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Product Description – Bently Nevada 990-04-70-01-00 Vibration Transmitter
The Bently Nevada 990-04-70-01-00 is a two-wire, loop-powered vibration transmitter designed for OEMs. It interfaces with a 3300 NSv proximity probe and provides a 4–20 mA signal proportional to peak-to-peak vibration. Ideal for small rotating machines, it simplifies monitoring and alarm integration.
Product Applications – 990-04-70-01-00 Transmitter Use Cases
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Centrifugal air compressors
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Small motors and industrial pumps
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Skid-mounted process equipment
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HVAC fans
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Rotating assets in compact enclosures
Product Advantages – Benefits of 990-04-70-01-00 Vibration Transmitter
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Built-in Proximitor® sensor eliminates external modules
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Delivers reliable 4–20 mA signal for trending
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Tolerates 100% humidity with potted construction
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Quick response to faults with NOT OK logic (<100 µs)
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Adjustable span/zero for simplified calibration
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DIN rail or bulkhead mounting included
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Diagnostic PROX OUT terminal for dynamic signal output
Technical Specifications – 990-04-70-01-00 Vibration Transmitter
| Parameter | Specification |
|---|---|
| Model | 990-04-70-01-00 |
| Output Range | 4–20 mA DC |
| Vibration Range | 0–4 mils (0–100 µm) peak-to-peak |
| Input | 3300 NSv Proximity Probe |
| Frequency Response | 5 Hz to 6,000 Hz |
| Power Supply | 12–35 VDC |
| Max Loop Resistance | 1000 Ω @ 35 VDC |
| Accuracy | ±1.5% full-scale |
| Operating Temp. | -35°C to +85°C |
| Storage Temp. | -52°C to +100°C |
| Relative Humidity | 100% condensing |
| Dimensions (L×W×H) | 100.1 × 73.9 × 53.3 mm |
| Weight | 0.43 kg |
| Certifications | CSA Div 2, ATEX Z0/Z2, ABS, RoHS |
FAQ – Common Questions about 990-04-70-01-00 Transmitter
Q1: What probe is compatible with this model?
A1: The transmitter supports the Bently Nevada 3300 NSv proximity probe.
Q2: What kind of signal does it output?
A2: It outputs a 4–20 mA signal proportional to vibration level.
Q3: Is it certified for hazardous areas?
A3: Yes, it supports CSA Division 2 and ATEX Zone 0/2 environments.
Q4: Can I mount it on a DIN rail?
A4: Yes, it supports DIN rail and bulkhead mounting.
Q5: How does it behave during a fault?
A5: It outputs <3.6 mA within 100 µs when a NOT OK condition occurs.
Q6: Does it support vibration diagnostics?
A6: Yes, through the PROX OUT terminal (use isolation adapter for AC test equipment).
Q7: Is it suitable for marine environments?
A7: Yes, it complies with ABS maritime standards.
Q8: How do I calibrate it?
A8: Use the external span and zero potentiometers.
Q9: Can it handle high humidity?
A9: Yes, the housing is potted to operate in 100% condensing humidity.
Q10: What is the full-scale vibration range for this model?
A10: 0–4 mils peak-to-peak (0–100 µm pp).
Related Models – Bently Nevada 990 Series Transmitters
| Model Number | Vibration Range | Cable Length | Mounting | Weight |
|---|---|---|---|---|
| 990-05-50-01-01 | 0–5 mils (125 µm) | 5.0 m | DIN Rail | 0.43 kg |
| 990-08-70-02-00 | 0–8 mils (200 µm) | 7.0 m | Bulkhead | 0.43 kg |
| 990-10-50-01-00 | 0–10 mils (250 µm) | 5.0 m | DIN Rail | 0.43 kg |
| 990-04-50-02-01 | 0–4 mils (100 µm) | 5.0 m | Bulkhead | 0.43 kg |
| 990-08-70-01-01 | 0–8 mils (200 µm) | 7.0 m | DIN Rail | 0.43 kg |
| 990-05-70-03-01 | 0–5 mils (125 µm) | 7.0 m | DIN + Bulkhead | 0.43 kg |
Popular Models – Other Bently Nevada Instruments
| Model Number | Description | Output Type | Dimensions (mm) | Weight |
|---|---|---|---|---|
| 3500/42M-01-00 | Proximitor Seismic Monitor | Buffered/Relay | 241 × 24 × 241 | 0.91 kg |
| 3500/22M | TDI Transient Data Interface | Ethernet | 241 × 24 × 241 | 0.91 kg |
| 3500/15 | Power Supply Module | 28V DC | 241 × 24 × 241 | 0.90 kg |
| 3500/20 | Rack Interface Module | Buffered Output | 241 × 24 × 241 | 0.85 kg |
| 330180-91-00 | 3300 XL Proximitor Sensor | Voltage Signal | 65 × 65 × 20 | 0.22 kg |
| 3500/94 | VGA Display Interface | VGA | 241 × 24 × 241 | 0.95 kg |
