Product Short Description
Manufacturer: Bently Nevada (Baker Hughes)
Product Overview:
The ANA-D3510-100-A1 is a dual-channel eddy current proximity transducer designed for measuring shaft displacement, vibration, and axial position in rotating machinery. The 120M8155-01 is the complete assembly including probe, extension cable, and driver.
Description
Technical Specifications:
| Parameter | Value |
|---|---|
| Measurement Type | Shaft displacement (relative), vibration (peak-to-peak) |
| Number of Channels | 2 (dual-channel) |
| Measurement Range | ±100 mils (±2.54 mm) total, or 0–100 mils (0–2.54 mm) unidirectional |
| Linearity | ±0.5% of full scale |
| Resolution | 0.025 mil (0.64 μm) |
| Frequency Response | 0 to 10 kHz (flat to 1 kHz, -3dB at 10 kHz) |
| System Bandwidth | DC to 10 kHz |
| Output | -10 to -24 VDC (peak), proportional to displacement |
| Supply Voltage | -18 to -24 VDC |
| Probe Tip Diameter | 8 mm or 5 mm (depending on sub-variant) |
| Probe Length | Standard 25 mm or 50 mm |
| Extension Cable Length | 5 meters (standard), 9 meters (optional) |
| Operating Temperature | -40°C to +125°C |
| Media Temperature | Up to +200°C (with high-temp probe) |
| Environmental Rating | IP67 (probe), IP65 (driver) |
| Certifications | ATEX, IECEx (hazardous area variants available) |
Functional Features:
- Dual-channel simultaneous measurement for X-Y orbit plotting
- Built-in zero-gap calibration reference
- Temperature-compensated output for stable readings
- Conforms to API 670 and API 617 standards
- Barrier-type probe design for oil-filled environments
- Integrated drive electronics in the driver housing
Working Principle:
The probe generates a high-frequency electromagnetic field (typically 1–2 MHz). When a conductive target (shaft) approaches, eddy currents are induced in the shaft surface, altering the probe’s impedance. The driver electronics convert this impedance change into a proportional DC voltage output representing shaft displacement.
Advantages:
- Non-contact measurement — zero wear, infinite life
- High-frequency response captures full vibration spectrum
- Dual-channel enables orbit analysis and shaft centerline tracking
- Robust construction for severe industrial environments
Applicable Industries:
Power generation (steam/gas turbines), oil & gas (compressors, pumps), petrochemical, mining, paper & pulp
Installation Requirements:
- Mount probe in flush-mounted holder perpendicular to shaft surface
- Maintain probe gap (target distance) within calibration range (typically 1.0 mm ± 10%)
- Use coaxial extension cable (supplied) — do not substitute
- Route cables away from high-voltage power lines (minimum 300mm separation)
- Ensure proper grounding of driver and extension cable shield
Usage Notes:
- Never power the system with the probe disconnected — this will damage the driver
- Perform initial gap voltage (IGV) calibration at operating temperature
- Verify probe linearity during commissioning
- Replace probe if gap voltage drifts beyond ±10% of calibration value
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