Product Overview
When your rotating machinery requires precise vibration monitoring, the Bently Nevada 990-10-70-03-00 vibration transmitter delivers reliable performance. This compact module accepts one non-contacting 3300 NSv proximity probe and extension cable, converting shaft displacement into a standard 4-20 mA signal. Designed as a drop-in replacement for older 990 series units, the 990-10-70-03-00 ensures seamless integration with existing Bently Nevada monitoring systems.
Part of the proven 990 family, this transmitter offers a full-scale option of 0-10 mils pp (0-250 μm pp) with a system length of 7.0 meters (23.0 feet). The mounting option includes DIN clips and screws for secure installation in control panels.
Technical Specifications
The Bently Nevada 990-10-70-03-00 is built for accuracy and reliability. Key parameters include:
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Input: Accepts 1 non-contacting 3300 NSv proximity probe and extension cable.
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Power: Requires +12 to +35 Vdc input at transmitter terminal.
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Output: 4-20 mAdc over specified full-scale range in 2-wire configuration.
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Accuracy: Within ±1.5% over full-scale range (from TEST signal to voltage across 250 Ω load).
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Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc.
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Current Limiting: 23 mA typical.
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Frequency Response: 5 Hz to 6,000 Hz +0, -3 dB.
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Probe Gap: 0.5 to 1.75 mm (20 to 55 mils) from target.
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Weight: 0.43 kg (0.9 lbm).
Industry Applications
The 990-10-70-03-00 excels in continuous vibration monitoring of turbines, compressors, pumps, and fans. For example, in a steam turbine installation, the transmitter provides real-time shaft vibration data to predictive maintenance systems, helping avoid unplanned downtime. In petrochemical plants, upgrading older displacement measurement loops with this module improves accuracy and reduces false alarms.
Installation & Setup Guide
Mount the transmitter using the DIN clips and screws provided. Connect the 3300 NSv proximity probe and extension cable (max leadwire length 3 meters via BNC connector). Power the unit with +12 to +35 Vdc at the transmitter terminals. Adjust zero and span using non-interacting external potentiometers. The signal output automatically goes below 3.6 mA within 100 µs upon a Not OK condition, with recovery within 2-3 seconds.
Compatibility & Integration
This Bently Nevada 990-10-70-03-00 module is compatible with all 3300 series non-contacting probes and extension cables. It integrates directly into 4-20 mA control loops for DCS, PLC, or dedicated vibration monitoring systems. The transmitter is suitable for non-hazardous, Zone 2, and Division 2 hazardous area locations when powered from a 28 V supply.
Selection Guide & Purchasing Advice
Before purchasing the 990-10-70-03-00, verify your full-scale range requirement (0-10 mils pp), system length (7.0 meters), and mounting preference (DIN clips/screws). Ensure your probe connector matches the input. For reliable sourcing, ubest101 offers genuine Bently Nevada modules with prompt shipping and full traceability.