Bently Nevada 1900/55-02-01-01-00 Fan Vibration Monitor

Product Overview

The Bently Nevada 1900/55-02-01-01-00 is a compact monitoring system designed for industrial fans and gearboxes.
It delivers continuous vibration and temperature monitoring for low-speed rotating equipment in demanding process environments.
Moreover, the system combines protection, indication, and data output within a single rugged industrial housing.
Engineers commonly select this model when reliable fan operation directly affects plant safety and production stability.

Functional Highlights

The system supports four total monitoring channels, enabling simultaneous supervision of vibration and temperature conditions.
In addition, its low-frequency response starting at 1.5 Hz ensures accurate detection on slow-speed fans and gear-driven assets.
Analog 4–20 mA outputs allow straightforward integration with PLC, DCS, or SCADA platforms.
Therefore, maintenance teams gain real-time visibility without deploying complex vibration analysis infrastructure.
The front-panel LCD provides clear operating status, alarm indication, and live measurement values for local diagnostics.

Technical Specifications

Manufacturer: Bently Nevada (GE)
Model Number: 1900/55-02-01-01-00
Product Type: Fan Vibration Monitor

Monitoring Channels:

• Vibration Inputs: 2 channels, supporting 3-wire accelerometers or 2-wire velocity sensors

• Temperature Inputs: 2 channels, supporting 100 Ω platinum RTDs or Type K or T thermocouples

Measurement Capability:

• Frequency Response: Low-frequency detection starting at 1.5 Hz

• Application Focus: Low-speed fans, gearboxes, and auxiliary rotating machinery

Outputs and Alarms:

• Analog Outputs: 4–20 mA proportional to monitored vibration and temperature variables

• Relay Outputs: 4 SPDT relays, configurable as normally energized or de-energized

Electrical and Environmental:

• Power Consumption: Maximum 10 W

• Operating Temperature: –20 °C to +70 °C (–4 °F to +158 °F)

• Environmental Rating: NEMA 4X / IP66, dust-tight and water-resistant

• Housing: Rugged industrial-grade enclosure

Typical Applications

This monitor is widely used on induced draft fans, forced draft fans, and cooling tower fan systems.
For instance, process industries apply it on gear-driven fans where early fault detection prevents costly shutdowns.
Moreover, it suits cement, power generation, metallurgy, and chemical plants operating large numbers of critical fans.
System integrators often deploy the unit as a standalone protection device or as part of a broader condition monitoring strategy.

Reliability and Service

Bently Nevada designed the 1900/55 series for long-term operation in harsh industrial environments.
Therefore, the system minimizes maintenance requirements while delivering consistent measurement accuracy over extended service life.
Its straightforward wiring and configuration reduce commissioning time during both new installations and retrofit projects.

FAQ

Q1: What types of sensors can be connected to the 1900/55-02-01-01-00?
A1: The unit supports 3-wire accelerometers or 2-wire velocity sensors for vibration, plus RTDs or thermocouples for temperature.

Q2: Is this monitor suitable for low-speed fan applications?
A2: Yes, the system detects vibration signals starting at 1.5 Hz, making it ideal for slow-speed fans and gearboxes.

Q3: Can the outputs connect directly to a PLC or DCS?
A3: The 4–20 mA analog outputs connect directly to standard PLC, DCS, or SCADA input modules.

Q4: Does the unit provide local indication and alarms?
A4: Yes, a backlit LCD displays real-time values, while configurable relays support alarm and shutdown logic.