Introduction
The EPRO 330101-13-37-15-02-RU is a specific model of a proximitor transducer, a key component in the EPRO (now part of Baker Hughes) machinery condition monitoring ecosystem. This device acts as the signal conditioner for eddy current proximity probes (like the PR 642x series).
While the probe itself generates a raw RF signal, the proximitor is responsible for powering the probe, demodulating this signal, and converting the distance information into standardized, high-level DC voltage outputs (-1 V to -11 V DC for the 2 mm range, or -2 V to -22 V DC for the 4 mm range) that represent dynamic vibration and static position. The "-RU" suffix indicates this version is certified or configured for the Russian market. It is designed for continuous, real-time monitoring of radial vibration, axial position, and speed on critical rotating machinery.
Parameters / Specifications
The key technical specifications for the EPRO 330101-13-37-15-02-RU are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330101-13-37-15-02-RU |
| Product Line / Type | EPRO (Baker Hughes) Proximitor Transducer (e.g., PR 6426/..-.. series) |
| Function | Signal Conditioner for Eddy Current Probes |
| Compatible Probes | 8 mm Eddy Current Probes (e.g., PR 6423 series) |
| Input Power | Typically +24 V DC (Dual-wire, intrinsically safe versions exist) |
| Output Signals | Vibration/Displacement: -1 to -11 V DC (or -2 to -22 V DC) proportional to gap. Gap Voltage: A separate DC voltage proportional to the average gap between the probe and the shaft. |
| Frequency Response | 0 to 10 kHz (-3 dB) |
| Linear Range | 2 mm or 4 mm (depending on internal configuration/jumpers), typically centered on a 1.5 mm gap. |
| Operating Temperature | -35°C to +85°C (-31°F to +185°F) |
| Cable Length | The integrated cable length is typically 5 meters (This is a key interpretation of the -37 suffix in the part number). |
| Connector | Military-style (MS), 3-pin (This is a key interpretation of the -13 suffix). |
| Housing Dimensions (Approx.) | A compact, robust metal enclosure, typically around 80 mm x 60 mm x 40 mm (L x W x H). |
| Weight (Approx.) | 0.55 lbs (0.25 kg) |
| Market Certification | RU (Configured/Certified for use in the Russian Federation) |
*Note: This proximitor requires a compatible 8 mm eddy current probe and a suitable power supply to form a complete measuring chain. The "15-02" suffixes likely specify a high-temperature cable option and a specific calibration.*
Application Scenarios
This proximitor transducer is mounted directly on or near the machine's bearing housing, forming the crucial link between the sensor (probe) and the monitoring system (like a PLC, DCS, or dedicated rack like the EPRO MMS 6000).
Typical application scenarios include:
Integration into Turbine Supervisory Instrumentation (TSI):
Mounted on the casing of gas and steam turbines to provide conditioned vibration and position signals to the main protection system for continuous monitoring and automatic shutdown.
Compressor Monitoring in Hazardous Areas:
Used on pipeline and process compressors. When configured as an intrinsically safe (IS) device, it can be installed in potentially explosive atmospheres, providing crucial vibration data while ensuring operational safety.
Monitoring of Large Pumps and Fans:
Provides a robust, 2-wire 4-20 mA or voltage output for radial vibration, allowing plant control systems to track machine health and generate alarms for predictive maintenance on critical pumps and fans in power plants and water treatment facilities.
Shaft Position and Eccentricity Monitoring:
Used to measure slow-roll (eccentricity) of a turbine shaft before start-up and after shut-down, as well as the axial position of the rotor to prevent thrust bearing failure.
Industries of Use:
Oil & Gas (Onshore and offshore production, refineries, pipelines)
Power Generation (Thermal, nuclear, and hydroelectric plants)
Petrochemical & Chemical Industries
Heavy Industrial Manufacturing
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