PR9268/705-000 Emerson Velocity Sensor | New & Original Stock
Manufacturer: Epro
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Part Number: PR9268/705-000
Condition：New with Original Package
Product Type: Proximity Sensors
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Country of Origin: Germany
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Emerson PR9268/705-000 Electrodynamic Velocity Sensor
The Emerson PR9268/705-000, also cataloged as the PR9268 Electrodynamic Velocity Sensor, serves as the primary PR9268 Electrodynamic Velocity Sensor utilized to execute absolute casing vibration monitoring across VM600 and AMS 6500 platforms.
Hardware Specifications
| Parameter | Specification |
| Model | PR9268/705-000 |
| Brand | Emerson / EPRO |
| Origin | Germany |
| Weight | 0.60 kg typical |
| Dimensions | Cylindrical design with standard industrial housing dimensions |
| Operating Temp | -20 to +100 deg C |
| Power Consumption | Passive transducer (no external power consumption required) |
| Measurement Principle | Electrodynamic moving coil within permanent magnetic field |
| Mounting Orientation | Horizontal (+/- 30 deg) |
| Nominal Sensitivity | 28.5 mV/mm/s (+/- 5%) at 80 Hz, 20 deg C, 100 kOhm load |
| Frequency Range | 4 Hz to 1 000 Hz (+/- 3 dB) |
| Natural Frequency | 14 Hz (+/- 7%) at 20 deg C |
| Core Measurement Range | +/- 1 500 um displacement |
| Maximum Acceleration | 10 g continuous, 20 g intermittent |
| Max Transverse Acceleration | 2 g |
| Protection Class | IP67 |
| Housing Material | Stainless steel |
| Compliance | API 670 |
4-20 mA HART Loop Protocol and Channel-to-Channel Isolation
The electrodynamic transducer operates on a passive self-generating moving-coil framework, generating an analog voltage proportional to vibration velocity before routing to specialized machinery monitors or transmitters that interface with the 4-20 mA HART loop protocol. Within the monitoring rack architecture, high channel-to-channel isolation prevents electrical cross-talk and common-mode noise propagation between multiple horizontal sensor locations. Dynamic signal tracking pathways maintain an accurate velocity baseline against high transverse acceleration forces, ensuring clean signal conversion for distributed control networks and transient diagnostic software utilities.
Frequently Asked Questions
Q: What are the backplane current limits and hot-swap restrictions for the monitoring loops associated with this passive sensor?
A: The PR9268/705-000 is a completely passive inductive transducer that requires zero external excitation power from the interface module. Hot-swapping the field wiring terminals at the rack interface panel is permitted at any time during live operation without threatening backplane electronics or causing voltage bus instability.
Q: How does the specific horizontal mounting limitation impact sensor performance if tilted past the technical specification?
A: The physical spring-mass design of the internal moving coil is optimized for a horizontal plane within a +/- 30 deg tolerance window. Exceeding this boundary induces gravitational offset errors, causes internal component friction, and modifies the 14 Hz natural frequency baseline, which invalidates the nominal 28.5 mV/mm/s sensitivity calibration.
Field Installation Guidelines
- Mount the sensor assembly rigidly onto a machined surface of the bearing pedestal or machine casing, ensuring the alignment plane matches horizontal axis requirements within +/- 30 deg.
- Torque the mounting fasteners to standard industrial criteria to prevent high-frequency transmission loss or structural rattling at the mounting interface.
- Route the sensor signal cable through flexible liquid-tight conduit paths to sustain the IP67 protection class and shield the internal circuit from moisture or dust ingress.
- Interconnect the overall cable shield to the instrumentation terminal panel ground bus at a single end only to eliminate ground loop current interference.
- Verify that the continuous operating temperature along the machinery casing profile does not exceed the maximum -20 to +100 deg C technical limits.