PR9268/206-100 | Emerson EPRO Electrodynamic Velocity Sensor

PR9268/206-100 is a passive, self-powered electrodynamic seismic velocity transducer manufactured by Emerson EPRO, designed for measuring absolute casing vibration velocity on bearing pedestals, turbine casings, pump and fan housings for Turbine Supervisory Instrumentation (TSI) and machinery protection systems. This horizontal mount variant comes with factory pre-assembled connector and 10-meter stainless steel armored cable for ready field installation.

Working on seismic electromagnetic induction principle, PR9268/206-100 outputs AC voltage proportional to casing vibration velocity and requires no external excitation power supply. Widely used in power, oil & gas and petrochemical industries, it is commonly paired with PR6426 eddy current probes to achieve complete monitoring of shaft relative vibration and casing absolute vibration 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
• Factory pre-installed 10m stainless steel armored shielded cable
• 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
• Rugged stainless steel housing, IP55 protection grade, dust and splash resistant
• Sensor operating temperature: -20℃ ~ +100℃; armored cable -40℃ ~ +180℃
• 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: PR9268/206-100 Brand: EPRO (Emerson) Sensor Type: Electrodynamic seismic velocity transducer (passive self-powered) Mount Orientation: Horizontal X-axis casing vibration Cable Version: -100 = factory integrated 10m armored 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℃ Cable Operating Temperature: -40℃ ~ +180℃ Housing Material: Stainless steel 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 PR9268/206-100

EPRO PR9268 series velocity transducers are industry-standard casing vibration sensors for turbo machinery TSI systems. PR9268/206-100 horizontal version with factory pre-fitted 10m armored cable saves field cable assembly work and reduces wiring errors on site.

As a passive self-powered transducer, it eliminates measurement failure risks caused by sensor power loss. The sturdy stainless steel housing and armored cable resist abrasion, oil and dust in harsh plant environments. We supply original new PR9268/206-100 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 PR9268/206-100 measure?

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

Q: What do /206 and -100 mean?

A: /206 = horizontal mounting configuration; -100 = factory pre-installed 10 meters armored cable.

Q: Does PR9268/206-100 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 PR9268/206-100 connect to?

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

Q: What is the difference between PR9268/202-100 and PR9268/206-100?

A: PR9268/202-100: vertical installation, MIL connector,10m cable. PR9268/206-100: horizontal installation, 10m integrated armored cable. The core difference is mounting 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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