Bently Nevada 21505-00-44-10-02 Proximity Probe
Bently Nevada 21505-00-44-10-02
7200 Series
21505-00-44-10-02 pdf
Brand Name:
Bently Nevada
Bently Nevada 21505-00-44-10-02
,7200 Series
,21505-00-44-10-02 pdf
21505-00-44-10-02 Proximity Probe
An 8 mm probe configuration within the Bently Nevada 7200 proximity transducer family, intended for non-contact displacement measurement as part of a compatible probe, extension-cable and Proximitor arrangement.
Technical Specifications
The 7200 family uses an eddy-current measurement principle. The figures in the performance column describe the family-level system, not a guarantee of standalone probe performance outside a correctly matched assembly.
| Part number | 21505-00-44-10-02 |
|---|---|
| Manufacturer | Bently Nevada |
| Product type | Proximity probe |
| Product series | 7200 Series, 5 mm / 8 mm proximity transducer system |
| Probe family diameter | 8 mm |
| Measurement principle | Eddy-current, non-contact displacement measurement |
Additional 7200 system specifications
| Linear measurement range | 2.03 mm (80 mil), system calibration range |
|---|---|
| Average scale factor | Typical: 7.87 ± 0.21 V/mm (200 ± 5.4 mV/mil) at 22°C |
| Average scale factor, worst case | 7.87 ± 0.39 V/mm (200 ± 10 mV/mil) |
| Gap at −3.0 V | 0.508 ± 0.254 mm (20 ± 10 mil) |
| Proximitor supply range | −17.5 to −26 VDC; barrier arrangements have separate supply requirements |
| Current draw | 12 mA maximum with a 10 kΩ load |
| Output resistance | 50 Ω |
| Output load used for calibration | 10 kΩ resistive load |
| System calibration target | AISI E4140 steel |
| System test conditions | 22°C, −24.0 ± 0.1 VDC supply and 10 kΩ load |
Probe construction and mechanical limits
| Probe case material | 300-series stainless steel |
|---|---|
| Lead and core jacket | PTFE (Teflon) |
| Probe connector materials | Stainless steel and silver-plated brass with PTFE dielectric insert |
| Probe coil resistance, nominal | 3.3 Ω |
| Case-to-circuit isolation | Designed to withstand at least 500 VAC at 60 Hz with less than 1 mA current flow |
| Minimum recommended cable bend radius | 25.4 mm (1.0 in) for armored and unarmored cables |
| Probe case torque | Depends on case thread and mounting style; use the applicable probe specification |
Mechanical data above describes the 7200 probe family. Do not apply a generic torque value without identifying the exact mounting and thread configuration.
How the Measurement System Works
The probe is one part of a measurement chain. The probe, extension cable and Proximitor must be selected and installed as a compatible system.
Typical measurement applications include shaft position and vibration monitoring on rotating or reciprocating machinery, such as turbines, compressors, pumps, motors and generators.
Fault Diagnosis & Maintenance
When a monitoring channel reports an abnormal signal, investigate the complete transducer path instead of replacing the probe based on the symptom alone.
| Observed condition | Possible cause | Diagnostic direction |
|---|---|---|
| Monitor OK indication absent | Power supply, field wiring, transducer circuit or incorrect probe gap | Check the system supply, field connections and probe-to-target position before isolating individual components. |
| Transducer supply outside expected range | Faulty supply, field wiring or Proximitor | Compare the source voltage with the voltage measured at the transducer, then isolate the supply and wiring path. |
| Signal output at 0 VDC | Incorrect supply, shorted field wiring or a faulty Proximitor | Check supply conditions and shorts in the field wiring or terminal connections. |
| Signal between −1 VDC and 0 VDC | Probe too close to target, incorrect target surface, connector fault or an open/short circuit | Check probe gap and target geometry; inspect connections and test the probe and extension cable as separate components. |
| Unexpected change in trend | Possible transducer fault or a genuine change in machinery condition | Compare the signal with historical trends and machine operating conditions before concluding that the probe has failed. |
Maintenance test equipment and measurement references
| Test equipment | Digital multimeter, spindle micrometer, 10 kΩ fixed resistor and a −24 VDC ± 1 V supply for the described scale-factor verification setup |
|---|---|
| VPS | Power-source voltage measured between the power source and common |
| VXDCR | Voltage at the transducer measured between −VT and COM |
| VSIG | Signal voltage measured between OUT and COM |
| System cable resistance reference | The manual gives nominal total resistance checks for 5 m and 9 m system arrangements; use the relevant system configuration and full troubleshooting procedure when testing. |
These checks require qualified personnel and suitable test arrangements. Isolate hazards and follow the site's machinery-protection and electrical safety procedures before troubleshooting.
Application & Downtime Considerations
Delivery, Warranty & RFQ
For a quotation, provide the following details:
Clear part-number communication, sourcing coordination and quotation support for industrial automation and machinery-monitoring components.
Frequently Asked Questions
1. What is the 21505-00-44-10-02?
It is identified as a Bently Nevada 7200-series proximity probe in the 8 mm product family.
2. What does the 7200 system measure?
The system measures the gap between the probe tip and a conductive target, supporting non-contact displacement and vibration measurement.
3. Can this probe be mixed with another proximity system series?
Do not assume cross-series compatibility. Match the probe, extension cable, Proximitor and monitoring arrangement to the applicable system specification.
4. What should be checked when the monitoring output becomes abnormal?
Check supply voltage, field wiring, connector integrity, probe gap and target conditions before identifying a failed component.
5. How do I request the 21505-00-44-10-02 PDF/manual and a quotation?
Email sales@amikon.cn with the full part number, quantity, destination, required date and machine/system model to request sourcing and documentation assistance.
21505-00-44-10-02 PDF / Manual
For engineering evaluation and maintenance, refer to the Bently Nevada 7200 Series 5 mm / 8 mm Proximitor Sensor Supplement Manual, Part Number 164931-01, together with the applicable 7200 proximity probe and system documentation.
The supplement covers system installation, field wiring, scale-factor verification, troubleshooting, probe construction and system performance. Use the exact product configuration and applicable revision when making replacement or maintenance decisions.
Related Models
The following are additional part numbers from the supplied catalogue pool. They are included for catalogue navigation only and are not presented as compatible replacements for this proximity probe.
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