Product Overview
The 3300/20-12-01-03-00-00 is a dual-channel thrust position monitor from Bently Nevada’s 3300 machinery protection system, engineered to safeguard rotating equipment by continuously measuring shaft axial position. Designed for critical applications in power generation, oil & gas, and heavy manufacturing, this module detects thrust bearing wear, misalignment, or overload conditions that could lead to catastrophic machinery failure. By monitoring two independent channels of axial movement relative to bearing clearances, it provides real-time data to operators, enabling proactive maintenance and minimizing downtime.
As part of the 3300 series, the 3300/20-12-01-03-00-00 integrates seamlessly with Bently Nevada’s ecosystem of proximity probes (e.g., 330103) and monitoring modules. Its compact 3U rack-mount design fits into standard industrial enclosures, while rugged construction ensures reliable performance in harsh environments with extreme temperatures, vibration, and electromagnetic interference. The module’s user-programmable alarm thresholds and diagnostic capabilities further enhance its value, making it a cornerstone of predictive maintenance strategies for machinery trains like steam turbines, compressors, and pumps.
Technical Specifications
| Parameter |
Value |
| Product Model |
3300/20-12-01-03-00-00 |
| Manufacturer |
Bently Nevada |
| Product Type |
Dual Thrust Position Monitor (3300 Series) |
| Measurement Range |
±1.0 mm (full-scale) |
| Input Compatibility |
3300/7200 Proximitor systems (200 mV/mil sensitivity) |
| Output Signals |
4–20 mA analog (per channel), digital (Modbus RTU) |
| Power Supply |
24 VDC (20–28 VDC range) |
| Accuracy |
±0.33% of full-scale (typical) |
| Operating Temperature |
0°C to +65°C (32°F to 149°F) |
| Storage Temperature |
-40°C to +85°C (-40°F to 185°F) |
| Alarm Setpoints |
Bi-directional (normal/counter) |
| Mounting Type |
3300 system rack slot |
| Certifications |
UL, CE |
| Dimensions |
133 mm height × 483 mm width × 230 mm depth |
Key Features and Benefits
The 3300/20-12-01-03-00-00 excels in precision and versatility. Its dual-channel architecture allows simultaneous monitoring of two thrust bearing positions, providing redundant data for critical machinery. Each channel supports user-programmable sensitivity (200 mV/mil or 100 mV/mil) and alarm thresholds, enabling customization for specific equipment requirements. For example, in a gas turbine, operators can set alerts for axial movement exceeding 0.8 mm, triggering maintenance before bearings degrade.
Integration with Bently Nevada’s proximity probes ensures seamless signal transmission. The module accepts inputs from 330103 probes, which directly observe thrust collars to measure axial displacement with ±0.1% accuracy. Buffered transducer outputs on both front and rear panels simplify system wiring, while short-circuit protection safeguards against electrical faults.
Reliability is built into its design. The module’s epoxy-sealed alarm relays (option 03) resist moisture and dust, making it suitable for offshore platforms and chemical plants. LED indicators on the front panel provide real-time status updates, such as power, sensor connectivity, and alarm activation, reducing troubleshooting time.
For system scalability, the 3300/20-12-01-03-00-00 works with 3300/12 power supplies and 3300/22M communication gateways. This allows temperature, vibration, and thrust data to be centralized in a SCADA system, supporting holistic machinery health analysis.
Application Scenarios
In combined-cycle power plants, the 3300/20-12-01-03-00-00 monitors axial movement in steam turbine thrust bearings. By detecting deviations from nominal positions (e.g., ±0.5 mm), it prevents overheating caused by misalignment—a common issue in high-speed turbines. This data, paired with vibration readings from 3300/16 modules, helps operators balance maintenance schedules to avoid unplanned outages.
In oil refineries, the module safeguards centrifugal compressors used in hydrocarbon processing. Axial thrust changes in these machines can indicate seal wear or process upsets. The 3300/20-12-01-03-00-00’s dual-channel monitoring ensures early detection of such issues, allowing timely replacement of worn components and preventing costly production delays.
For chemical processing facilities, the module is critical in agitator drives for reactor vessels. Axial thrust fluctuations in these drives may signal bearing fatigue or material buildup. By integrating with 3300/35 temperature monitors, it provides a comprehensive view of equipment health, ensuring safe operation in corrosive environments.
Related Models
3300/20-12-01-02-00-00 – Variant with hermetically sealed relays, ideal for high-humidity environments.
3300/48-02-01-00-00 – Case expansion monitor that extends system capacity for large machinery trains.
330103-00-04-10-02-00 – Proximity probe commonly paired with the 3300/20-12-01-03-00-00 for axial position measurement.
3300/12-01-20-00 – Power supply module providing 24 VDC to the 3300/20-12-01-03-00-00 in 3300 racks.
3300/22M 288055-01 – Communication gateway transmitting thrust data to enterprise systems for analytics.
Installation and Maintenance
Installing the 3300/20-12-01-03-00-00 requires a 3300 rack with an available slot. Power off the system, slide the module into place, and secure connections using shielded cables for proximity probes. Route cables away from high-voltage lines to minimize interference, and ensure the rack is grounded to ≤4Ω. Verify 24 VDC supply from the 3300/12 module before powering on.
For maintenance, inspect the module quarterly. Clean dust from vents with compressed air and check terminal connections for tightness. Use Bently Nevada’s calibration tools annually to verify measurement accuracy, especially in high-precision applications like turbine monitoring. Update firmware via 3300 Configuration Software to support new sensor types or protocol updates. With proper care, the module operates reliably for 8–10 years.
Product Warranty
The 3300/20-12-01-03-00-00 is backed by a one-year warranty from Xiamen Xiongba E-commerce Co., Ltd., covering manufacturing defects and premature failure under normal operating conditions. If the module malfunctions, Xiamen Xiongba provides free replacement, ensuring minimal disruption to your 3300 monitoring system. Their technical team, experienced in Bently Nevada’s 3300 series, offers guidance on sensor integration, calibration, and troubleshooting, leveraging direct access to genuine parts. This commitment ensures users trust the 3300/20-12-01-03-00-00 for critical thrust monitoring in industrial environments.
Company Introduction
Xiamen Xiongba E-commerce Co., Ltd. Branch specializes in the field of industrial automation, focusing on the sales of Distributed Control Systems (DCS), robot systems, and modules and spare parts for large-scale servo control systems. Our business covers a wide range of industrial automation products, including PLCs, MOTOROLA MVME industrial modules, Anybus communication converters, RTU remote modules, industrial PCs, low-frequency industrial displays, and SCSI human-machine interfaces. With over a decade of industry experience, Xiongba has grown into a global supplier of industrial automation spare parts. We source directly from overseas, offering products and parts from multiple countries and manufacturers. This helps solve customers' procurement challenges, ensures product quality, and provides a significant price advantage. We offer a one-year warranty and free replacement service.
