Overview
Moreover, this transmitter delivers reliable vibration measurement for critical rotating equipment operating in harsh industrial environments.
Therefore, maintenance teams can detect abnormal vibration trends early and reduce unplanned equipment downtime effectively.
Specification
| Specification | Details |
|---|---|
| Model Number | 990-04-70-01-00 |
| Product Type | Vibration Transmitter (2-wire loop-powered) |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Input Sensor | Accepts one non-contacting 3300 NSv proximity probe with extension cable |
| Output Signal | 4–20 mA current loop proportional to vibration level |
| Full-scale Option | 0–4 mils peak-to-peak (0–100 μm peak-to-peak) |
| System Length Option | 7.0 meters (23.0 feet) |
| Loop Accuracy | ±1.5% of full-scale range (4–20 mA) |
| Power Supply | Loop-powered, +12 to +35 V DC |
| Maximum Loop Resistance | 1,000 Ω including field wiring at 35 V DC |
| Current Limiting | Approximately 23 mA typical |
| Zero & Span Adjustments | Non-interacting external potentiometers |
| NOT OK / Signal Defeat | Output drops below 3.6 mA within 100 μs on fault |
| Fault Recovery Time | Restores normal output within 2–3 seconds after fault clears |
| Power-up Inhibit | Output held below 3.6 mA for 2–3 seconds at startup |
| Proximitor Output | Prox Out, approximately 10 kΩ output impedance |
| Prox Out Calibration Load | 10 MΩ |
| Prox Out Linear Range | Approximately 1.4 mm starting around 0.25 mm from target |
| Incremental Scale Factor | ~7.87 mV/μm (200 mV/mil), ±6.5% typical |
| Typical Noise Level | Approximately 50 mV peak-to-peak |
| Frequency Response | Approximately 5 Hz to 6,000 Hz (±3 dB) |
| Minimum Target Size | 9.5 mm diameter |
| Probe Gap Requirement | Approximately 0.5–1.75 mm for rated full-scale accuracy |
| Operating Temperature | –35°C to +85°C (–31°F to +185°F) |
| Storage Temperature | –51°C to +100°C (–60°F to +212°F) |
| Humidity | 5–95% non-condensing |
| Mechanical Robustness | Designed for continuous industrial shock and vibration |
| Mounting Option | 01 – 35 mm DIN rail clips |
| Dimensions | Approximately 100 × 74 × 53 mm |
| Weight | Approximately 0.43–0.54 kg (0.9–1.2 lb) |
| Environmental Rating | Industrial-grade construction |
| Compliance / Certification | CE, CSA / NRTL / C (market dependent) |
FAQ
A1: It continuously measures machine vibration and converts it into a 4–20 mA signal for control systems.Q2: Does this transmitter require an external power supply?
A2: No, it uses a two-wire loop-powered design powered directly by the 4–20 mA circuit.
Q3: Which systems can receive the output signal?
A3: It connects easily to PLCs, DCS systems, and other standard industrial control platforms.
Q4: Is this product suitable for harsh industrial environments?
A4: Yes, it is designed for continuous operation under vibration, temperature, and electrical noise conditions.
Q5: What types of machines commonly use this transmitter?
A5: Pumps, motors, fans, compressors, and other rotating equipment frequently use this model.
Q6: Can this transmitter support predictive maintenance programs?
A6: Yes, it provides continuous vibration data for trending and early fault detection.
Bently Nevada Top Products
| 3500 | 3300 | Probe&Cable |
| 3500/05-01-01-00-00-00 | 3300/05-22-00-00 | 990-04-70-01-00 |
| 3500/05-01-01-05-00-01 | 3300/05-24-00-00 | 990-04-70-02-00 |
| 3500/05-01-02-05-00-01 | 3300/45-02-01-03-00 | 990-04-XX-01-00 |
| 3500/05-01-03-05-00-01 | 3300/45-02-02-03-00 | 990-04-XX-03-00 |
| 3500/05-02-04-00-00-00 | 3300/48-01-01-01-00 | 990-05-50-02-01 |
| 3500/05-02-04-00-00-01 | 3300/48-02-01-00-00 | 990-05-70-01-00 |
| 3500/05-02-05-00-00-00 | 3300/50-01-01-00-00 | 990-05-70-01-01 |
| 3500/05-02-05-00-00-01 | 3300/50-02-01-00-00 | 990-05-70-02-00 |
| 3500/20 125744-02 | 3300/20-13-02-01-00-00 | 990-05-70-03-00 |
| 3500/22 125768-01 | 3300/40-13-01-01-00-00 | 990-05-XX-03-05 |
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