Introduction

The Bently Nevada 990-05-50-02-00 is a loop-powered vibration transmitter engineered for reliable monitoring of industrial rotating machinery. It converts mechanical vibration signals into a standardized 4–20 mA output for direct integration into automation and protection systems.

Its integrated architecture eliminates the need for external signal conditioning, reducing system complexity while maintaining stable and accurate vibration measurement performance. This model is widely used in OEM machinery applications where long-term reliability, compact installation, and standardized control integration are required.

Technical Specifications

Parameter	Specification
Product Model	990-05-50-02-00
Full-scale Range	0–5 mils pp (0–125 μm pp)
System Length	5.0 m (16.4 ft)
Mounting Type	Bulkhead screw mounting
Input Sensor	3300 NSv proximity probe compatible
Output Signal	4–20 mA proportional vibration signal
Power Supply	2-wire loop powered
Input Voltage	12–35 VDC
Operating Temperature	-35°C to +85°C
Storage Temperature	-51°C to +100°C
Loop Resistance	Up to 1000 Ω
Housing Material	Industrial-grade metal enclosure
Dimensions	100.1 × 73.9 × 53.3 mm
Weight	1.0 kg (2.20 lb)

Applications

The Bently Nevada 990-05-50-02-00 Vibration Transmitter is designed for continuous vibration monitoring of rotating machinery in industrial environments where reliable signal conversion and long-term stability are required for equipment protection and predictive maintenance.

Typical applications include:

Centrifugal and reciprocating compressors
Industrial pump systems and booster stations
HVAC ventilation and air handling units
Electric motors and drive assemblies
Turbine auxiliary systems
Petrochemical and refinery rotating machinery
Marine and offshore mechanical systems

It is widely used in OEM machinery installations that require compact integration and standardized 4–20 mA vibration output for control system compatibility.

Advantages

Integrated vibration sensing and signal conditioning in a compact transmitter design
Direct 4–20 mA output for PLC and DCS integration
Reduced wiring complexity and lower installation cost
Stable long-term signal performance for continuous monitoring applications
High resistance to industrial electromagnetic interference (EMI)
OEM-optimized mechanical structure for space-constrained installations
Supports predictive maintenance and condition-based monitoring strategies
Proven reliability in harsh industrial environments

Technical FAQs

Q1: What output signal does this transmitter provide?
It provides a 4–20 mA analog output proportional to vibration amplitude.

Q2: What is the full-scale range of this model?
It supports a 0–5 mils peak-to-peak (0–125 μm pp) measurement range.

Q3: Does it require external signal conditioning?
No, signal conditioning is fully integrated into the transmitter.

Q4: What equipment is it typically used on?
It is used on pumps, compressors, motors, fans, and other rotating machinery.

Q5: Can it operate in continuous monitoring mode?
Yes, it is designed for continuous vibration trend monitoring.

Q6: Is it compatible with PLC and DCS systems?
Yes, it directly interfaces with standard industrial analog input modules.

Q7: Does it provide waveform-level diagnostics?
No, it focuses on overall vibration amplitude rather than waveform analysis.

Q8: What does system length refer to?
It refers to the probe and extension cable assembly length, typically 5 m in this configuration.

Q9: Is it suitable for harsh environments?
Yes, it is designed for industrial environments with vibration, humidity, and temperature variation.

Q10: Is it widely used in predictive maintenance systems?
Yes, it is commonly used in condition-based monitoring systems for early fault detection.

Look forward to your comments!Comment