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- Bently Nevada
- 990 and 991 Transmitter
- 990-04-70-01-05
In Stock
Ships by Sunday, August 16
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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 990-04-70-01-05
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Product Model990-04-70-01-05
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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 Size10x7.5x5.6cm
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ManufacturerBently Nevada
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Weight0.5 kg
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Full-scale Option0-4 mils pp (0-100 μm pp)
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System Length Option7.0 meters (23.0 feet)
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Mounting Option35 mm DIN rail clips
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Agency Approval OptionCSA Division 2, ATEX Zone 0, ATEXZone 2 and includes ABSmaritime approval
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Power Supply12–30 VDC loop power
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Maximum Loop Resistance43.5 × (VPS − 12) Ω
Description
The BENTLY NEVADA 990-04-70-01-05 990 Vibration Transmitter is a two-wire, loop-powered vibration monitoring device for use with compatible 3300 NSv proximity probes and matching extension cables. It is commonly used on centrifugal air compressors, small pumps, motors, fans, and other rotating machinery where a continuous proportional vibration signal is required for connection to a PLC, DCS, SCADA, or machinery control system.
The transmitter receives the proximity probe signal and processes the measured shaft vibration into a proportional 4–20 mA output. The 990-04 configuration provides a full-scale measurement range of 0–4 mils peak-to-peak, equivalent to 0–100 μm peak-to-peak. This allows the connected control or monitoring system to receive a standardized analog signal representing the measured vibration amplitude.
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 receives the proximity probe signal and processes the measured shaft vibration into a proportional 4–20 mA output. The 990-04 configuration provides a full-scale measurement range of 0–4 mils peak-to-peak, equivalent to 0–100 μm peak-to-peak. This allows the connected control or monitoring system to receive a standardized analog signal representing the measured vibration amplitude.
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).
Information
Overview
Manuals
Application Notes
Product Applications
Electrical Connections & Wiring
Features:
- Integrated Proximitor Sensor
- 4 to 20 mA Proportional Vibration Signal Output
- Non-Isolated PROX OUT and COM Terminals
- Non-Interacting Zero and Span Potentiometers
- Test Input Pin for Loop Verification
The 990-04-70-01-05 is a two-wire, loop-powered device that accepts input from the 3300 NSv proximity probe and its matching extension cable. The 990-04-70-01-05 is available with 5 m and 7 m system length options. The 990-04-70-01-05 conditions the signal into appropriate peak-to-peak vibration amplitude engineering units and provides this value as a proportional 4 to 20 mA industry-standard signal.
The 990-04-70-01-05 Bently Nevada 990 Vibration Transmitter may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-04-70-01-05 990 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.
The 990-04-70-01-05 features an integrated Proximitor Sensor that requires no external unit. The 990-04-70-01-05 provides non-isolated "PROX OUT" and "COM" terminals plus a coaxial connector to provide a dynamic vibration and gap voltage signal output for diagnostics. The "PROX OUT" coaxial connector on the 990-04-70-01-05 provides a non-isolated dynamic transducer signal for machinery diagnostics that can be connected directly to battery-powered or isolated test equipment.
The 990-04-70-01-05 includes non-interacting zero and span potentiometers under the transmitter label that support loop adjustment. The 990-04-70-01-05 also features a Test Input pin for quick verification of loop signal output using a function generator as the input.
The 990-04-70-01-05 incorporates a Not OK/Signal Defeat circuit that prevents high outputs or false alarms due to a faulty proximity probe or loose connection. The 990-04-70-01-05 is compatible with the 3300 NSv proximity probe, allowing transducer installation in small areas with minimal clearance typical of centrifugal air compressors.
- Oil/Gas Refineries: Mounted on compressors, pumps, and turbomachinery handling volatile fluids
- Power Generation: Protects probes on steam/gas turbines and generators
- Chemical/Petrochemical: Ensures sensor reliability on mixers, expanders, and blowers in corrosive/explosive environments
- Water/Wastewater: Used on large-scale distribution pumps and aeration blowers
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 & 4-20 mA Loop: Connect standard twisted-pair shielded cable to the transmitter's + (Plus) and – (Minus / COM) terminals. The loop requires a +12 to +35 Vdc input.
Grounding: To prevent ground loop interference, ensure the cable shield is grounded at a single point, usually at the control system or monitoring cabinet.
Diagnostics (PROX OUT): For temporary field diagnostics or System 1 setups, use the front-facing BNC connector or the hardwired PROX OUT and COM terminals.
This connection provides a non-isolated dynamic transducer signal.
Alternative Names
990-04-70-01-O5
990-04-70-0I-05
990-04-70-O1-05
990-04-7O-01-05
990-O4-70-01-05
99O-04-70-01-05
990 04 70 01 05
990 04 70 01 O5
990 04 70 0I 05
990 04 70 O1 05
990 04 7O 01 05
990 O4 70 01 05
99O 04 70 01 05
990-04-70-01-01
990-04-70-01-00
Technical notes
The 990 Vibration Transmitter incorporates an integrated Proximitor Sensor, eliminating the need for a separate external Proximitor Sensor for the transmitter system. In addition to the primary 4–20 mA vibration output, the unit provides non-isolated PROX OUT and COM terminals together with a coaxial connection for dynamic vibration and gap-voltage signals used for diagnostic purposes.
FAQs
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What is the required input power for this transmitter?
+The transmitter requires a loop-powered input of +12 to +35 Vdc at the transmitter terminal. -
What type of probe is compatible with this model?
+It is designed to be compatible only with 3300 NSv (Non-Standard velocity) proximity probes and extension cables. -
What happens if the proximity probe fails or gets disconnected?
+The transmitter features a "Not OK/Signal Defeat" circuit. This detects faulty proximity probes or loose connections, preventing the unit from outputting falsely high signals or triggering false alarms in your control system -
Does it offer dynamic signal outputs for advanced diagnostics?
+Yes, it features a non-isolated PROX OUT terminal, a COM terminal, and an onboard coaxial connector. These connection points provide raw, dynamic vibration signals and gap voltages to field technicians connecting portable data collectors or machinery analyzers.
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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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