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Help CenterBently Nevada 1900/55 Fan Monitor – Purpose-built Protection and Condition Monitoring for Industrial Fans
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Warranty: 365 days
Delivery: 1 week for in-stock; no more than one month at the latest
Payment: 50% advance payment; full payment before delivery
Express options: FedEx, UPS, DHL
Fan-focused monitoring logic: Alarms tuned for typical fan issues (imbalance, looseness, bearing faults, and overspeed) to reduce nuisance trips.
Dynamic vibration inputs: Typically supports case-mounted velocity/accelerometer sensors for quick installation on fan housings and bearing pedestals.
Speed / Keyphasor input: Provides speed and phase reference for overspeed protection and blade-pass tracking.
Protected outputs: 4–20 mA process outputs for DCS trending; alarm/trip relays for interlocks and shutdown.
Simple integration: RS‑485 Modbus RTU for easy connection to DCS/PLC and historian systems.
Compact, panel-mount design: Fits neatly in existing cabinets, making retrofits on legacy fan skids straightforward.
Compatible with Bently Nevada sensors: Works with well-known Bently Nevada accelerometers, velocity sensors, and Keyphasor pickups commonly stocked at plants.
| Brand / Model | Bently Nevada 1900/55 Fan Monitor |
| HS Code | 9032.89 (Automatic regulating or controlling instruments and apparatus) |
| Power Requirements | 24 VDC nominal (commonly 18–36 VDC in many installations) |
| Operating Temperature | Typically -20 to +65 °C (industrial cabinet environment) |
| Signal Inputs | 2× dynamic vibration (accelerometer/velocity); 1× Keyphasor/speed; optional temperature channels in some builds |
| Outputs | 4–20 mA process outputs; alarm/trip relay contacts (Form C, quantity depends on configuration) |
| Communication Interfaces | RS‑485 (Modbus RTU) for remote monitoring and control integration |
| Installation Method | Panel-mounted in control cabinet; shielded wiring to sensors; earth/functional grounding recommended |
The 1900/55 is purpose-built for fan assets that run continuously and rarely get downtime. Typical use cases:
Power generation: ID/FD/PA fans and cooling tower fans
Petrochemical & refining: process blowers and combustion air fans
Metals, cement, and mining: large exhaust and baghouse fans
Pulp & paper: induced-draft and evaporator fans
HVAC & utilities: high-horsepower supply/return fans
A maintenance manager told me they replaced periodic walk‑around checks with the 1900/55 on a critical ID fan; the 4–20 mA trend into their DCS gave them a two‑week early warning on a bearing issue, which typically would have led to a weekend outage if it wasn’t caught.
Reliability: Built on Bently Nevada’s protection philosophy—stable alarms and dependable relays reduce unplanned trips.
Compatibility: Works with widely used Bently Nevada sensors and Keyphasor pickups; easy to source spares.
Cost-effective deployment: In many cases more economical than a multi-slot rack, especially for single-machine retrofits.
Simplified integration: 4–20 mA and Modbus RTU make it straightforward to pull trends into your DCS/PLC without extra gateways.
Faster commissioning: Fan-specific settings shorten site time and reduce tuning cycles.
Cabinet environment: Install in a ventilated control cabinet; keep ambient typically within -20 to +65 °C, and away from high EMI sources.
Power & grounding: Stable 24 VDC supply with proper earthing; separate sensor returns from power returns to minimize noise.
Wiring practices: Use shielded, twisted-pair cables for vibration and Keyphasor signals; terminate shields at the monitor end.
Sensor placement: Mount vibration sensors on bearing housings or fan casing near the load zone; align Keyphasor pickup and target with correct gap.
Alarm logic: Set 2‑stage alarms (Alert/Danger) with reasonable time delays to avoid false trips during run-up and coast-down.
Routine maintenance: Verify 4–20 mA scaling and relay function quarterly; inspect sensor mounts; clean terminals; review trend baselines after outages.
Firmware/config updates: Where applicable, keep configuration backups and document alarm setpoints for audit and quick recovery.
Typically compliant with CE requirements for industrial environments
UL/CSA certifications commonly available on Bently Nevada 1900‑series units
RoHS alignment appears on most recent builds
Manufacturer’s warranty practices are respected; our supply includes a 365‑day warranty
Bently Nevada 993/994 Accelerometers: Case-mounted sensors for vibration measurement on bearing housings; rugged, easy to retrofit.
Bently Nevada Velomitor 330500: Velocity transducer well-suited for low‑frequency fan imbalance/looseness detection.
Bently Nevada 3300 XL Keyphasor: Proximity probe and Keyphasor module for speed/phase reference and overspeed logic.
One thing I appreciate is that plants already using Bently Nevada sensors can usually reuse existing spares and mounting hardware, which cuts lead time and total cost in many cases.
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