Brief Product Description

EPRO PR9268/200-000 is a vertical installation electrodynamic absolute vibration velocity sensor, belonging to Emerson PR9268 series, used together with MMS3000 / MMS6000 rotating machinery protection system. It is self-generating type without external power supply, adopting electromagnetic induction principle to output AC voltage signal proportional to vibration velocity, for bearing housing absolute vibration measurement. The 200 version is vertical mounting type (allowable deviation ±60°), sensitivity 28.5 mV/mm/s, frequency response 10~1000Hz, maximum operating temperature up to 200℃. It has explosion-proof certification EEx ib IIB/IIC, IP55/IP65 rugged housing, suitable for high temperature and hazardous area turbine machinery monitoring. As a legacy machinery monitoring spare sensor, it is available as fully-tested surplus and refurbished units for maintenance and retrofit of existing EPRO MMS series rack installations.

Core Product Functions

• Electrodynamic self-generating sensor for measuring absolute vibration velocity of bearing housings
• Vertical installation design, installation angle tolerance ±60°, sensitivity:28.5 mV/mm/s
• Frequency range 10~1000Hz, peak-peak vibration amplitude up to 2mm, for casing vibration monitoring
• No external power required; outputs AC signal proportional to vibration velocity to MMS monitor module
• High temperature resistance up to 200℃, stainless steel rugged housing for harsh industrial environment
• Intrinsically safe EEx ib IIB/IIC explosion-proof certification, can be used in Zone1 hazardous area with safety barrier
• Cooperates with MMS6000/MMS3000 monitoring racks to realize vibration alarm and trip protection logic
• Measure casing vibration of turbine, compressor, fan and pump for equipment condition monitoring

• Used for predictive maintenance and machinery protection to detect unbalance, looseness and bearing faults

Application Scenarios

• Power plant steam turbine, gas turbine, boiler feed pump bearing housing absolute vibration monitoring
• Oil & gas, petrochemical compressors, fans, gearboxes and large rotating equipment protection
• Coal mill, large centrifugal pump and industrial fan casing vibration measurement
• High-temperature bearing pedestals and hazardous process area machinery health monitoring
• Legacy MMS3000 / MMS6000 machinery protection system upgrade and sensor retrofit projects
• Spare replacement absolute vibration sensor for maintenance of existing EPRO MMS monitoring systems

FAQ (Frequently Asked Questions)

• Q: The vibration reading is zero or unstable after installing PR9268/200-000?
  A: Check mounting bolt tightness, cable insulation and shielding, connector integrity, monitor channel configuration and sensor coil continuity.
• Q: Does PR9268/200-000 need external power supply?
  A: No, it is self-generating electrodynamic sensor, vibration movement generates signal voltage by electromagnetic induction.
• Q: What is difference between PR9268/200 and PR9268/300?
  A: PR9268/200 for vertical installation (±60°); PR9268/300 for horizontal installation (±30°), same sensitivity and frequency response.
• Q: What system matches PR9268/200-000?
  A: It works with EPRO MMS3000 and MMS6000 machinery protection monitoring racks, matched vibration input modules.
• Q: Is EPRO PR9268/200-000 available for brand-new machinery monitoring projects?
  A: This legacy electrodynamic velocity sensor has reached end-of-life. Only fully-tested surplus and refurbished units are offered for existing-site maintenance and retrofit tasks.