BENTLY NEVADA 990-05-50-02-01 Vibration Transmitter – 3300 XL Series Proximity Transducer System
When a rotating machine loses its vibration monitoring signal, the consequences are not abstract — they are measured in unplanned downtime, damaged bearings, and in the worst cases, catastrophic shaft failures that take weeks to recover from. In refineries, power plants, and compressor stations, the vibration transmitter is the first line of defense: it converts raw shaft displacement data into a 4–20 mA signal that the control system can act on. Without a reliable transmitter in the loop, your protection system is effectively blind.
The BENTLY NEVADA 990-05-50-02-01 occupies a well-defined position within the 3300 XL Proximity Transducer System — a platform that has been the reference standard for rotating machinery protection in the oil & gas, power generation, and petrochemical industries for decades. This specific configuration (5-metre cable, 50 mm range, standard output) is engineered for installations where cable routing constraints and shaft geometry demand a precise, pre-matched transducer-extension-proximitor assembly. It is not a generic transmitter; it is a calibrated system component.
Technical Specifications
Electrical
- Output Signal: 4–20 mA (2-wire, loop-powered)
- Supply Voltage: 18–30 VDC
- Measurement Range: 0–50 mil pp (0–1.27 mm pp)
- Scale Factor: 200 mV/mil (7.87 V/mm)
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Transducer Bias Voltage: –10.5 VDC nominal
Mechanical
- Cable Length: 5 metres (extension cable included)
- Probe Thread: 3/8–24 UNF-2A
- Connector Type: 3-pin MIL-C-5015 (Proximitor end)
- Weight: 440 g (complete assembly)
- Probe Tip Diameter: 8 mm
Environmental
- Operating Temperature: –35°C to +85°C (probe); –35°C to +65°C (Proximitor)
- Storage Temperature: –50°C to +100°C
- Humidity: 0–95% RH, non-condensing
- Vibration (survival): 20 g, 10–2,000 Hz
- Enclosure Rating: IP67 (probe assembly)
Certifications & Standards
- ATEX / IECEx: Ex ia IIC T6 Ga (intrinsically safe)
- FM Approved: Class I, Division 1, Groups A–D
- CE Marked
- Compliant with API 670 (5th Edition) — Machinery Protection Systems
Key Features & Benefits
- Pre-matched, factory-calibrated assembly — The probe, extension cable, and Proximitor are calibrated as a system, eliminating field calibration errors that account for up to 15% of false trips in retrofit installations.
- API 670 compliance — Meets the mandatory machinery protection standard for rotating equipment in oil & gas facilities, satisfying insurance and regulatory requirements without additional documentation.
- 5-metre cable reach — Allows Proximitor mounting outside hazardous zones while the probe remains at the bearing, reducing the number of IS barriers required in the safety loop.
- DC-coupled, wide-bandwidth output — Captures both slow-roll runout (sub-1 Hz) and high-frequency blade-pass events up to 10 kHz, making it suitable for both slow-speed and high-speed machinery without hardware changes.
- Intrinsically safe design — ATEX/IECEx Ex ia certification allows direct installation in Zone 0 hazardous areas without additional explosion-proof enclosures, reducing installation cost by eliminating conduit seals.
- Drop-in compatibility with 3300 Series monitors — Connects directly to BENTLY NEVADA 3300/16, 3300/20, and 3500 series rack monitors, preserving existing wiring infrastructure during system upgrades.
Industry & Equipment Applications
- Oil & Gas — Upstream: ESP motor shaft monitoring on production platforms; gas lift compressor radial vibration measurement where API 670 compliance is contractually required.
- Oil & Gas — Midstream: Pipeline booster compressor and pump protection; shaft orbit analysis on reciprocating compressors at gas processing plants.
- Power Generation: Steam turbine journal bearing displacement monitoring; generator rotor eccentricity measurement during run-up and coast-down.
