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    Apter Power provides genuine Bently Nevada transmitters to ensure precise shaft vibration monitoring and seamless PLC loop integration for industrial rotating machinery.

990-04-70-01-00

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Bently Nevada 990-04-70-01-00 is a 4–20 mA proportional vibration transmitter with integrated Proximitor sensor, DIN rail mounting, Not OK/Signal Defeat protection, and diagnostic output.
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Technical specifications for 990-04-70-01-00

  • Manufacturer:
    Bently Nevada
  • Part Number:
    990-04-70-01-00
  • Product Family:
    990 Vibration Transmitter
  • Product Type:
    Vibration Transmitter
  • Stock:
    1
  • Full-scale Option:
    04=0-4 mils pp (0-100 μm pp)
  • System Length Option:
    70=7.0 meters (23.0 feet)
  • Mounting Option:
    01=35 mm DIN rail clips
  • Agency Approval Option:
    00= Not required
  • NOT OK/signal defeat:
    Signal drops below 3.6 mA within 100 µs on a Not OK condition and recovers within 2–3 s after clearance
  • Temperature stability:
    Incremental scale factor remains within ±10% of 7.87 mV/µm (200 mV/mil) from 0°C to +70°C (+32°F to +158°F)
  • 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 Use Cases Installation & Integration Operating Environment

Features:

  • Interface Between the Proximity Transducer System and Machinery Control Systems
  • Combines Capability of Signal Conditioning with Dynamic Diagnostic Outputs
  • Operates in Conjunction with the 3300 NSv Proximity Probe and Matching Cable
The Bently Nevada 990-04-70-01-00 Vibration Transmitter operates as a loop-powered device in industrial setups, providing a reliable 4 to 20 mA proportional vibration signal to the control system. It continuously converts raw input from a matching transducer system to peak-to-peak vibration amplitude engineering units and distributes this industry-standard signal to support machinery protection alarming and logic. Seamless loop adjustment is standard with the Bently Nevada 990-04-70-01-00 Vibration Transmitter, however using its integrated non-interacting zero and span potentiometers will allow precise loop calibration beneath the label. The Bently Nevada 990-04-70-01-00 Vibration Transmitter has made improvements in several areas over multi-component setups by incorporating an integrated Proximitor Sensor that eliminates the need for an external unit.

The Bently Nevada 990-04-70-01-00 Vibration Transmitter provides essential monitoring functions common to machinery protection, and is a critical component of the diagnostic path, directly affecting the proper, normal operation of the overall monitoring system. A two-wire connection is required per loop depending on the desired measurement channel. The Bently Nevada 990-04-70-01-00 Vibration Transmitter occupies a small footprint near the machinery and is easily installed using standard DIN-rail clips or bulkhead mounting screws (the standard mounting options).

For harsh environment applications, the monitoring system requires a robust Bently Nevada 990-04-70-01-00 Vibration Transmitter module enclosed in potted construction. In addition to standard signal conditioning operation, the transmitter configuration also performs automatic signal protection. The Bently Nevada 990-04-70-01-00 Vibration Transmitter monitoring configuration executes protection using the internal Not OK/Signal Defeat circuitry. Using this method, the transmitter system continually monitors the health of the connection.

The 990-04-70-01-00 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 990-04-70-01-00 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 990-04-70-01-00 Vibration Transmitter Specs

General

  • Manufacturer Bently Nevada
  • Model 990-04-70-01-00
  • Condition New Original ready stock
  • Product Family 990-04-70-01-01,990-04-70-01-05
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: Primarily designed to monitor shaft vibration in centrifugal air compressors, small pumps, electric motors, cooling fans, and small turbines.
  • Cost-Effective Trending: Ideal for Original Equipment Manufacturers (OEMs) and plants requiring continuous vibration monitoring on non-critical machinery without the high cost of a dedicated protection system.
  • Tight Mechanical Clearance: Specially matched with the 3300 NSv (Narrow Side View) proximity probe, making it ideal for machines with limited space or tight installation constraints.
  • Dynamic Diagnostics: Features a non-isolated "PROX OUT" coaxial terminal, allowing field technicians to temporarily connect portable data collectors to analyze raw, dynamic vibration signals for machinery troubleshooting.
  • Sensor Interface: Connects to one non-contacting 3300 NSv Proximity Probe and its corresponding extension cable. The combined length must match the calibrated 7.0-meter system length of the transmitter.
  • Control System Integration: Outputs a linear 4-20 mA signal directly to industrial automation infrastructure, such as PLCs, DCSs, or SCADA networks.
  • Power Supply: Operates as a loop-powered device, requiring an input voltage range of +12 to +35 Vdc at its terminals.
  • Signal Protection: Built-in Power-up Inhibit circuits eliminate false signals during startup, and a Not OK / Signal Defeat circuit clamps the output to prevent false alarms if the probe connection fails.
  • Operating Temperature: -35 °C to +85 °C (-31 °F to +185 °F).
  • Storage Temperature: -51 °C to +100 °C (-60 °F to +212 °F).
  • Probe Operating & Storage: -52 °C to +177 °C (-62 °F to +351 °F).
  • Humidity Resilience: Built with a fully potted construction, protecting internal electronics in humid environments up to 100% condensing (external coaxial connectors must be protected from direct water ingress).
Description
The Bently Nevada 990-04-70-01-00 Vibration Transmitter is designed for original equipment manufacturers (OEMs) of small pumps, motors, fans, and centrifugal compressors who need a reliable 4–20 mA proportional vibration signal for machinery control and protection systems. Its integrated Proximitor Sensor eliminates the need for an external unit, simplifying installation while ensuring accurate peak-to-peak vibration measurement.

This transmitter features a full-scale option of 0–4 mils peak-to-peak (0–100 μm pp) and provides precise incremental scale factor stability within ±10% of 7.87 mV/µm (200 mV/mil) over a 0°C to +70°C (+32°F to +158°F) operating range. The non-interacting zero and span potentiometers under the transmitter label allow easy loop adjustments without affecting other calibration settings.

For diagnostics, the 990-04-70-01-00 includes non-isolated PROX OUT and COM terminals and a coaxial connector to provide a dynamic vibration and gap voltage signal. A Not OK/Signal Defeat circuit ensures safety by dropping the output below 3.6 mA within 100 µs during a fault and automatically recovering within 2–3 seconds after clearance, preventing false alarms from loose connections or faulty probes.

The transmitter offers flexible mounting options with 35 mm DIN rail clips or bulkhead screws for easy installation. Additional features include a Test Input pin for quick loop verification using a function generator, making the 990-04-70-01-00 an ideal solution for industrial vibration monitoring and machinery protection applications.
Alternative Names
990 04 70 01 00 990-04-70-01-01 990-04-70-01-05 990-04-70-02-00 990-04-70-03-00 990-04-50-01-00 990-05-70-01-00
Technical notes
The Bently Nevada 990-04-70-01-00 Vibration Transmitter features a fully integrated Proximitor Sensor that eliminates the need for an external unit, alongside non-interacting zero and span potentiometers beneath the label to support easy loop adjustments.
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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.
What is the 990-04-70-01-00 full-scale vibration range?
The full-scale option is 0–4 mils peak-to-peak (0–100 μm pp).
Where is the 990-04-70-01-00 transmitter manufactured?
It is manufactured by Bently Nevada, a globally trusted industrial vibration monitoring brand.
How is temperature stability handled?
The incremental scale factor remains within ±10% of 7.87 mV/µm (200 mV/mil) from 0°C to +70°C (+32°F to +158°F).
What mounting options are available?
It comes with 35 mm DIN rail clips or bulkhead mounting screws as standard.

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