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- Bently Nevada
- 990 and 991 Transmitter
- 990-04-70-01-00
In Stock
Ships by Wednesday, September 2
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· Product image is representative; revision or series may vary. Contact us to request a specific version.
We provide 1 year warranty for all remaining parts.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online.
If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.
Amikon offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
Technical specifications for 990-04-70-01-00
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Product Model990-04-70-01-00
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Product Parameters990 Vibration Transmitter
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Tariff Code8537101190
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Country of originUSA
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Place of shipmentXiamen, China
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In stock1 unit
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Estimated Shipping Size10x7.4x6cm
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ManufacturerBently Nevada
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Weight0.45 kg
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Power Requires+12 to +35 Vdc input atthe transmitter terminal
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Current limiting23 mA typical
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Zero and spanNon-interacting externaladjustments
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Probe Cable75Ω coaxial, fluoroethylenepropylene (FEP) insulated
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Frequencyresponse5 Hz to 6,000 Hz +0, 3 dB
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Minimumtarget size9.5 mm (0.375 in) diameter
Description
The 990-04-70-01-00 is a Vibration Transmitter manufactured by Bently Nevada for machinery condition monitoring applications. The 990-04-70-01-00 is intended primarily for the original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, or fans who prefer to provide a simple 4 to 20 mA proportional vibration signal as the input to their machinery control system. The 990-04-70-01-00 is a two-wire, loop-powered device that accepts input from Bently Nevada's 3300 NSv proximity probe and its matching extension cable.
The 990 Vibration Transmitter is intended primarily for theoriginal equipment manufacturers (OEMs) of centrifugal aircompressors or small pumps, motors, or fans who prefer toprovide a simple 4 to 20 mA proportional vibration signal asthe input to their machinery control system.The transmitter is a two-wire, loop-powered device thataccepts input from our 3300 NSv proximity probe and itsmatching extension cable (available in 5 m and 7 m systemlength options).
The transmitter conditions the signal into appropriate peakto-peak vibration amplitude engineering units, and providesthis value as a proportional 4 to 20 mA industry-standardsignal as the input to the control system where machineryprotection alarming and logic occurs.
The 990 Vibration Transmitter is intended primarily for theoriginal equipment manufacturers (OEMs) of centrifugal aircompressors or small pumps, motors, or fans who prefer toprovide a simple 4 to 20 mA proportional vibration signal asthe input to their machinery control system.The transmitter is a two-wire, loop-powered device thataccepts input from our 3300 NSv proximity probe and itsmatching extension cable (available in 5 m and 7 m systemlength options).
The transmitter conditions the signal into appropriate peakto-peak vibration amplitude engineering units, and providesthis value as a proportional 4 to 20 mA industry-standardsignal as the input to the control system where machineryprotection alarming and logic occurs.
Information
Overview
Manuals
Application Notes
Product Applications
Electrical Connections
Features:
- Integrated Proximitor Sensor with No External Unit Required
- 4 to 20 mA Proportional Vibration Signal Output
- Non-isolated "PROX OUT" and Coaxial Connector for Diagnostics
- Non-interacting Zero and Span Potentiometers
The 4–20 mA output is generated in a 2-wire loop-powered configuration, requiring +12 to +35 V DC at the transmitter terminal. Maximum loop resistance is 1,000 Ω at 35 V DC. Loop accuracy is within ±1.5 % over the specified full-scale range. The frequency response spans 5 Hz to 6,000 Hz (+0, –3 dB). Current limiting is set at 23 mA typical.
The 990-04-70-01-00 Bently Nevada Vibration Transmitter may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-04-70-01-00 Vibration Transmitter Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
A Not OK / Signal Defeat circuit is built into the transmitter. If a proximity probe fault or loose connection occurs, the output drops below 3.6 mA within 100 microseconds, preventing false high outputs in the control system. Normal operation automatically resumes 2–3 seconds after the fault condition clears. At power-up, the output is held below 3.6 mA for approximately 2 seconds to inhibit false alarms during initialization.
Non-isolated Proximitor sensor output is available with an output impedance of 50 Ω, a linear range of 1.4 mm (55 mils) beginning at approximately 0.25 mm from the target surface, and an incremental scale factor of 7.87 mV/μm (200 mV/mil) ±6.5 %. Temperature stability is within ±0.05 %/°C of full scale.
Zero and span adjustments are accessible under the transmitter label via non-interacting potentiometers, simplifying field calibration. A test input pin allows loop signal verification without removing the transmitter from service.
- Oil/Gas (Downstream): Monitors auxiliary pumps, cooling fans, and lube skid pumps in non-hazardous refinery areas
- Chemical/Petrochemical: Monitors transfer pumps and agitators to prevent seal breaches from misalignment
- Power Generation: Tracks shaft motion on smaller steam/hydro turbines and boiler feed pumps
- Water/Wastewater: Prevents bearing failure on high-volume pumps, blowers, and aerators
- Manufacturing/HVAC: Oversees plant-air centrifugal compressors for automation lines
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Power Supply: The transmitter requires a DC power supply of +12 V to +35 V DC at the terminal.
Signal/Power Wiring: Connect your twisted, shielded pair cable to the transmitter's power terminals. Connect the positive (+) and negative (-) lines to the corresponding terminals in the control loop.
Probe Connection: Connect the coaxial cable from the proximity probe directly to the coaxial input connector on the transmitter.
Grounding: Proper grounding of the cable shield is required to prevent electrical noise from interfering with the vibration signal.
Alternative Names
990-04-70-01-OO
990-04-70-0I-00
990-04-70-O1-00
990-04-7O-01-00
990-O4-70-01-00
99O-04-70-01-00
990 04 70 01 00
990 04 70 01 OO
990 04 70 0I 00
990 04 70 O1 00
990 04 7O 01 00
990 O4 70 01 00
99O 04 70 01 00
Technical notes
The 990-04-70-01-00 complies with multiple regulatory standards including FCC Part 15, EN 61000-6-2 and EN 61000-6-4 EMC Directive 2014/30/EU, ATEX Directive 2014/34/EU, RoHS Directive 2011/65/EU, and ABS 2009 Steel Vessels Rules for maritime applications. The 990-04-70-01-00 carries hazardous area approvals including cNRTLus Class I, Division 2, Groups A, B, C, D, T5 at ambient temperature up to +85°C, and ATEX/IECEx Zone 2 certifications.
FAQs
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What probes can be used with this transmitter?
+The 990 transmitter is specifically designed for use with the 3300 NSv proximity probe. This compatibility allows for transducer installation in small areas with minimal clearance -
Does it require an external Proximitor Sensor?
+No. It features an integrated Proximitor Sensor, eliminating the need for an external unit. -
What happens if the probe fails or becomes disconnected?
+The transmitter contains a -
Which proximity probe is compatible with this unit?
+The transmitter is purpose-built to accept input from a non-contacting Bently Nevada 3300 NSv proximity probe and its matching extension cable. It must not be mixed with other standard 5mm or 8mm probe systems.
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Disclaimer: Amikon Limited sells new and surplus products and develops channels for purchasing such products. Amikon Limited is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Amikon Limited is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. Amikon Limited is not an authorized distributor, dealer, or representative of the products displayed on this website. All product names, trademarks, brands, and logos used on this website are the property of their respective owners. The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.
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