Bently Nevada 3500/92 & 3500/93 Proximitor Sensor | Replacement, Equivalent & Selection Guide
The Bently Nevada 3500/92 and 3500/93 are high-precision Proximitor® Sensors designed for the 3500 Series Machinery Protection System. They convert eddy-current probe signals into DC voltage outputs proportional to the gap between the probe tip and the observed rotating shaft — critical for continuous vibration and position monitoring in turbomachinery.
Technical Specifications
- Model Numbers: 3500/92, 3500/93
- Series: Bently Nevada 3500 Machinery Protection System
- Function: Proximitor® Signal Conditioner / Eddy-Current Sensor Interface
- Output: DC voltage proportional to probe gap (typically –24 VDC system)
- Compatible Probes: 3300 XL 8mm, 3300 5mm, 7200 Series eddy-current probes
- Mounting: DIN rail / rack-mount within 3500 chassis
- Operating Temperature: –40°C to +85°C (sensor); probe range varies by model
- Approvals: CE, SIL, FM, CSA (varies by configuration)
- Weight: ~150 g
- Manufacturer: Baker Hughes (Bently Nevada)
Compatible Replacement & Equivalent Models
When sourcing a replacement for the 3500/92 or 3500/93, the following models are functionally compatible or serve as direct equivalents in many applications:
- Bently Nevada 3500/92 → 3500/93: Upgraded version with enhanced diagnostics; direct form-fit-function replacement in most 3500 chassis configurations.
- Bently Nevada 330180-X-XX: 3300 XL 8mm Proximity Transducer System — compatible probe for use with 3500/92 or 3500/93 Proximitor.
- Bently Nevada 330130-X-XX: 3300 5mm Proximity Transducer System — alternative probe pairing.
- Emerson CSI 6500 ATG: Alternative platform for new installations; not a drop-in replacement but functionally equivalent for vibration monitoring.
- Metrix ST5484E: Third-party eddy-current transmitter; compatible in non-OEM retrofit scenarios with signal conditioning verification required.
⚠ Always verify probe-Proximitor pairing (gap voltage, sensitivity, cable length) before substitution. Contact Konmask for selection assistance.
Why Choose the Original Model
- System Integrity: Factory-matched to Bently Nevada 3500 rack — ensures API 670 compliance without re-certification.
- Proven Reliability: Deployed in thousands of critical turbomachinery installations worldwide (gas turbines, steam turbines, compressors, pumps).
- OEM Support: Full Baker Hughes / Bently Nevada technical support, firmware compatibility, and spare parts availability.
- Calibration Traceability: Ships with factory calibration certificate; traceable to NIST standards.
- Long Service Life: Designed for continuous 24/7 operation in harsh industrial environments.
Typical Applications
- Gas turbine shaft radial vibration and axial position monitoring
- Steam turbine differential expansion and eccentricity measurement
- Centrifugal compressor rotor dynamics monitoring
- Pump and motor bearing vibration surveillance
- Gearbox and expander protection systems
- Power generation and petrochemical plant machinery protection
System Compatibility
- Rack: Bently Nevada 3500 Series Machinery Protection System
- Monitors: 3500/40M, 3500/42M, 3500/44M, 3500/45, 3500/46M, 3500/50M, 3500/53, 3500/60, 3500/61, 3500/62, 3500/64, 3500/70M, 3500/72M
- Probes: 3300 XL 8mm, 3300 5mm, 7200 Series (verify sensitivity: 7.87 V/mm or 200 mV/mil)
- Extension Cables: 3300 XL, 330130, 330180 series matched cables
- Communication: Compatible with System 1 Evolution software for condition monitoring
Selection Guide
Use the following criteria to select the correct Proximitor model for your application:
- Step 1 — Identify existing probe: Confirm probe model (3300 XL 8mm vs. 5mm vs. 7200 series) and cable length.
- Step 2 — Check gap voltage range: Standard linear range is –2 VDC to –18 VDC; confirm your installation gap falls within this range.
- Step 3 — Confirm chassis slot: 3500/92 and 3500/93 occupy specific I/O module slots — verify slot assignment in your rack layout drawing.
- Step 4 — Verify hazardous area classification: If installed in Zone 1/Division 1 areas, confirm IS (intrinsically safe) or Ex-rated variant is required.
- Step 5 — Check firmware revision: For System 1 integration, confirm Proximitor firmware is compatible with your System 1 version.
Not sure which model fits your system? Contact our selection team with your rack drawing or existing part number.
Quality Assurance & Sourcing
- All units sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Pre-shipment inspection includes visual check, label verification, and where applicable, functional bench test.
- Counterfeit-risk mitigation: serial number verification against Bently Nevada / Baker Hughes records upon request.
- Packaging: original OEM packaging preserved where available; otherwise ESD-safe anti-static packaging.
- Lead time: in-stock units ship within 1–3 business days; sourced units typically 5–15 business days.
How to Order
- Confirm your exact part number: 3500/92 or 3500/93 (check nameplate or rack drawing).
- Specify any required options: cable length, connector type, hazardous area rating.
- Add to cart or contact us directly for bulk / project pricing.
- Provide your shipping address and preferred freight method (DHL, FedEx, UPS, sea freight available).
- Receive order confirmation with tracking within 24 hours of payment.
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I use a 3500/93 to replace a 3500/92?
A: In most cases yes — the 3500/93 is the successor model with backward compatibility. Verify slot type and firmware revision before swapping.
Q: Is the 3500/92 still in production?
A: Baker Hughes has transitioned to the 3500/93 as the current production model. The 3500/92 is available as a spare/surplus unit.
Q: Can I use a third-party Proximitor with my Bently Nevada 3500 rack?
A: Technically possible with signal-compatible units, but this may void API 670 compliance and OEM warranty. Consult your machinery protection engineer.
Q: What is the typical lead time for a 3500/92 or 3500/93?
A: In-stock units ship within 1–3 business days. Contact us for current stock status.
Q: Do you provide a warranty?
A: Yes — all units carry a minimum 90-day warranty against defects. Extended warranty available upon request.
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Contact: support@konmask.com | +0086 19859288691
