EPRO PR9268/303-000 Electrodynamic Velocity Sensor | Horizontal Absolute Vibration Transducer

EPRO PR9268/303-000 is a passive electrodynamic velocity transducer from EPRO (Emerson AMS), belonging to the PR9268/30x horizontal mounting series for absolute casing vibration measurement on rotating machinery. This sensor adopts seismic principle, no external power supply required, and outputs voltage signal linearly proportional to vibration velocity, designed for turbomachinery protection and online condition monitoring systemsEmerson.

Its internal structure consists of a seismic coil suspended by membrane springs inside a permanent magnet housing. When the equipment casing vibrates, the sensor shell moves together with the casing while the seismic mass stays relatively static; the relative movement cuts magnetic field and generates vibration velocity signal. The resonance frequency is 4.5 Hz, stable working band covers 4 Hz to 1000 Hz, suitable for low-frequency casing vibration monitoring of steam turbines, gas turbines and large compressors.

PR9268/303-000 is specified for horizontal installation with ±10° mounting tolerance, same installation angle rule as PR9268/302-100. Mechanical vibration limit reaches 3000 μm peak-to-peak, amplitude linearity better than 2%. Low impedance coil design brings strong anti-interference performance, raw signal can be fed directly to MMS3000 and MMS6000 monitoring modules without extra preamplifier, simplifying field wiring and reducing signal attenuation on long cable runsEmerson.

Housing material is Al Mg Si alloy, protection grade IP55, applicable under non-condensing humidity 0–100%. Standard cable is PTFE insulated 3×0.5mm² with stainless steel armor, fitted with Harting connector. Net weight is 930g, rugged mechanical construction withstands dust, splash and continuous vibration in power plant, oil & gas, chemical and heavy industry sites.

The difference between suffix 000 and 100 in PR9268/30x series mainly lies in factory calibration and cable/connector configuration. PR9268/303-000 uses standard base without pre-fixed cable length option; PR9268/302-100 is the variant with fixed cable assembly. If vertical casing vibration measurement is required, select PR9268/20x series; wide-angle high-temperature models are PR9268/60x and PR9268/70x variantsEmerson.

Common application scenarios of EPRO PR9268/303-000: steam turbine casing vibration, gas turbine bearing housing, centrifugal compressor, axial fan, boiler feed water pump, gearbox and coal mill. It continuously captures casing vibration to detect unbalance, misalignment, support looseness and bearing deterioration, supporting protection trip logic and predictive maintenance plans.

We supply genuine EPRO PR9268/303-000 vibration velocity sensor, stock available. We can provide official datasheet, COO certificate, factory test report and 12-month warranty. Send inquiry for compatibility cross-check with your existing MMS rack, matching Harting spare connectors and bulk pricing.

Bullet Points

• Model: PR9268/303-000
• Brand: EPRO (Emerson AMS)
• Type: Electrodynamic velocity / absolute casing vibration sensor
• Mounting: Horizontal, ±10° allowable angle deviation
• Frequency response: 4 Hz – 1000 Hz
• Max mechanical amplitude: 3000 μm peak-peak
• Operation type: Passive sensor, no 24V excitation power needed
• Compatible system: EPRO MMS3000, MMS6000 machinery monitoring
• Protection class: IP55
• Cable: PTFE insulation, stainless steel armored cable, Harting plug
• Housing: Al Mg Si alloy
• Net weight: 930 g
• Origin: Germany
• Typical use: Turbine, compressor, pump, fan casing vibration protection

FAQ

Q: What is PR9268/303-000 used for? A: EPRO PR9268/303-000 is a horizontal passive velocity sensor for absolute casing vibration measurement, paired with MMS3000 / MMS6000 racks for turbine and compressor machinery protection.

Q: What is the difference between PR9268/303-000 and PR9268/302-100? A: Both are horizontal 30x series with same core specs, frequency range and mounting tolerance. The suffix difference relates to cable assembly and factory configuration: 000 is base sensor variant, 100 comes with pre-defined cable assembly.

Q: Can PR9268/303-000 work vertically? A: Not recommended. This is horizontal variant (30x series). Choose PR9268/20x series for vertical mounting.

Q: Is this sensor active or passive? A: Passive electrodynamic seismic sensor, no external power supply required. Output signal proportional to vibration velocity.

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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