- Petrochemical & Refining: Cracked gas compressor and reactor feed pump protection in continuous-process units where unplanned shutdowns carry six-figure hourly costs.
- Marine & Offshore: Propulsion shaft and thruster motor monitoring on FPSOs and drillships operating in classified hazardous areas.
- Pulp, Paper & Mining: High-speed centrifugal fan and mill drive bearing monitoring; kiln drive shaft displacement measurement in cement plants.
System Integration & Compatible Parts
Upstream components (monitors & racks):
- BENTLY NEVADA 3500/42M — Proximitor/Seismic Monitor (direct input, no signal conditioning required)
- BENTLY NEVADA 3300/16 — 16-channel proximity monitor rack
- BENTLY NEVADA 3300/20 — Dual-channel radial vibration monitor
Downstream / associated components:
- BENTLY NEVADA 330130-080-00-00 — 8-metre armoured extension cable (for longer cable runs)
- BENTLY NEVADA 330180-X1-05 — Proximitor housing for panel mounting
- MTL 728 / P+F KFD2-STC4-Ex1 — Zener barriers / galvanic isolators for IS loop integrity
Equivalent / substitute models:
- BENTLY NEVADA 990-05-70-02-01 — 7-metre cable variant; direct substitute when cable routing requires additional reach; no recalibration required if Proximitor is also replaced as a matched set.
- BENTLY NEVADA 330500-02-00 — 3300 XL 8 mm probe system; functionally equivalent for new installations; requires verification of gap voltage and scale factor against existing monitor configuration before substitution.
Our Quality Assurance Process
Every BENTLY NEVADA 990-05-50-02-01 unit sourced through Konmask.com passes a structured 4-step verification process before shipment:
- Source verification: Units are traced to authorised distribution channels or documented decommissioning records. We do not accept units of unknown provenance.
- Visual and mechanical inspection: Probe tip, connector pins, cable jacket, and Proximitor housing are inspected against OEM acceptance criteria. Units with damaged threads, bent pins, or compromised cable shielding are rejected.
- Functional output test: Each Proximitor is powered at 24 VDC and output linearity is verified across the 0–50 mil measurement range using a calibrated target simulator. Scale factor deviation must be within ±1% of nominal.
- Documentation package: Shipped with test report, serial number record, and — where available — original OEM calibration certificate, CE/ATEX declaration of conformity, and material traceability records.
How to Order
- Submit your enquiry: Send your part number, required quantity, and delivery timeline via the enquiry form on this page or directly to support@konmask.com. Include your application details if you need compatibility confirmation.
- Receive your quotation: Our technical team reviews your request and responds within 24 hours with pricing, lead time, and available stock status. For urgent requirements, call +0086 19859288691.
- Confirm and ship: Upon order confirmation, units are re-inspected, packed to IEC 60068-2 transport standards, and dispatched with full documentation. DDP, DAP, and EXW Incoterms are available.
Why Choose Konmask.com?
- Technical depth: Our team includes engineers with hands-on experience in rotating machinery protection systems — we can discuss your application, not just process your order.
- Verified sourcing: We maintain documented supply chain records for every unit. You receive traceability, not just a part number on a box.
- 24-hour response commitment: Every enquiry receives a substantive technical and commercial response within one business day, regardless of time zone.
- Flexible logistics: We ship globally under DDP, DAP, and EXW terms. Dangerous goods and ATEX-certified equipment export documentation is handled in-house.
- Long-term partnership focus: We maintain stock records and sourcing contacts for obsolete and long-lead BENTLY NEVADA components, supporting your maintenance planning beyond a single transaction.
Frequently Asked Questions
Q: Can the BENTLY NEVADA 990-05-50-02-01 be used as a direct replacement for a 3300 XL 8 mm probe system on an existing 3500 series rack?
