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990-04-70-01-00 Bently Nevada 990 Vibration Transmitter

990-04-70-01-00 Bently Nevada 990 Vibration Transmitter

Product Description

The Bently Nevada 990-04-70-01-00 is a high-precision, loop-powered vibration transmitter designed for continuous machinery protection. Unlike traditional rack-based monitoring systems, this standalone module integrates the proximity probe driver and signal...

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SKU: 990-04-70-01-00
Vendor: Bently Nevada
Category: Vibration Transmitter
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Product Description

The Bently Nevada 990-04-70-01-00 is a high-precision, loop-powered vibration transmitter designed for continuous machinery protection. Unlike traditional rack-based monitoring systems, this standalone module integrates the proximity probe driver and signal conditioner into a single compact unit. It interfaces directly with Distributed Control Systems (DCS) or Programmable Logic Controllers (PLC), providing a standardized 4–20 mA output proportional to the radial vibration or axial thrust of a rotating shaft.

The transmitter utilizes 3300 NSv proximity transducers, making it ideal for monitoring small-diameter shafts or installations with restricted mounting clearances. Its 2-wire configuration simplifies wiring, reducing installation costs in environments such as cooling towers, pumps, and fans.

Detailed Technical Specifications

Specification Details
Model Designation 990-04-70-01-00
Series 990 Vibration Transmitter
Output Signal 4–20 mA DC (Proportional to Vibration)
Supply Voltage 12–35 VDC (Loop-powered)
Full-Scale Range 0–200 µm (0–8 mils) peak-to-peak or 0–125 µm (0–5 mils)
System Compatibility Optimized for 3300 NSv Proximity Transducers
Connector Type 70 cm (0.7m) integrated cable with coaxial connector
Mounting Options 35 mm DIN rail or bulkhead mounting
Physical Housing Polyphenylene Sulfide (PPS) for chemical resistance
Dimensions 7.6 cm x 10.2 cm x 6.3 cm
Weight 0.5 kg 

Application & Installation FAQ

How does this module handle sensor gaps?

The 990-04-70-01-00 provides a separate "Prox Out" BNC connector or terminal. This allows technicians to measure the gap voltage directly with a voltmeter during initial sensor calibration without interrupting the 4–20 mA loop.

What is the primary benefit of the 04-70-01-00 configuration?

The 04-70-01-00 configuration indicates a 70 cm cable length and specific mounting bracket options. These are typically required for standard industrial enclosures where space-saving and vibration-resistant wiring are essential.