Product Introduction: 16925-99
The 16925-99 is a Proximity Transducer System (PTS) Extension Cable manufactured by Bently Nevada (now part of Baker Hughes). This component is not a monitoring module but a critical part of the sensor infrastructure. It is a double-shielded, coaxial cable specifically designed to connect an eddy current proximity probe (sensor) to the proximitor driver (the signal conditioner, often located in a 3500 rack or a separate frame). The "-99" suffix typically indicates a specific length, connector type, and temperature rating. These cables are engineered for high signal integrity in electrically noisy industrial environments and are built to withstand harsh conditions, including extreme temperatures and mechanical stress.
Technical Parameters
The key technical parameters for the 16925-99 Extension Cable are summarized in the table below.
| Parameter Category | Specification |
|---|---|
| Part Number | 16925-99 |
| Component Type | Proximity Transducer System (PTS) Extension Cable |
| Function | Extends the connection between a proximity probe and its proximitor. |
| Cable Type | Double-shielded coaxial cable with negative temperature coefficient (NTC) compensation. |
| Length | Specific length is defined by the part number suffix (e.g., -005 for 5 meters, -010 for 10 meters). The exact length for -99 must be verified from the datasheet. |
| Connectors | Typically a threaded, military-style connector (e.g., Bendix) on the probe end and a compatible connector for the proximitor interface. |
| Operating Temperature | Typically -40°C to +177°C (-40°F to +350°F) or higher, depending on the specific -99 rating. |
| Dimensions (Cable) | Diameter: Approx. 5.5 mm (0.22 in). Length: As specified by the part number. |
| Weight | Varies directly with length. Approx. 0.15 kg/m (0.1 lb/ft). A 5-meter cable would weigh ~0.75 kg (1.65 lbs). |
| Key Features | • NTC compensation for accurate gap voltage over temperature • Double shielding for immunity to electromagnetic interference (EMI) • Robust construction for industrial environments • Maintains signal integrity over long distances |
*Note: The exact length, connector mating, and temperature rating for the "-99" variant are critical and must be confirmed from the official Bently Nevada PTS datasheet to ensure compatibility with the specific probe and system.*
Application Scenarios
The 16925-99 extension cable is used wherever eddy current proximity probes are installed for machinery monitoring. Its primary role is to ensure a reliable signal path.
Radial Vibration Monitoring: Connecting proximity probes mounted on bearing housings to the monitoring system (e.g., a 3500/25 module) to measure shaft relative vibration.
Axial (Thrust) Position Monitoring: Connecting the dual probes used to measure the axial position of a rotor in turbines and compressors.
Keyphasor® and Speed Reference: Connecting the Keyphasor probe to the monitoring system (e.g., a 3500/15 module) to provide a once-per-revolution timing pulse.
Differential Expansion Monitoring: Connecting probes used to measure the differential expansion between a rotor and a stator.
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