Product Name:Electrodynamic Velocity Sensor
Brand Name: Emerson Epro
Model Number: PR9268/301-000
Country of Origin: USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
Emerson Epro |
Model Number: |
PR9268/301-000 |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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Send an email: |
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Contact in Whatsapp: |
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Parameter |
Specification |
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Model |
PR9268/301-000 |
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Manufacturer |
Emerson / EPRO |
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Sensor Type |
Electrodynamic velocity sensor (passive, self-powered) |
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Orientation |
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Sensitivity |
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Frequency Range |
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Natural Frequency |
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Vibration Amplitude (Mechanical Limit) |
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Amplitude Linearity |
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Maximum Acceleration (Continuous) |
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Maximum Acceleration (Intermittent) |
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Transverse Sensitivity |
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Damping Factor |
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Resistance |
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Inductance |
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Active Capacity |
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Operating Temperature |
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Protection Class |
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Relative Humidity |
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Housing Material |
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Dimensions |
22x22x8cm |
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Weight |
0.74kg |
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Cable |
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Connector |
Harting plug (standard) |
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Certifications |
CE, ATEX, IEC-Ex, CSA, UKCA |
The PR9268/301-000 is a passive electrodynamic velocity sensor from Emerson‘s EPRO PR9268 series, purpose‑built for absolute casing vibration measurement on critical turbomachinery. Designed for horizontal installation, the PR9268/301-000 delivers a sensitivity of 28.5 mV/mm/s across a 4 to 1000 Hz frequency range. The PR9268/301-000 requires no external power supply and generates its output signal via electromagnetic induction. With a rugged aluminum housing, 5‑meter armored cable, IP55 rating, and ATEX/IEC‑Ex intrinsic safety certification, the PR9268/301-000 is ideal for harsh industrial environments on steam turbines, gas turbines, compressors, pumps, and fans.
Mounting Orientation – Horizontal only, within ±10° of horizontal plane; no lifting/sinking current required.
Mounting Surface – Secure firmly to bearing housing or machine casing using the threaded mounting hole (M8 or equivalent).
Cable Routing – Use the 5‑meter armored cable; observe minimum bend radius to avoid damaging the PTFE insulation and stainless steel armor.
Electrical Connection – Standard Harting plug connector (or open cable ends depending on variant). Connect to a high‑impedance input circuit (nominally 100 kΩ) to maintain specified sensitivity.
Shielding – Use shielded twisted‑pair cable for extensions; connect shield at the monitoring system end only.
Grounding – Ensure sensor housing is grounded through the mounting bracket to avoid ground loops.
Passive, Self‑Powered Operation – No external excitation voltage required; generates signal via electromagnetic induction
Horizontal Orientation – Optimized for ±10° horizontal installation without lifting/sinking current
High Sensitivity – 28.5 mV/mm/s delivers strong output signal for reliable vibration monitoring
Wide Frequency Range – 4 to 1000 Hz covers low‑speed and high‑speed machinery
Rugged Construction – Aluminum housing (Al Mg Si Pb F 28) with IP55 protection
Armored Cable – 5‑meter PTFE‑insulated cable with stainless steel armor for durability
Hazardous Area Certified – ATEX, IEC‑Ex, CSA intrinsic safety (ia) approvals
Low Transverse Sensitivity – 0.27 @ 110 Hz minimizes cross‑axis errors
The PR9268/301-000 is a seismic velocity sensor based on the moving‑coil principle. It consists of a permanent magnet fixed to the sensor housing and a coil assembly suspended by a spring system. When the machine casing vibrates, the housing and magnet move relative to the inertial coil mass. This relative motion causes the coil to cut through the magnetic field, inducing a voltage proportional to the relative velocity.
The sensor‘s mechanical spring‑mass system has a natural frequency of 4.5 Hz. Above this frequency, the output voltage is directly proportional to vibration velocity across the 4 to 1000 Hz range. The sensor is self‑powered and requires no external excitation; however, it must be connected to a high‑impedance input (100 kΩ nominal) to maintain the specified sensitivity. The output is an AC voltage signal proportional to the absolute vibration velocity of the machine casing in the horizontal axis.
Q1: What is the difference between PR9268/301-000 and other PR9268 variants?
A1: The PR9268/301-000 is specifically designed for horizontal mounting (±10°). Vertical variants include the PR9268/20x‑x00 (±30°) and PR9268/60x‑x00 (±60° with sinking current). Sensitivity and frequency range also differ between variants.
Q2: Does the PR9268/301-000 require an external power supply?
A2: No. The PR9268/301-000 is a passive, self‑powered sensor that generates its output signal via electromagnetic induction. It requires no excitation voltage but must be connected to a high‑impedance input circuit (100 kΩ nominal).
Q3: What is the maximum vibration amplitude the sensor can measure?
A3: The mechanical limit is 3000 µm (4000 µm peak‑peak). The sensor can handle up to 10 g continuous acceleration and 20 g intermittent.
Q4: Can the PR9268/301-000 be used in hazardous areas?
A4: Yes. The PR9268/301-000 has intrinsic safety (ia) certification for ATEX, IEC‑Ex, and CSA, making it suitable for use in explosive atmospheres (Zone 0/1).
Q5: What is the standard cable length and connector type?
A5: The standard configuration includes a 5‑meter armored cable with a Harting plug connector. Other cable lengths and open cable end options are available as special versions.
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