Description
Bently Nevada 330171-08-26-05-02-00
Technical Specifications
- Model: 330171-08-26-05-02-00
- Series: 3300 5 mm Proximity Probe
- Probe Diameter: 5 mm
- Thread Type: 1/4-28 UNF
- Unthreaded Length: 0.8 inch
- Overall Case Length: 2.6 inches
- Total Cable Length: 0.5 meter (1.6 feet)
- Connector Option: 02 — Miniature coaxial ClickLoc connector, standard cable
- Agency Approval: 00 — Not required
- Linear Range: 1.0 mm (40 mils)
- Scale Factor: 7.87 V/mm (200 mV/mil)
- Frequency Response: 0 Hz to 10 kHz
- Operating Temperature: -35°C to +177°C
- Weight: 0.323 kg
Function Features
- Eddy current non-contact sensing technology
- Direct measurement of shaft vibration and position
- Compatible with 3300 series Proximitor sensors
- Static and dynamic measurement capability
- Voltage output proportional to gap distance
- Patented TipLoc molding for robust probe tip bonding
- CableLoc design providing 330 N pull strength
Application Scenarios
- Turbine vibration monitoring installations
- Compressor shaft position tracking
- Pump and fan bearing condition assessment
- Rotating machinery protection systems
- Industrial predictive maintenance programs
- Keyphasor reference mark detection
Performance Parameters
- Scale factor is 7.87 V/mm (200 mV/mil)
- Linear range is 1.0 mm
- Reference gap is 1.27 mm setup distance
- Operating voltage is -17.5 to -26 Vdc
- Typical system voltage is -24 Vdc
- Maximum current is 12 mA
- Output resistance is 50 Ω
- Probe resistance is 7.59 ± 0.50 Ω
- Voltage sensitivity drift is less than 2 mV per volt
- Magnetic field tolerance is up to 300 Gauss
Material Composition
- Probe case is AISI 304 stainless steel
- Probe tip is Polyphenylene sulfide (PPS) polymer
- Cable is coaxial with FEP insulation
- Connector is gold-plated miniature coaxial
Structural Characteristics
- 2.6-inch overall case length for specific mounting requirements
- 0.8-inch unthreaded length
- 1/4-28 UNF mounting thread
- Integral 0.5-meter cable with probe body
- Miniature coaxial ClickLoc connector
- Compact design for installations with limited space
Working Principle The probe operates using eddy current technology. The probe coil, energized by the Proximitor sensor, creates an electromagnetic field at the probe tip. When a conductive target is present, circulating eddy currents are generated in the target material. The Proximitor sensor detects the resulting impedance change and generates a DC voltage output that varies linearly with the distance between probe tip and target surface.
Installation Requirements
- Mount in 1/4-28 UNF threaded hole with appropriate tap drill
- Maintain perpendicular alignment to target surface
- Recommended tightening torque is 5.1 N·m
- Maximum safe torque is 7.3 N·m
- Set initial gap voltage within linear range
- Connect to compatible 3300 series extension cable and Proximitor sensor
Operating Considerations
- Target material must be conductive and match calibration standard
- Avoid probe-to-shaft contact during operation
- Maintain minimum cable bend radius of 25.4 mm
- Inspect cable and connector condition regularly
- Replace if probe tip shows wear or damage
- Use connector protection cap when not connected
