Product Overview
Upgrade your vibration monitoring system with the Bently Nevada 990-10-70-02-CN. This 990 Vibration Transmitter is designed to replace older units or enhance existing setups. It accepts one non-contacting 3300 NSv Proximity Probe and extension cable, providing reliable vibration measurement for critical rotating machinery. The unit is made in the U.S.A. and features a full-scale option of 0-10 mils pp (0-250 μm pp), a 7.0-meter system length, bulkhead screw mounting, and CN agency approval.
Key Technical Specifications
| Parameter |
Value |
| Input |
1 non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Supply |
+12 to +35 Vdc at transmitter terminal |
| Output Signal |
4-20 mAdc over specified full-scale range (2-wire) |
| Accuracy |
Within ±1.5% over full-scale range (measured across 250 Ω loop resistance) |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| Frequency Response |
5 Hz to 6,000 Hz +0, 3 dB |
| Probe Gap Range |
0.5 to 1.75 mm (20 to 55 mils) |
| Minimum Target Size |
9.5 mm (0.375 in) diameter |
| Weight |
0.43 kg (0.9 lbm) |
| Leadwire Length (BNC) |
Maximum 3 meters (10 feet) |
| Not OK Response |
Output <3.6 mA within 100 μs; restored within 2-3 seconds |
Industry Applications
The Bently Nevada 990-10-70-02-CN excels in monitoring vibration on turbines, compressors, pumps, and other rotating equipment. As an upgrade, it offers faster Not OK signal defeat and improved accuracy over older vibration transmitters. In petrochemical plants, it provides early detection of bearing faults and shaft imbalance, reducing unplanned downtime. For power generation, the unit’s 4-20 mA output integrates seamlessly with DCS and PLC systems.
Installation & Setup
Mount the Bently Nevada 990-10-70-02-CN using the bulkhead screws provided (mounting option 02). Ensure the probe gap is between 0.5 and 1.75 mm (20-55 mils) from the target to achieve full-scale range. The Non-hazardous, Zone 2 or Div 2 area rated unit requires a power supply of +12 to +35 Vdc at the transmitter terminal. For the Proximitor Sensor Output (BNC connector), keep cable length under 3 meters (10 feet). Use the non-interacting external adjustments to set zero and span without affecting each other.
Selection Guide & Purchasing Advice
Before purchasing, verify that your system requires the 990-10-70-02-CN configuration: full-scale option 10 (0-10 mils pp), system length 70 (7.0 meters), mounting option 02 (bulkhead screws), and CN agency approval. The transmitter works only with 3300 NSv proximity probes and extension cables. Ensure your probe gap and target size meet the minimum requirements (9.5 mm diameter). For reliable supply and expert support, contact ubest101 to confirm compatibility and lead times. PLC Source PRO offers genuine Bently Nevada 990-10-70-02-CN modules backed by industry expertise.