High-Temperature Proximity Probe for Gas and Steam Turbine Monitoring
The Bently Nevada 330380-90-00 3300 XL 16 mm High-Temperature Probe Sensor is engineered for extreme-temperature rotating machinery applications where conventional proximity probes cannot operate reliably. As part of the 3300 XL High-Temperature Proximity System (HTPS), the probe is capable of continuous operation at temperatures up to +350°C (+662°F), making it ideal for gas turbines, steam turbines, and other high-temperature industrial equipment.
The probe uses proven eddy-current sensing technology to provide accurate, non-contact measurement of:
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Shaft vibration
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Axial (thrust) position
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Differential expansion
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Seal clearance
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Rotor-to-stator movement
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Turbine supervisory instrumentation (TSI)
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330380-90-00 |
| Product Type | 3300 XL 16 mm High-Temperature Probe |
| Series | 3300 XL High-Temperature Proximity System (HTPS) |
| Probe Diameter | 16 mm |
| Measurement Technology | Eddy-current, non-contact |
| Total Length Option | 90 = 9.0 m (30 ft) system length |
| Agency Approval | 00 = Not required |
| Probe Thread | 3/4-16 UNF |
| Maximum Probe Temperature | +350°C (+662°F) |
| Compatible Extension Cable | High-Temperature Extension Cable |
| Compatible Proximitor® Sensor | 3300 XL High-Temperature Proximitor® Sensor |
| Application | Gas turbines, steam turbines, TSI systems |
Typical Applications
The 330380-90-00 is commonly installed on:
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Gas turbines
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Steam turbines
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Industrial turbine generators
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Turbine supervisory instrumentation (TSI) systems
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High-temperature compressors
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Power generation equipment
Typical monitoring functions include:
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Shaft vibration
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Thrust position
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Differential expansion
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Rotor movement
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Seal clearance
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Mode shape analysis
Key Features
High-Temperature Operation
Designed to withstand continuous temperatures up to +350°C (+662°F), making it suitable for turbine hot-section monitoring where conventional probes cannot be used.
Non-Contact Eddy-Current Measurement
Provides highly accurate shaft displacement measurements without physical contact, eliminating mechanical wear while ensuring long-term reliability.
Rugged Industrial Construction
The probe is designed with high-temperature materials and a durable hardline construction for reliable performance in severe industrial environments.
Long System Length
The 90 configuration provides a 9.0 m (30 ft) total transducer system length, allowing installation on large turbines where longer cable runs are required.
Complete System Compatibility
The probe operates as part of the 3300 XL High-Temperature Proximity System, which includes:
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High-Temperature Probe
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High-Temperature Extension Cable
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High-Temperature Proximitor® Sensor
These components are factory calibrated for optimum accuracy and interchangeability.
Frequently Asked Questions
1. What is the primary application of the 330380-90-00?
It is used for high-temperature shaft vibration and displacement monitoring in gas turbines, steam turbines, and other critical rotating machinery.
2. What does the "90" option indicate?
It specifies a 9.0-meter (30-foot) total transducer system length.
3. What maximum temperature can the probe withstand?
The probe is rated for continuous operation up to +350°C (+662°F).
4. Which Proximitor® Sensor should be used?
It must be paired with the compatible 3300 XL High-Temperature Proximitor® Sensor supplied for the HTPS system.
5. Is the probe interchangeable with a standard 3300 XL 8 mm probe?
No. The 16 mm High-Temperature Probe is designed specifically for the 3300 XL HTPS and is not interchangeable with standard 8 mm or 11 mm transducer systems.
6. Which industries commonly use this probe?
It is widely used in:
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Power generation
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Oil & gas
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Petrochemical
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Industrial turbine manufacturing
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Heavy rotating equipment
7. Does this probe require an extension cable?
Yes. It is supplied as part of a complete 3300 XL High-Temperature Proximity System with a matching high-temperature extension cable and Proximitor® Sensor.
8. What measurements can the system perform?
The system measures shaft vibration, thrust position, differential expansion, seal clearance, rotor movement, and other critical turbine parameters.
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