
System Compatibility: Works with Bently Nevada extension cables and proximitor modules.
-
High Stability: Immune to EMI/RFI interference and temperature drift.
-
Global Trust: Recognized as a reliable standard in rotating machinery monitoring.
Frequently Asked Questions (FAQ)
-
What is the sensitivity of the 7200 8mm probe?
It provides 200 mV/mil (7.87 mV/µm). -
What is the linear range of this probe?
Up to 2.0 mm (80 mils) displacement. -
Which proximitor does it pair with?
It is designed to work with 7200 series proximitor sensors. -
What is the maximum vibration limit?
The probe withstands 200 g at 10 kHz. -
What type of signal output is supported?
Voltage output proportional to shaft displacement. -
What is the frequency response range?
Effective from DC to 10 kHz. -
Can it be installed in high-temperature environments?
Yes, operating range is -35°C to +180°C. -
What material is used for the probe tip?
Ceramic, ensuring non-conductive durability. -
Is it compatible with existing Bently Nevada monitoring racks?
Yes, fully integrates with standard Bently Nevada systems. -
Does it support continuous monitoring applications?
Yes, it is designed for real-time, continuous shaft monitoring.
Related Models (Same Series or Similar)
| Model Number | Description |
|---|---|
| 21505-04-12-90-01 | 7200 8mm probe, alternative configuration |
| 21505-04-12-90-03 | 7200 8mm probe with extended length |
| 21500-08-10-05-02 | 7200 5mm probe for compact spaces |
| 21500-08-12-05-05 | 7200 11mm probe for large gap measurements |
| 21507-04-12-90-02 | 7200 side-view probe |
| 21508-04-15-90-05 | 7200 high-temperature probe |
Popular Bently Nevada Models
| Model Number | Description |
|---|---|
| 3500/22M | Transient Data Interface (TDI) module |
| 3500/42M | Proximitor/Seismic Monitor module |
| 3500/32M | Relay Module for alarms and trips |
| 330103-00-07-10-02-00 | Standard 3300 XL 8mm Proximity Probe |
| 330104-00-10-10-02-05 | 3300 XL 11mm Proximity Probe |
| 330400 | Velomitor velocity transducer for seismic vibration monitoring |
