Introduction

The Bently Nevada 990-05-XX-03 is a loop-powered vibration transmitter engineered for reliable condition monitoring of industrial rotating machinery. It converts mechanical vibration signals into a standardized 4–20 mA output for seamless integration into automation and protection systems.

Its compact integrated architecture eliminates external signal conditioning requirements, reducing installation complexity while maintaining stable and accurate vibration measurement performance. This model is widely used in OEM applications where reliability, standardized output, and efficient installation are essential.

Technical Specifications

Parameter	Specification
Product Model	990-05-XX-03
Full-scale Range	0–5 mils pp (0–125 μm pp)
System Length	5 m or 7 m (configuration dependent)
Mounting Type	DIN clip / screw mounting variant
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
Housing Material	Industrial-grade metal enclosure
Dimensions	100.1 × 73.9 × 53.3 mm
Weight	0.43 kg (0.95 lb)

Applications

The Bently Nevada 990-05-XX-03 Vibration Transmitter is designed for continuous vibration monitoring of rotating machinery in industrial automation systems where stable signal output, compact installation, and long-term operational reliability are required.

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 equipment
Marine and offshore mechanical systems

It is widely used in OEM machinery installations requiring standardized 4–20 mA output for direct integration into PLC and DCS control systems.

Advantages

Integrated vibration sensing and signal conditioning in a compact loop-powered design
Direct 4–20 mA output for simplified automation integration
Reduced wiring complexity and lower installation cost
Stable long-term signal performance for continuous monitoring applications
Strong immunity to industrial electromagnetic interference (EMI)
OEM-optimized configuration for space-constrained equipment layouts
Supports predictive maintenance and condition-based monitoring strategies
Proven reliability in harsh industrial operating environments

Technical FAQs

Q1: What does the “03” suffix represent in this model?
It generally indicates a mounting and configuration variant within the 990 transmitter series, typically associated with DIN clip/screw hybrid installation options depending on OEM build definition.

Q2: What does “XX” mean in the model number?
It represents configurable system length options, commonly 5 m or 7 m probe/cable assemblies depending on the selected configuration.

Q3: What output signal does this transmitter provide?
It provides a 4–20 mA analog output proportional to vibration amplitude.

Q4: What does the “05” represent?
It indicates a 0–5 mils peak-to-peak full-scale vibration range.

Q5: Does it require external signal conditioning?
No, signal conditioning is fully integrated within the transmitter.

Q6: What equipment is it typically used on?
It is used on pumps, compressors, motors, fans, and other rotating machinery.

Q7: Can it operate in continuous monitoring mode?
Yes, it is designed for continuous vibration trend monitoring.

Q8: Is it compatible with PLC and DCS systems?
Yes, it directly interfaces with standard industrial control system analog inputs.

Q9: Does it support waveform diagnostics?
No, it focuses on overall vibration amplitude rather than waveform-level analysis.

Q10: Is it suitable for harsh environments?
Yes, it is designed for vibration, humidity, and temperature variation conditions in industrial environments.

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