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    Apter Power delivers genuine Bently Nevada vibration transmitters to ensure accurate machinery condition monitoring and direct DCS/PLC loop integration.

990-04-70-03-00

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The 990-04-70-03-00 Vibration Transmitter is a high-precision, two-wire, loop-powered device specifically engineered to simplify machinery monitoring by converting complex vibration signals into a standard 4 to 20 mA proportional output.
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Technical specifications for 990-04-70-03-00

  • Manufacturer:
    Bently Nevada
  • Part Number:
    990-04-70-03-00
  • Product Family:
    990 Vibration Transmitter
  • Product Type:
    Vibration Transmitter
  • Stock:
    1
  • Full-scale Option:
    0-4 mils pp (0-100 μm pp)
  • System Length:
    7.0 meters (23.0 feet)
  • Mounting Option:
    DIN clips and screws
  • Agency Approval:
    Not required
  • Output Signal:
    4–20 mA (proportional output)
  • Signal Units:
    Peak-to-Peak vibration amplitude
  • Frequency response:
    5 Hz to 6,000 Hz +0, 3 dB.
  • Minimum target size:
    9.5 mm (0.375 in) diameter.
  • Weight:
    0.44 kg
  • Estimated shipping dimensions:
    10x7.3x6cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Applications Diagnostics & Protection Certifications & Standards

Features:

  • Links the 3300 NSv Proximity Probe to the Machinery Control System via 4 to 20 mA Output
  • Integrates Proximity Sensing with Signal Conditioning for Peak-to-Peak Vibration Measurement
  • Functions with the 3300 NSv Probe and Matching Extension Cable in 5 m and 7 m System Lengths
The Bently Nevada 990-04-70-03-00 Vibration Transmitter functions as a two-wire, loop-powered device designed primarily for original equipment manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, and fans. The 990-04-70-03-00 continuously accepts input from the 3300 NSv proximity probe and its matching extension cable, conditions the signal into appropriate 0-4 mils pp (0-100 μm pp) peak-to-peak vibration amplitude engineering units, and delivers this value as a proportional 4 to 20 mA industry-standard signal to the control system where machinery protection alarming and logic occur. Seamless signal transmission is standard with the 990-04-70-03-00, and its potted construction ensures reliable operation in high-humidity environments up to 100% condensing conditions. The 990-04-70-03-00 has incorporated compatibility with the 3300 NSv proximity probe, allowing transducer installation in small areas with minimal clearance typical of centrifugal air compressor applications.

The 990-04-70-03-00 provides essential vibration monitoring functions critical to machinery protection, and is a vital component of the monitoring path, directly affecting the proper, normal operation of the overall control system. One 990-04-70-03-00 transmitter is required per measurement point depending on the desired monitoring coverage. The 990-04-70-03-00 occupies minimal mounting space and offers flexible installation through DIN clips and screws as standard mounting options.

For diagnostic applications, the 990-04-70-03-00 includes non-isolated PROX OUT and COM terminals plus a coaxial connector to provide dynamic vibration and gap voltage signal output for troubleshooting purposes. In addition to standard signal transmission, the diagnostic configuration also supports non-interacting zero and span potentiometers under the transmitter label for loop adjustment. The 990-04-70-03-00 enables signal verification using the Test Input pin, which allows quick validation of loop signal output using a function generator as the input. Using this method, the 990-04-70-03-00 continually monitors the health of the proximity probe connection. If the system detects that the probe is no longer providing stable output due to a faulty connection or loose wiring, the Not OK/Signal Defeat circuit will automatically prevent high outputs or false alarms and ensure the control system receives valid vibration data.

The 990-04-70-03-00 Bently Nevada Vibration Transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-04-70-03-00 Vibration Transmitter Manuals,Datasheets,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.
Bently Nevada 990-04-70-03-00 Vibration Transmitter Specs