A: The 990-05-50-02-01 is a matched Proximitor/probe/extension assembly calibrated for the 3300 XL platform. Before substituting it into a 3500 series rack, verify that the monitor channel is configured for the correct scale factor (200 mV/mil) and that the gap voltage at the installed air gap falls within the linear range (–10 ± 1 VDC). If the existing rack is configured for a different probe diameter or scale factor, a reconfiguration of the monitor channel is required.
Q: What is the maximum cable distance between the 990-05-50-02-01 probe and the control room monitor, and does it affect accuracy?
A: The 5-metre extension cable in this assembly is the calibrated cable length. Adding field extension cable beyond the factory assembly is not recommended without re-characterising the system, as additional cable capacitance shifts the Proximitor’s linear range. For longer runs, specify the 7-metre variant (990-05-70-02-01) or use a signal conditioner/repeater approved for the 3300 XL system.
Q: Is the BENTLY NEVADA 990-05-50-02-01 vibration transmitter suitable for Zone 1 hazardous area installation without an additional explosion-proof enclosure?
A: Yes. The assembly carries ATEX Ex ia IIC T6 Ga certification, which permits installation in Zone 0, 1, and 2 hazardous areas as an intrinsically safe apparatus, provided it is connected to a certified associated apparatus (IS barrier or galvanic isolator) with compatible entity parameters (Ui, Ii, Pi, Ci, Li). No additional explosion-proof enclosure is required for the probe or Proximitor in this configuration.
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “BENTLY NEVADA 990-05-50-02-01 Vibration Transmitter”,
“description”: “BENTLY NEVADA 990-05-50-02-01 is a 3300 XL Series proximity transducer system vibration transmitter with 5-metre cable, 50 mil range, 4-20 mA output, ATEX Ex ia IIC T6 certified, API 670 compliant. Supplied by Konmask.com with full documentation.”,
“sku”: “990-05-50-02-01”,
“brand”: {
“@type”: “Brand”,
“name”: “BENTLY NEVADA”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “BENTLY NEVADA”
},
“model”: “990-05-50-02-01”,
“category”: “Vibration Transmitter / Proximity Transducer System”,
“url”: “https://konmask.com/products/bently-nevada-990-05-50-02-01-vibration-transmitter-3300-series”,
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/bently-nevada-990-05-50-02-01-vibration-transmitter-3300-series”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “Can the BENTLY NEVADA 990-05-50-02-01 be used as a direct replacement for a 3300 XL 8 mm probe system on an existing 3500 series rack?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 990-05-50-02-01 is a matched Proximitor/probe/extension assembly calibrated for the 3300 XL platform. Before substituting it into a 3500 series rack, verify that the monitor channel is configured for the correct scale factor (200 mV/mil) and that the gap voltage at the installed air gap falls within the linear range (–10 ± 1 VDC). If the existing rack is configured for a different probe diameter or scale factor, a reconfiguration of the monitor channel is required.”
}
},
{
“@type”: “Question”,
“name”: “What is the maximum cable distance between the 990-05-50-02-01 probe and the control room monitor, and does it affect accuracy?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 5-metre extension cable in this assembly is the calibrated cable length. Adding field extension cable beyond the factory assembly is not recommended without re-characterising the system, as additional cable capacitance shifts the Proximitor’s linear range. For longer runs, specify the 7-metre variant (990-05-70-02-01) or use a signal conditioner/repeater approved for the 3300 XL system.”
}
},
{
“@type”: “Question”,
“name”: “Is the BENTLY NEVADA 990-05-50-02-01 vibration transmitter suitable for Zone 1 hazardous area installation without an additional explosion-proof enclosure?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. The assembly carries ATEX Ex ia IIC T6 Ga certification, which permits installation in Zone 0, 1, and 2 hazardous areas as an intrinsically safe apparatus, provided it is connected to a certified associated apparatus (IS barrier or galvanic isolator) with compatible entity parameters. No additional explosion-proof enclosure is required for the probe or Proximitor in this configuration.”
}
}
]
}
]
}
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
