Overview
Manuals
Probe Temperature Range
Mounting Accessories
Features:
- 3300 XL 25 mm Proximity Probe
- 3300 XL 25mm Proximity Transducer System
- Bently Nevada Machinery Condition Monitoring
The 3300 XL 25 mm sensor system consists of a standalone 25 mm probe, an extension cable, and a 3300 XL 25 mm proximity sensor. Its output signal of 0.787 V/mm (20 mV/mil) allows for a linear measurement range of 12.7 mm (500 mil). Based on this linear measurement range, the 3300 XL 25 mm sensor system is suitable for measuring differential expansion (DE) in medium to large steam turbine generators caused by the difference in growth rates between the turbine rotor and the generator stator (casing).
While the other sensor observes another ramp or a different location on the rotor to compensate for radial movement. This configuration introduces some measurement error, but it can measure a longer total differential expansion distance compared to complementary measurements. Criteria for selecting the mounting method include: available target size, rotor axial movement distance, and the type of DE target already present in the machine (sleeve-type or ramp-type).
The 330851-01-00-20-10-00-00 Bently Nevada 3300 XL 25 mm Proximity Probe may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 330851-01-00-20-10-00-00 3300 XL 25 mm Proximity Probe Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Operating and Storage Temperature: -35°C to +200°C (-31°F to +392°F)
Short Term Operating and Storage Temperature: +250 °C (482 °F) max for less than 24 hours
Measuring Differential Expansion (DE)
The Differential Expansion measurement is made by two proximity transducers observing a collar or ramp some distance from the thrust bearing. Typical transducer mounting arrangements are:
1.Two transducers observing the same side of a collar.
2.Two complementary input transducers observing opposite sides of a collar, effectively doubling the measurable DE range.
