Bently Nevada 990-04-70-01-00 990 Series 2-Wire Vibration Transmitter
The Bently Nevada 990-04-70-01-00 is a precision 2-wire vibration transmitter designed to provide a continuous 4–20 mA output proportional to radial vibration. Unlike standard rack-based modules, the 990 Series is an integrated solution that combines the functions of a Proximitor sensor and a signal conditioner into a single, compact unit. This specific configuration is engineered to interface exclusively with Bently Nevada 3300 NSv proximity probes, making it the ideal choice for small-shaft machinery or applications with restricted mounting space.
The 990-04-70-01-00 follows a specific configuration logic: the 04 code denotes a full-scale range of 0–4 mils pp (0–100 µm pp), the 70 signifies a 7.0-meter system length calibration, and the 01 indicates a 35 mm DIN rail mounting clip. This transmitter simplifies machinery protection by allowing direct integration into a PLC or DCS without the need for a dedicated monitoring rack. It is fully compliant with API 670 standards for machinery protection, ensuring reliable performance in high-stakes industrial environments.
Detailed hardware parameters for the 990-04-70-01-00:
| Parameter | Specification Details |
| Model Number | 990-04-70-01-00 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Transmitter Series | 990 Series Vibration Transmitter |
| Full-Scale Range | 0–4 mils pp (0–100 µm pp) |
| System Length | 7.0 Meters (23.0 Feet) |
| Mounting Type | 35 mm DIN Rail Clips |
| Compatible Sensor | 3300 NSv Proximity Probe (Non-contacting) |
| Output Signal | 4–20 mA DC (Proportional to vibration) |
| Supply Voltage | +12 Vdc to +35 Vdc |
| Operating Temperature | -35 °C to +85 °C |
| Frequency Response | 10 Hz to 1,000 Hz |
| Net Weight | 0.54 kg |
| Certifications | CE, UL, cUL (Code 00: No Agency Approvals) |
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