Overview
Manuals
Basic Info
Module Components
Use Cases
Features:
- 990 Vibration Transmitter
- Integrated Proximitor Sensor requires no external unit
- Test Input pin for quick verification of loop signal output, using a function generator as the input
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 peakto-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.
The 990-04-70-01-05 Bently Nevada 990 Vibration Transmitter may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-04-70-01-05 990 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.
- Model: 990-04-70-01-05
- Warranty: One-year warranty
- Condition: Brand new, original, in stock
- Product Family: 990 Vibration Transmitter
990 Vibration Transmitter
990-Axx-Bxx-Cxx-Dxx
A: Full-scale
04: 0-4 mils pp (0-100 μm pp)
05: 0-5 mils pp (0-125 μm pp)
08: 0-8 mils pp (0-200 μm pp)
10: 0-10 mils pp (0-250 μm pp)
B: System Length
50: 5.0 meters (16.4 feet)
70: 7.0 meters (23.0 feet)
C: Mounting
01: 35 mm DIN rail clips
02: Bulkhead screws
03: DIN clips and screws
D:Agency Approval
00: Not required
01: CSA Division 2
05: CSA Division 2, ATEX Zone 0, ATEX Zone 2 and includes ABS maritime approval
Industrial Fans and Blowers: Monitors radial shaft deflection caused by dust buildup, blade imbalance, or structural aerodynamic resonance.
Large Motor Bearings: Detects early signs of internal mechanical wear, rotor imbalance, or misalignment in high-power induction motors.
Centrifugal Pumps: Tracks fluid instability, impeller imbalance, or abnormal oil swirl within fluid transfer pumps or cooling water pumps.
Applications: Integrators of small centrifugal air compressors, industrial refrigeration units, or process gas screw compressors can install the Model 990 transmitter in the machine's local junction box.
Benefits: Due to its standard 4-20 mA loop signal output, OEMs can connect it directly to the machine's local PLC or HMI, providing end customers with a fully monitored, self-protected skid-mounted device.
Applications: This transmitter can be directly connected to standard analog input cards in factory DCS (e.g., Honeywell Experion, Emerson DeltaV) or industrial PLCs (e.g., Siemens S7-1500, Allen-Bradley ControlLogix).
Advantages: Trend analysis, emergency alarms, and plant safety trip interlocks can all be implemented through standard automated programming modules, fully utilizing the 0-4 mil measurement range.
Offshore Platforms and Vessels: Suitable for continuous monitoring of machinery in harsh salt spray environments, compliant with ABS Marine regulations.
Upstream Oil & Gas/Chemical Plants: Can be installed in Category I Zone 2 or ATEX Zone 0 environments (with safety barriers required) to monitor pumps transporting volatile gases; high-voltage or arc-generating equipment is prohibited in these environments.
Applications: Reliability engineers route 4-20 mA signals to the plant loop for trend analysis while connecting portable analyzers (e.g., Bently Nevada SCOUT or Emerson CSI) to the physical PROX OUT coaxial port.
Advantages: Plant maintenance teams can perform complex dynamic diagnostics, such as analyzing trajectory plots, time-synchronized averages, and frequency spectrum (FFT), without interfering with safety circuits or shutting down machines.
