Bently Nevada 990 Vibration Transmitter

Bently Nevada 990 Vibration Transmitter

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The Bently Nevada 990 Vibration Transmitter is a compact, loop-powered device designed primarily for original equipment manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, and fans. It provides a simple and reliable 4–20 mA proportional vibration signal for direct integration into machinery control systems.

This 2-wire transmitter accepts input from Bently Nevada 3300 NSv proximity probes along with a matching extension cable (available in 5 m and 7 m system lengths). The device conditions the incoming signal into peak-to-peak vibration amplitude engineering units and outputs it as a standard 4–20 mA signal, enabling machinery protection, alarming, and control system integration.

The transmitter integrates a Proximitor sensor within the unit, eliminating the need for an external signal conditioning module. It also provides diagnostic outputs and adjustment features to simplify setup, calibration, and maintenance.

Features of Bently Nevada 990 Vibration Transmitter

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• Integrated Proximitor Sensor – No external signal conditioning unit required

• 4–20 mA Output Signal – Industry-standard output for control systems

• 2-Wire Loop-Powered Design – Simplifies installation and wiring

• Compatible with 3300 NSv Proximity Probe – Ideal for small clearance applications

• Non-Interacting Zero and Span Adjustments – External potentiometers for easy calibration

• PROX OUT Diagnostic Output – Provides vibration and gap voltage signal for monitoring

• Test Input Pin – Enables quick verification using a function generator

• Power-up Inhibit Circuit – Prevents false signals during startup

• Not OK / Signal Defeat Circuit – Avoids false alarms due to probe faults or loose connections

• Flexible Mounting Options – DIN rail clips or bulkhead mounting screws

• Potted Construction – Suitable for high humidity environments (up to 100% condensing)

Technical Specifications of Bently Nevada 990 Vibration Transmitter

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General

• Application: OEM machinery (compressors, pumps, motors, fans)

• Input: 1 non-contacting 3300 NSv proximity probe with extension cable

• System Length Options: 5 m and 7 m

Electrical

• Power Supply: +12 to +35 Vdc

• Output Signal: 4–20 mA

• Loop Accuracy: ±1.5% of full-scale range

• Maximum Loop Resistance: 1,000 Ω (including cable at 35 Vdc)

• Current Limiting: 23 mA typical

Signal & Measurement

• Probe Gap Range: 0.5 mm to 1.75 mm

• Frequency Response: 5 Hz to 6,000 Hz (+0, –3 dB)

• Minimum Target Size: 9.5 mm diameter

PROX OUT (Diagnostic Output)

• Output Impedance: 10 kΩ (calibrated for 10 MΩ load)

• Linear Range: 1.4 mm (starting approx. 0.25 mm from target)

• Scale Factor:7.87 mV/μm (200 mV/mil) ±6.5% typical
  ±10% worst case
  

• Typical Noise Level: 50 mV peak-to-peak

• Maximum Cable Length: 3 meters

Installation & Compatibility

• Mounting Options: DIN rail or bulkhead

• Construction: Potted for high humidity environments

• Compatibility: Designed for use with 3300 NSv proximity probe systems

Applications of Bently Nevada 990 Vibration Transmitter

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The Bently Nevada 990 Vibration Transmitter is widely used in OEM and industrial machinery, including:

• Centrifugal Air Compressors

• Small Pumps, Motors, and Fans

• Machinery Control Systems requiring 4–20 mA vibration input

Typical Use Cases

• Vibration monitoring for machinery protection

• Integration with PLC/DCS systems

• Condition monitoring in compact installations

Part Number of Bently Nevada 990 Vibration Transmitter

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Standard (Example) Part Number

990-04-50-01-00

This is a reference configuration for the Bently Nevada 990 Vibration Transmitter. It represents one commonly supplied setup and helps customers understand how the part number is structured.

Configurable Part Number Format

990-XX-XX-XX-XX

Each X / XX in the part number indicates a selectable option that can be customized based on your application requirements such as Approvals & Length.

Important: Final part number depends on the exact configuration needed for your machinery, environment, and monitoring system.

Why Buy Bently Nevada 990 Vibration Transmitter from ShopAED?

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• FREE delivery anywhere in UAE.

• Best online prices : Best online prices for Bently Nevada 990 Vibration Transmitter.

• Bulk Discount : ShopAED offers exclusive bulk pricing on Bently Nevada vibration monitoring and proximity sensor systems, making it ideal for large-scale industrial operations such as oil & gas plants, power generation facilities, petrochemical industries, and heavy manufacturing units.

• Fast Shipping : We ensure fast and reliable delivery of Bently Nevada products, minimizing downtime for your critical machinery. Our streamlined logistics network guarantees timely dispatch and accurate order fulfillment across the UAE and international markets.

• Lead Time : Standard lead time for Bently Nevada products is 3 to 4 weeks, depending on model and configuration. We coordinate closely with suppliers to ensure transparent timelines and timely delivery for your project requirements..

• Local presence : Locally registered business in Dubai UAE.

ShopAED is Supplier of Bently Nevada 990 Vibration Transmitter in Dubai (UAE), Saudi Arabia (KSA), Bahrain, Kuwait, Oman & Qatar

For over 15 years, ShopAED has been a trusted supplier of advanced Industrial and Medical Solutions, offering a comprehensive range of Test and Measuring Instruments for accurate diagnostics, calibration, and performance monitoring across industries such as oil & gas, manufacturing, and utilities, along with Automation Control Systems, Sensors, and Engine Parts to support efficient operations and maintenance, in addition, we specialize in AED Defibrillators with a complete range of AED Accessories, Battery, Pads, AED Trainers, and CPR Manikins for emergency preparedness and life-saving training, complemented by essential safety equipment including Respirators, Goggles, Helmets, Earmuffs, Single and Multi Gas Detectors to ensure reliable protection and compliance in demanding work environments.

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