The 3300 XL 25 mm Proximity Probe Bently Nevada 330851-02-000-080-10-00-00 is a key component of the 3300 XL 25 mm Transducer System, which includes a 25 mm probe, an extension cable, and a Proximitor Sensor. This system is designed to measure differential expansion (DE) in large steam turbine generators, making it ideal for applications where there is a significant difference in growth rates between the turbine rotor and the machine stator. The 0.787 V/mm (20 mV/mil) output of the Bently 3300 XL 25 MM 330851-02-000-080-10-00-00 provides a linear measurement range of 12.7 mm (500 mils), ensuring high precision for DE measurements.

In typical applications, the Bently Proximity Probe Bently Nevada 330851-02-000-080-10-00-00 is used to observe differential expansion through two proximity transducers positioned to measure changes in a collar or ramp located away from the thrust bearing. One standard mounting arrangement involves two transducers observing the same side of a collar, while another option uses complementary input transducers to observe opposite sides, effectively doubling the measurable DE range.

Additionally, the 330851-02-000-080-10-00-00 3300 XL 25 mm Proximity Probe Bently Nevada can measure longer DE distances with a configuration that places one transducer on a rotor ramp and the second on a separate location. While this configuration may introduce some error, it allows for a longer total measurement range.

The Sensor Proximity Probe Cable 330851-02-000-080-10-00-00 features a M30x2 thread, with a maximum unthreaded length of 224 mm (8.9 in), and offers flexibility with a 1.0-meter (3.3 feet) cable length. It has no armor or additional approvals, and is built to be shipped from Xiamen, China. The compact shipping size of 20.5 cm x 22.4 cm x 3.3 cm, along with its lightweight design of 0.1 kg, makes it easy to handle and install.