Introduction
The EPRO 330930-060-00-05 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 (as opposed to shaft relative vibration) on a wide range of industrial machinery.
Unlike eddy current probes that measure shaft motion relative to the bearing housing, this sensor measures the actual vibration 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. The "-05" suffix typically indicates a specific connector or mounting thread configuration.
Parameters / Specifications
The key technical specifications for the EPRO 330930-060-00-05 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330930-060-00-05 |
| Product Line / Type | EPRO (Baker Hughes) Velocity Seismic Sensor |
| Measured Parameter | Casing Vibration Velocity |
| Sensitivity | 100 mV/in/s (or a similar standard value; the -060 may refer to a specific sensitivity or frequency response) |
| Frequency Range | Typically 4.5 Hz to 1000 Hz (e.g., 270 to 60,000 CPM) |
| Dynamic Range | 0 to 1.0 in/s (0 to 25.4 mm/s) peak (typical for general purpose monitoring) |
| Output Signal | Analog Voltage (proportional to velocity) |
| Power Supply | Requires external power from a compatible signal conditioner/monitor. |
| Electrical Connection | 5-pin, Military-style (MS) connector (a common interpretation of the -00 suffix). |
| Mounting | Single 1/4-28 UNF or M6 threaded stud on the base. |
| Housing Material | Stainless Steel |
| Sensing Orientation | Specific to one axis (uniaxial). Must be mounted in the correct orientation for measurement. |
| 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 the -060 and -00 suffixes should be verified with the official EPRO datasheet for this specific part number, as codes can vary.
Application Scenarios
This velocity sensor is used for general-purpose machinery condition monitoring on a wide variety of equipment where measuring the overall vibration of the machine structure is sufficient for detecting developing faults.
Typical application scenarios include:
Motor and Pump Casing Monitoring:
Permanently installed on the bearing housings of critical motors, centrifugal pumps, and fans to detect overall vibration levels caused by imbalance, misalignment, bearing defects, or structural resonance.
Fan and Blower Monitoring:
Mounted on the casings of large induced draft (ID) and forced draft (FD) fans in power plants and HVAC systems to monitor for vibration due to fouling, imbalance, or mechanical looseness.
General Machinery Health Assessment:
Used for periodic or continuous monitoring on a wide range of industrial machinery, such as compressors, gearboxes, and machine tools, to provide a trendable 4-20 mA or voltage signal for predictive maintenance programs.
Non-Critical Equipment Protection:
Providing a cost-effective solution for alarm and shutdown protection on a large number of general-purpose machines where the installation of a full eddy current probe system is not economically justified.
Industries of Use:
Power Generation (for auxiliary equipment)
Water and Wastewater Treatment
Chemical and Petrochemical Processing
HVAC
General Manufacturing and Heavy Industry
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