PR9268/300-000 | Emerson EPRO Electrodynamic Velocity Sensor

PR9268/300-000 is a passive, self-powered electrodynamic seismic velocity transducer from Emerson EPRO, designed for horizontal absolute casing vibration measurement on bearing pedestals, turbine casings, pump and fan housings for Turbine Supervisory Instrumentation (TSI) and machinery protection systems. This horizontal mount variant uses open terminal termination; suffix -000 indicates no factory pre-installed armored cable, allowing site engineers to select custom cable types and lengths to match plant layout requirements.

It operates based on seismic electromagnetic induction principle and outputs AC voltage proportional to casing vibration velocity without external excitation power. Widely deployed in power, oil & gas and petrochemical industries, it is commonly paired with PR6426 eddy current probes to complete full shaft relative vibration and casing absolute vibration monitoring for turbo machinery.

Key Features

• Self-powered passive electrodynamic velocity pickup, no external power supply required
• Horizontal mounting configuration for X-axis absolute casing vibration measurement, mounting tolerance ±10°
• Open terminal connection, no factory pre-fitted armored cable (-000), flexible on-site wiring
• Sensitivity: 17.5 mV/mm/s (±5% @80Hz, 20°C, 100kΩ load)
• Frequency response: 14 Hz ~ 1000 Hz, natural frequency 14Hz ±7%
• Max continuous acceleration 10g; intermittent peak acceleration up to 20g
• Low transverse sensitivity <0.1 at 80Hz, suppress cross-axis measurement interference
• Robust aluminium alloy housing, IP55 protection grade, dust and splash resistant
• Sensor operating temperature: -20℃ ~ +100℃
• M8×1 mounting stud for direct bolt-on installation on bearing housings
• Amplitude linearity <2%, low long-term drift and excellent repeatability for safety trip interlock
• Compatible with EPRO MMS6000, MMS6100 monitoring racks and Emerson AMS 6500 system
• API 670 compliant for critical rotating machinery protection

Technical Specifications

Model: PR9268/300-000 Brand: EPRO (Emerson) Sensor Type: Electrodynamic seismic velocity transducer (passive self-powered) Mount Orientation: Horizontal X-axis casing vibration, allowable angle deviation ±10° Cable Version: -000 = open terminal, no factory pre-assembled cable Measurement Principle: Electromagnetic induction, self-generating AC voltage Sensitivity: 17.5 mV/mm/s ±5% Frequency Response: 14 Hz ~ 1000 Hz Natural Frequency: 14 Hz ±7% @ 20°C Max Vibration Amplitude: 500 μm peak-to-peak Amplitude Linearity: <2% Continuous Acceleration: 10g peak Intermittent Acceleration: 20g peak Transverse Acceleration Limit: 2g Transverse Sensitivity: <0.1 @80Hz Sensor Operating Temperature: -20℃ ~ +100℃ Housing Material: Aluminium alloy Mount Thread: M8×1 mm Protection Grade: IP55 Internal Resistance: 1723Ω ±2% Inductance: ≤90 mH Output Signal: AC voltage proportional to casing vibration velocity Recommended Load: ≥100 kΩ input impedance for monitoring unit Measured Parameter: Absolute bearing housing vibration velocity (mm/s)

Applications

• Power generation: Steam turbine, gas turbine, generator bearing housing horizontal absolute vibration monitoring
• Oil & gas: Centrifugal compressors, expanders and large process pump casing vibration protection
• Petrochemical: Critical rotating equipment condition monitoring, vibration alarm and safety trip protection
• Heavy industry: Large fans, blowers casing vibration measurement
• TSI machinery protection system: Combined with PR6426 eddy current probes to realize complete rotor and casing monitoring

Why Choose PR9268/300-000

EPRO PR9268 /30X series velocity transducers are industry-standard horizontal casing vibration sensors for turbo machinery TSI systems. PR9268/300-000 horizontal open terminal type without factory pre-made cable provides maximum flexibility for field wiring. Engineers can deploy custom armored cables, high-temperature cables or different cable lengths to match site routing requirements.

As a passive self-powered transducer, it eliminates measurement failure risks caused by sensor power loss. The sturdy alloy housing performs reliably in oily, dusty industrial environments. We supply original new PR9268/300-000 velocity sensors with inspection report and factory calibration certificate, global air & sea shipping available. We also accept inquiries for other PR9268 variants with different orientation and cable suffix codes. Contact us for datasheet, dimension drawing and formal quotation.

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FAQ

Q: What does PR9268/300-000 measure?

A: It measures absolute horizontal casing vibration velocity of bearing housings and machine casings for turbo machinery TSI protection.

Q: What do /300 and -000 mean?

A: /300 = horizontal mounting configuration with open terminal; -000 = without factory pre-installed armored cable, field cable assembly required.

Q: Does PR9268/300-000 require external power supply?

A: No, it is passive self-powered electrodynamic velocity sensor; mechanical vibration generates the AC output signal.

Q: What systems can PR9268/300-000 connect to?

A: Compatible with EPRO MMS6000, MMS6100 series monitors and Emerson AMS 6500 machinery health systems.

Q: What is the difference between PR9268/200-000 and PR9268/300-000?

A: PR9268/200-000: vertical mounting, open terminal. PR9268/300-000: horizontal mounting, open terminal. The core difference is the installation orientation.

PR6426/000-010+CON021

Our products are widely used in CNC mechanical metallurgy, petroleum and natural gas, and petrochemical industries,Chemical industry, paper and printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing,Plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution.The quoted price is not the actual price. Please contact the shopkeeper before placing the order to confirm the price and delivery time!!!

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