General

  • Manufacturer Bently Nevada
  • Model 990-04-70-03-00
  • Condition New Original ready stock
  • Product Family 990-04-70-03-01,990-04-70-03-05
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.
  • Target Machinery: Centrifugal air compressors, small pumps, motors, and fans.
  • Industries: Extensively used in oil and gas, petrochemical, wastewater, and general industrial automation.
  • Use Case: Ideal for sites where full continuous monitoring systems are not practical but overall vibration trending is necessary.
  • Dynamic Output: Includes a coaxial connector and terminals for a "PROX OUT" signal, providing raw dynamic vibration and gap voltage data for specialized portable diagnostic tools.
  • "Not OK" Circuitry: A built-in circuit helps prevent false alarms by detecting faulty proximity probes or loose connections.
  • Verification: A "Test Input" pin allows for quick loop signal verification using a function generator.
  • Limitations: It does not capture dynamic signals automatically during an alarm and cannot be used for complex diagnostic systems like System 1.
  • Hazardous Areas: Options are available for ATEX/IECEx and CSA/NRTL/C certifications for flammable atmospheres, though this specific "00" variant does not include them.
  • Environmental Standards: Complies with FCC Part 15 for interference and IEC 60068-2-30 for humidity resistance.
  • Electromagnetic Compatibility: Certified to EN 61000-4-5 for surge protection.
Description
The 990-04-70-03-00 Vibration Transmitter is a two-wire, loop-powered device specifically engineered for original equipment manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, and fans. The 990-04-70-03-00 is designed for applications where a straightforward 4 to 20 mA proportional vibration signal is required as the input to machinery control systems. This makes the 990-04-70-03-00 an ideal choice for environments where machinery protection alarming and control logic depend on reliable, real-time vibration monitoring.

The 990-04-70-03-00 accepts input from the 3300 NSv proximity probe and its matching extension cable, with a system length of 7.0 meters (23.0 feet). The 990-04-70-03-00 conditions the incoming signal into appropriate peak-to-peak vibration amplitude engineering units, delivering this value as a proportional 4 to 20 mA industry-standard signal to the control system. The full-scale option for the 990-04-70-03-00 is 0-4 mils pp (0-100 μm pp), ensuring precise measurement within the specified range.

The 990-04-70-03-00 incorporates several notable features that enhance its functionality and ease of use. The 990-04-70-03-00 includes an integrated Proximitor Sensor, eliminating the need for any external unit. Non-isolated PROX OUT and COM terminals, along with a coaxial connector, are provided on the 990-04-70-03-00 to deliver dynamic vibration and gap voltage signal outputs for diagnostic purposes. Non-interacting zero and span potentiometers located under the transmitter label on the 990-04-70-03-00 support convenient loop adjustment. A Test Input pin on the 990-04-70-03-00 enables quick verification of loop signal output using a function generator as the input source.

For safety and reliability, the 990-04-70-03-00 is equipped with a Not OK/Signal Defeat circuit that prevents high outputs or false alarms caused by a faulty proximity probe or loose connection. The 990-04-70-03-00 offers flexible mounting options, including DIN clips and screws, which simplifies installation in various industrial settings. The potted construction of the 990-04-70-03-00 ensures reliable operation in high-humidity environments, even up to 100% condensing conditions. Additionally, the compatibility of the 990-04-70-03-00 with the 3300 NSv proximity probe allows transducer installation in small areas with minimal clearance, a typical requirement in centrifugal air compressor applications. No agency approval is required for the 990-04-70-03-00.

Alternative Names
990-04-70-03-01 990-04-70-03-05 990-04-50-03-00 990-04-70-01-00 990-04-70-02-00
Technical notes
For diagnostics, the 990-04-70-03-00 provides non-isolated PROX OUT and COM terminals, along with a coaxial connector for real-time dynamic vibration and gap voltage analysis. Additionally, the 990-04-70-03-00 features non-interacting zero and span potentiometers for easy loop adjustment and a "Not OK/Signal Defeat" circuit to prevent false alarms caused by faulty probes or loose connections.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which industries or applications commonly use the 990-04-70-03-00?
The 990-04-70-03-00 is primarily designed for OEM applications involving centrifugal air compressors, small pumps, electric motors, and industrial fans.
What problem does the 990-04-70-03-00 solve in machinery monitoring systems?
The transmitter simplifies vibration monitoring by converting signals from a 3300 NSv proximity probe into a standard 4–20 mA current loop signal. This allows standard PLCs and DCS systems to process vibration data without requiring specialized proximity monitoring hardware.
Does the 990-04-70-03-00 require an external Proximitor Sensor?
No. The integrated design of the 990-04-70-03-00 eliminates the need for an external Proximitor Sensor, reducing installation complexity and saving cabinet space.
Is the 990-04-70-03-00 suitable for harsh industrial environments?
Yes. The transmitter features a fully potted construction, making it highly resistant to moisture and suitable for environments with up to 100% condensing humidity.