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The 990-08-50-01-05 is a 990 series eddy current vibration transmitter. This hardware is a two-wire, loop-powered industrial-grade signal processing module used to directly convert mechanical vibration physical quantities measured by non-contact proximity probes into 4 to 20 mA analog current signals receivable by standard industrial control systems.
Non-interacting zero and span potentiometers under the Transmitter label supports loop adjustment
Test Input pin for quick verification of loop signal output, using a function generator as the input
A Not OK/Signal Defeat circuit prevents high outputs or false alarms due to a faulty proximity probe or loose connection
The 990 Vibration Transmitter 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 transmitter is a two-wire, loop-powered device that accepts input from our 3300 NSv proximity probe and its matching extension cable (available in 5 m and 7 m system length options). The transmitter 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 as the input to the control system where machinery protection alarming and logic occurs.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 990-08-50-01-05 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.
Oil & Gas Upstream
Monitoring fluid-film bearing shaft vibration of large enclosed pipeline oil pumps on offshore platforms and onshore gathering stations to prevent sudden failures of critical pump trains.
Refining & Petrochemical
Installed on low-to-medium power centrifugal compressors to output real-time 4-20 mA vibration signals to the plant DCS, achieving continuous asset condition monitoring.
Thermal Power Generation
Monitoring the journal shaft vibration of core plant auxiliaries—boiler feed pumps and booster pumps, ensuring water supply safety under high load conditions.
Gas Turbine Power Generation
Installed on the bearing housings of generators driven by small-to-medium industrial gas turbines to monitor the dynamic unbalance and misalignment states of the generator rotor online.
Pulp & Paper Industry
Installed on the drive bearing housings of large refiners in pulp mills, converting transient rotor vibrations caused by severe load fluctuations into 4-20 mA signals for the central control room.
Cement & Building Materials
Used for axial/radial runout monitoring of large kiln induced draft (ID) fans with fluid-film bearings on cement clinker production lines, preventing bearing burnout caused by severe misalignment.
When using the 990-08-50-01-05, special attention must be paid to parameter matching. It must be strictly matched with a 3300 NSv proximity probe and a 5.0-meter total system cable length, as any mismatch will cause severe distortion of the 4-20 mA current output.
The transmitter is two-wire loop-powered by 24V DC, so it is crucial to prevent reverse polarity connection or overvoltage burnout caused by omitting a safety barrier. When mounting on a 35mm DIN rail, ensure proper grounding and keep it away from high-power variable frequency drives, while the ClickLoc coaxial connector must be fitted with a protector kit to completely isolate it from on-site oil and moisture.
When paired with a 3300 NSv proximity probe, the 990-08-50-01-05 directly converts mechanical vibration into a standard 4 to 20 mA current signal. It is equipped with a BNC dynamic signal output port and multiple country hazardous area safety certifications, making it suitable for PLC/DCS protection integration of mid-size to small rotating machinery.
It is a Bently Nevada 990 series vibration transmitter, which is a two-wire, loop-powered industrial-grade signal processing hardware.
What physical mounting option does 990-08-50-01-05 utilize?
This model is configured with 35 mm DIN-rail clips, allowing it to be snapped directly onto a standard rail inside electrical control cabinets.
Can 990-08-50-01-05 be installed in hazardous, explosive areas?
Yes. This model holds multiple global hazardous area agency safety approvals 990 Transmitter under intrinsically safe (Ex ia) standards, making it suitable for flammable and explosive locations.
How do you connect and power the 990-08-50-01-05 transmitter?
It is a two-wire device, where the power supply (typically 24 Vdc) and the 4-20 mA signal output share the exact same pair of twisted wires.
What industrial customers and applications does 990-08-50-01-05 mainly target?
It primarily targets Original Equipment Manufacturers (OEMs) of small to mid-size pumps, motors, fans, or centrifugal air compressors, integrating vibration signals directly into existing control systems.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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