990-04-50-01-CN | Bently Nevada 3300 NSv 2-Wire Vibration Transmitter

Product Overview

The Bently Nevada 990-04-50-01-CN serves as a specialized 2-wire vibration transmitter designed for small-bore machinery and confined installation spaces. It integrates the driver and signal conditioning electronics into a single module, converting radial vibration data into a proportional 4-20 mA current loop output. This model specifically supports the 3300 NSv proximity probe series, providing high-resolution monitoring for shafts where standard 8mm probes cannot fit. We supply this unit as 100% Brand New and Original, featuring the "CN" regional designation for full compliance with local industrial standards.

Part Number Breakdown

The 990-04-50-01-CN utilizes a specific coding structure to define its measurement scale and regional certifications:

Technical Specifications

This transmitter delivers precise machinery protection data through the following parameters:

• Input Compatibility: Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.

• Measurement Range: 0 to 100 μm (peak-to-peak).

• System Length: 5.0 meters (16.4 feet).

• Output Signal: 4-20 mA DC loop current.

• Mounting: Integrated 35 mm DIN rail clips.

• Hazardous Area Ratings: ATEX/IECEx and Chinese NEPSI marking.

• Design: 2-wire, loop-powered architecture.

Engineering Advantages

The 990-04-50-01-CN targets specific technical hurdles in modern plant automation:

• Small-Shaft Precision: The NSv technology enables accurate vibration measurement on shafts as small as 50 mm (2 inches). It reduces "side-view" interference, allowing the sensor to operate in tight mechanical housings where standard probes experience signal distortion.

• Streamlined Control Integration: By outputting a direct 4-20 mA signal, this unit bypasses the need for external Proximitor sensors and rack-mounted monitors. You connect the transmitter directly to your PLC or DCS analog input card, reducing total system cost.

• Regional Compliance (NEPSI): The "CN" variant carries the NEPSI hazardous area marking. This ensures the unit meets all regulatory requirements for installation in explosive atmospheres within the Chinese industrial sector, simplifying safety audits and insurance compliance.

• Rapid Installation: The factory-installed 35 mm DIN rail clips facilitate instant mounting in standard electrical cabinets. The 2-wire loop-powered design further reduces labor by eliminating independent power supply wiring to each transmitter.

FAQs

Can I use this transmitter with a standard 3300 XL 8mm probe?

No. This transmitter specifically requires a 3300 NSv Proximity Probe. The 990-04 series is calibrated for the unique electrical characteristics of the NSv probe tip. Connecting a standard 3300 XL probe will result in significant measurement errors.

What is the benefit of the 0 to 100 μm range?

The 100 μm range provides high sensitivity for precision machinery where even small amounts of vibration indicate a critical fault. This metric range (μm) is standard for many European and Asian rotating equipment specifications.

How do I confirm the unit is brand new?

Each unit arrives in original Bently Nevada factory packaging with an undisturbed seal. The "CN" marking and serial number allow for full traceability through the manufacturer's quality management system, guaranteeing you receive an authentic, unused component.

Does this unit require a separate power supply?

This is a loop-powered device. It draws operating power directly from the 4-20 mA signal loop (typically +24 Vdc). You do not need to run separate power cables, which simplifies field junction box layouts.