Product Overview
Integrated Monitoring for Critical Rotating Equipment
The 990-04-70-01-007 accepts input from a compatible 3300 NSv proximity probe and matching extension cable, converting shaft vibration into a standard 4–20 mA analog output. In addition to the process signal, it provides a dynamic vibration output for diagnostics, allowing maintenance personnel to perform detailed vibration analysis without interrupting normal operation.
Its potted industrial design offers excellent resistance to moisture, vibration, and harsh operating environments, making it ideal for continuous machine condition monitoring.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 990-04-70-01-007 |
| Product Type | 990 Vibration Transmitter |
| Measurement Range | 0–4 mils pp (0–100 μm pp) |
| Output Signal | 4–20 mA, Two-Wire Loop Powered |
| Compatible Probe | 3300 NSv Proximity Probe |
| Compatible System Length | 7 m |
| Mounting Option | 35 mm DIN Rail |
| Diagnostic Output | Dynamic Proximitor® Output |
| Power Supply | +12 to +35 VDC |
| Operating Temperature | -35°C to +85°C |
| Housing | Fully Potted Industrial Construction |
| Humidity Rating | Up to 100% Condensing |
| Approximate Dimensions | 120 × 80 × 55 mm |
| Approximate Weight | 0.54 kg |
Typical Industrial Applications
The 990-04-70-01-007 is widely deployed for continuous vibration monitoring in rotating equipment.
| Industry | Typical Equipment |
|---|
| Power Generation | Steam turbines, generators |
| Oil & Gas | Compressors, centrifugal pumps |
| Petrochemical | Process pumps and compressors |
| Water Treatment | High-speed pumps |
| Manufacturing | Motors, fans, blowers |
Typical monitoring functions include:
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Shaft vibration monitoring
-
Machinery protection
-
PLC and DCS vibration input
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Predictive maintenance
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Continuous equipment health monitoring
-
OEM machinery packages
Performance Highlights
Integrated Proximitor® Electronics
The transmitter incorporates Proximitor® signal conditioning internally, eliminating the need for a separate external module and reducing installation complexity.
Standard 4–20 mA Output
The industry-standard analog output allows direct connection to plant automation systems, enabling continuous vibration trending and alarm management.
Diagnostic Signal Access
Dedicated dynamic output terminals provide access to raw vibration and gap voltage signals, allowing advanced troubleshooting and vibration analysis without interrupting the control signal.
Rugged Environmental Design
The fully potted construction withstands high humidity, vibration, and industrial contaminants, supporting reliable long-term operation in harsh process environments.
Flexible Installation
The supplied 35 mm DIN rail mounting option enables quick panel installation while minimizing cabinet space requirements.
Technical FAQs
1. What is the Bently Nevada 990-04-70-01-007 used for?
It converts shaft vibration measured by a compatible proximity probe into a standard 4–20 mA signal for industrial control and monitoring systems.
2. What does the "04" option represent?
It specifies a 0–4 mils peak-to-peak (0–100 μm pp) vibration measurement range.
3. What does the "70" option indicate?
It identifies compatibility with a 7-meter transducer system consisting of the probe and extension cable.
4. What does the "01" mounting option specify?
It indicates 35 mm DIN rail mounting for control cabinet installation.
5. Which probe is compatible?
The transmitter is designed for use with a 3300 NSv proximity probe and matching extension cable.
6. What power supply is required?
The transmitter operates from a +12 to +35 VDC loop-powered supply.
7. Can it be connected directly to a PLC?
Yes. The 4–20 mA output is intended for direct connection to PLC, DCS, SCADA, and similar control systems.
8. Does it provide a raw vibration signal?
Yes. Dynamic vibration and gap voltage outputs are available for diagnostic testing and vibration analysis.
9. Is the transmitter suitable for humid environments?
Yes. Its potted construction supports operation in environments with up to 100% condensing humidity.
10. Which machines commonly use this transmitter?
It is commonly installed on centrifugal compressors, pumps, motors, fans, and other rotating machinery requiring continuous vibration monitoring.
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