Product: 330102-00-20-10-12-05
Category: High-Temperature Proximity Transducer System (11mm Driver Style) for Extreme Environments
Overview:
The 330102-00-20-10-12-05 is a heavy-duty, 11mm diameter driver-style proximity probe system engineered by Bently Nevada for extreme service conditions, particularly very high ambient temperatures. The part number decodes to a system with a 20-foot (6.1m) integral probe cable (-20-), a 10-foot (3.05m) extension cable (-10-), and specialized high-temperature components (-12- suffix). This configuration utilizes a robust threaded driver (bushing) that is permanently mounted to the machine, providing superior mechanical stability, sealing, and thermal protection for the probe. It is the standard for critical displacement measurements in the hottest sections of major turbomachinery.
Key Parameters & Specifications
| Parameter | Specification / Description |
|---|---|
| System Type | Driver-Monitor (Bushing) Style Proximity Transducer System - High-Temperature Version. |
| Probe Diameter | 11 mm (0.433 inches) – The heavy-duty industry standard for critical machinery. |
| Driver (Bushing) Thread Size | Typically 7/8-14 UNF or M22 x 1.5. This large, threaded interface ensures a secure mount in thick casing walls. |
| Total Electrical Length | 30 feet (9.14 meters). Comprised of a 20 ft (6.1m) integral probe cable + a 10 ft (3.05m) high-temperature extension cable. |
| Linear Range | Standard: 0.25 to 2.3 mm (10 to 90 mils) from the probe tip. |
| Scale Factor (Sensitivity) | 7.87 V/mm (200 mV/mil) for standard steel targets (e.g., AISI 4140). |
| Frequency Response | 0 to 10 kHz. |
| Output Signal | -1 to -17 Vdc linear analog signal, proportional to gap. Requires a compatible proximitor (e.g., 330180). |
| Target Material | Ferrous Steel (standard). Calibration differs for stainless steel. |
| Temperature Rating (Key Feature) | Designed for Very High Temperatures. The -12- suffix indicates components (cable, connectors, probe insulation) rated for continuous ambient temperatures up to and exceeding 260°C (500°F) at the mounting location. The driver aids in heat sinking. |
| Connectors | High-temperature rated MIL-C-5015 style connectors. The system uses a male connector on the probe cable and a female on the extension cable. |
| Key Feature: Driver Assembly | The probe installs into a separate driver. This provides: 1. Thermal Mass: Protects probe electronics from rapid heat soak. 2. Mechanical Rigidity: Minimizes probe stem vibration. 3. Sealing: Often includes double O-rings for pressure/weather sealing. 4. Electrical Isolation: Isolates probe from machine ground. |
| Cable Specification | Special high-temperature, mineral-insulated (MI) or exotic fluoropolymer cables with braided armor for the integral section. The -12- suffix defines this high-temp construction. |
| Probe Tip Length | Standard or extended length to reach through the driver. |
| Dimensions & Weight | Driver: ~50-60mm long, 7/8" UNF threads. Probe Body: 11mm diameter. Weight (Probe + Driver + 20ft Cable): ~2.0 - 2.5 kg (4.4 - 5.5 lbs) due to heavy driver and armored cable. Total System Weight: ~3.0 kg (6.6 lbs) with extension cable. |
Primary Application Scenarios
High-Temperature Gas Turbine (GT) Monitoring:
The primary application. Used for radial vibration and axial (thrust) position measurements on combustion gas turbines and hot gas path sections, where casing temperatures are extreme. The 11mm driver style is often a GT OEM specification.
Steam Turbine High-Pressure/High-Temperature Sections:
Installed on steam turbines for casing expansion, differential expansion, and vibration measurements near the steam inlet and high-pressure casings.
Hot Compressor Discharge Sections:
Used on syngas compressors, cracked gas compressors, and other high-process-temperature compressors in petrochemical plants.
API 670 Compliant Critical Machinery:
The 11mm driver system is frequently specified to meet API 670 requirements for machinery protection systems in refineries and chemical plants, especially for high-temperature services.
Other Severe Service Environments:
Geothermal Power: Turbines and pumps in high-heat environments.
Aerospace Test Cells: Ground testing of jet engines.
Any application where high ambient temperature, high pressure, or corrosive atmospheres demand the most robust mechanical and thermal protection for the transducer. This includes:
Critical Note: This is a premium, application-specific transducer system. The -12- suffix is crucial and denotes the high-temperature component group. It must be powered by a compatible 3300 series Proximitor. System performance is highly dependent on correct driver installation depth and target material calibration. Always consult the Bently Nevada 3300/11mm High-Temperature Transducer Technical Data Sheet (TDS) and the system-specific calibration certificate for the exact temperature limits, material curve, and installation torque specifications before deployment.
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