Introduction
The EPRO 330130-040-10-CN is a specific model of a Velocity Seismic Sensor from EPRO (now part of Baker Hughes). This device is designed for continuous monitoring of absolute casing vibration on a wide range of industrial machinery. The -CN suffix indicates this version is configured or certified for the Chinese market.
Unlike eddy current probes that measure shaft motion relative to the bearing housing, this sensor measures the actual vibration velocity of the machine's structure or casing itself. It contains a permanent magnet seismic mass suspended by a spring within a coil. When the casing vibrates, the coil moves relative to the magnet, generating an analog voltage output signal proportional to the vibration velocity. This makes it ideal for monitoring machines where non-contact probe installation is not feasible or for capturing overall structural vibration.
Parameters / Specifications
The key technical specifications for the EPRO 330130-040-10-CN are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330130-040-10-CN |
| Product Line / Type | EPRO (Baker Hughes) Velocity Seismic Sensor |
| Measured Parameter | Casing Vibration Velocity |
| Sensitivity | 100 mV/in/s (This is a key interpretation of the -040 suffix) |
| Frequency Range | 4.5 Hz to 1000 Hz (270 to 60,000 CPM) |
| Amplitude Range | 0 to 1.0 in/s (0 to 25.4 mm/s) peak |
| Output Signal | Analog Voltage (proportional to velocity) |
| Power Supply | None required (passive device) |
| Electrical Connection | Integrated, unconnectorized cable (This is a key interpretation of the -10 suffix) |
| Market Certification | CN (Configured/Certified for use in the Chinese market) |
| Mounting | Single 1/4-28 UNF or M6 threaded stud on the base |
| Housing Material | Stainless Steel |
| Sensing Orientation | Specific to one axis (uniaxial) |
| Dimensions (Approx.) | Diameter: ~1.9 in (48 mm), Height: ~2.4 in (61 mm) |
| Weight (Approx.) | 1.1 lbs (0.5 kg) |
| Operating Temperature | -50°C to +120°C (-58°F to +248°F) |
Note: The exact interpretation of suffixes should be verified with the official EPRO datasheet for this specific part number.
Application Scenarios
This velocity sensor is used for general-purpose machinery condition monitoring where measuring overall structural vibration is sufficient for detecting developing faults.
Typical Application Scenarios:
Motor and Pump Casing Monitoring:
Permanently installed on bearing housings of critical motors and centrifugal pumps to detect vibration caused by imbalance, misalignment, and bearing defects.
Fan and Blower Monitoring:
Mounted on casings of induced draft (ID) and forced draft (FD) fans to monitor vibration from fouling, imbalance, or mechanical looseness.
General Machinery Health Assessment:
Used for continuous monitoring on compressors, gearboxes, and other industrial machinery for predictive maintenance programs.
Non-Critical Equipment Protection:
Providing cost-effective vibration monitoring for general-purpose machines where full eddy current systems are not justified.
Industries of Use:
Power Generation (auxiliary equipment)
Water and Wastewater Treatment
Chemical and Petrochemical Processing
HVAC Systems
General Manufacturing and Heavy Industry
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