Bently Nevada 990-05-70-03-00 Vibration Transmitter - Brand New
Manufacturer: Bently Nevada
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Part Number: 990-05-70-03-00
Condition：New with Original Package
Product Type: Vibration Transmitters
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Bently Nevada 990-05-70-03-CN (990-05-70-03-00) functions as a high-precision, loop-powered vibration transmitter designed for absolute casing vibration measurement. Unlike proximity probes that monitor relative shaft motion, this velocity transducer mounts directly to the machine housing to detect structural vibrations. It converts mechanical motion into a robust electrical signal compatible with the Bently Nevada 3300 and 3500 series racks, as well as direct PLC/DCS analog inputs. We supply this unit as 100% Brand New and Original in factory packaging, ensuring mission-critical reliability for turbomachinery protection.
Part Number Breakdown: 990-05-AA-BB-CC
The 990-05 series utilizes a modular code system to define sensitivity and mounting hardware.
| Code | Option | Description |
| 05 | Transmitter Type | Enhanced Velocity Transducer (Casing Vibration) |
| 70 | Sensitivity | 70 mV/in/sec (2.75 mV/mm/s) nominal |
| 03 | Mounting Thread | 3/8-24 UNF Stud Mount |
| CN | Agency Approvals | Region-specific certifications (ATEX, IECEx, CSA) |
Technical Specifications
| Parameter | Details |
| Measurement Type | Casing Vibration (Velocity) |
| Sensitivity | 70 mV/in/sec nominal |
| Frequency Response | 10 Hz to 1,000 Hz (600 to 60,000 CPM) |
| Dynamic Range | ±50 g peak |
| Output Signal | Voltage proportional to vibration velocity |
| Housing Material | 316L Stainless Steel |
| Operating Temp | -30°C to +100°C (-22°F to +212°F) |
| Mounting | 3/8-24 UNF threaded stud |
Engineering Advantages
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High Sensitivity for Early Detection: The 70 mV/in/sec sensitivity provides superior signal resolution compared to standard 50 mV sensors. This allows the monitoring system to detect subtle changes in bearing wear or mechanical looseness long before a catastrophic failure occurs.
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Self-Shielded 2-Wire Design: The 2-wire configuration simplifies field wiring and reduces installation costs. The internal electronics provide high immunity to RFI and EMI, preventing false trips in environments with high-voltage switchgear or variable frequency drives (VFDs).
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Rugged Construction: The 316L stainless steel housing resists corrosive chemical exposure and extreme humidity (up to 95% non-condensing). This durability makes it the standard choice for offshore platforms and cooling tower applications.
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Direct Rack Integration: This transmitter interfaces seamlessly with Bently Nevada 3500/42M or 3300/16 monitor modules. It provides the conditioned signal necessary for the rack to perform trending, alarming, and safety-critical machine shutdowns.
FAQs
Q: Can I mount the 990-05-70-03-CN in any orientation?
A: Yes. You can install the sensor vertically, horizontally, or at any angle. However, the internal sensing element is directional; you must align the axis of the sensor with the direction of the vibration you wish to monitor (typically horizontal or vertical on the bearing housing).
Q: Does this sensor require an external Proximitor®?
A: No. Unlike proximity probes, the 990-05 is a self-contained velocity transducer. It does not require a separate signal conditioner, although it does require a power source (typically provided by the 3300/3500 rack or a 24V DC loop).
Q: What is the benefit of the 3/8-24 UNF mounting thread?
A: This thread size is a heavy-duty industrial standard. It ensures a high-stiffness connection between the machine casing and the sensor, preventing "sensor resonance" from distorting high-frequency vibration data.
Q: Is this module suitable for hazardous areas?
A: Absolutely. The "CN" designation signifies hazardous location approvals, including ATEX and IECEx. When installed with appropriate intrinsic safety barriers, it operates safely in explosive gas atmospheres.