The 990-05-70-01-06 is a 2-wire, loop-powered device that integrates a proximitor sensor and signal conditioner to output a proportional 4 to 20 mA signal for PLC/DCS machinery 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
Choice of DIN-rail clips or bulkhead mounting screws as standard options simplifies mounting
The 990-05-70-01-06 transmitter is used with centrifugal air compressors, small pumps, motors, or fans to provide a simple 4 to 20 mA proportional vibration signal to control systems. This two-wire, loop-powered device accepts input from the 3300 NSv proximity probe and its matching extension cable. Based on the part number configuration, this model specifies a 7.0-meter (23 feet) total system length and a full-scale range of 0 to 125 µm (0 to 5 mils) peak-to-peak vibration displacement.
The transmitter transforms the signal into an industry-standard 4 to 20 mA output, which serves as the input to PLC, DCS, or SCADA systems where machinery protection alarming and logic occur. This model includes 35 mm DIN-rail clips for installation and carries European (ATEX/IECEx) intrinsically safe and non-incendive hazardous area approvals for secure mounting in restricted industrial zones.
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 990-05-70-01-06 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.
Compressed Air Manufacturing Industry
Used for relative shaft vibration monitoring on high-speed, small-diameter journals of integrally geared centrifugal air compressors.
Fine Chemical Industry
Used for capturing radial runout on main shafts of small-to-medium chemical transfer pumps and agitators within flammable hazardous process areas.
Petroleum Refining Industry
Used for dynamic axial and radial displacement measurements on high-temperature, high-pressure rotating machinery such as high-pressure hydro-feed pumps and light hydrocarbon reflux pumps.
Thermal Power Generation Industry
Used for capturing main shaft vibration inside the bearing housings of boiler forced/induced draft fans and low-power auxiliary steam turbines.
Steel & Metallurgical Industry
Used for real-time runout monitoring on rotors of blast furnace Top Gas Recovery Turbine (TRT) units and high-speed converter dedusting exhaust fans.
Pharmaceutical Industry
Used for precision rotor monitoring on high-speed centrifugal separators for drug purification and centrifugal compressors in sterile air supply systems.
It is critical to strictly match the 3300 NSv proximity probe and extension cable system with a total length of 7.0 meters, and never alter the cable length to avoid disrupting the factory electromagnetic calibration. When mounted on a DIN rail the transmitter must maintain proper electrical isolation from the external metal enclosure to prevent ground noise from interfering with the measurement signal.
Since it utilizes a two-wire loop power configuration ensure the DC supply voltage remains within the specified safe window of 12V to 35V during wiring. Lastly when collecting raw on-site signals unfiltered dynamic voltage can be accessed via the dedicated coaxial port, but avoid applying external loads to this interface.
The Bently Nevada 990-05-70-01-06 needs a constant external loop power supply from +12 to +35 Vdc at the terminal block to maintain output precision across the entire frequency range. When using the Bently Nevada 990-05-70-01-06, the total combined length of the probe and extension cable must be exactly 7.0 meters to ensure the correct 7.87 mV/µm (200 mV/mil) prox-out scale factor.
990-05-70-01-06 is a loop-powered industrial vibration transmitter that converts eddy current probe signals into standard 4-20 mA current signals.
How do you use a product like 990-05-70-01-06?
Clip it onto a 35 mm rail and connect it to a compatible proximity probe system then wire its two-wire loop directly into the plant DCS or PLC modules.
What metrics of large machinery does 990-05-70-01-06 primarily measure?
It primarily measures the radial vibration at rotating machinery bearings and the dynamic shaft vibration of the rotor relative to the bearing housing continuously.
Does 990-05-70-01-06 require an external independent AC power supply?
No, it is a standard loop-powered device that draws operational power directly through the 4-20 mA DC current loop.
Which Bently Nevada probe series is compatible with 990-05-70-01-06?
It is specifically calibrated and matched for the Bently Nevada 3300 NSv proximity probe system.
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