Bently Nevada 330103-00-04-10-01-00 Proximity Probe

The 330103-00-04-10-01-00 belongs to the 3300 XL 8 mm series of unarmored eddy-current proximity probes. This sensor measures radial vibration and axial position on steam turbines, compressors, and large motors. Its M10 × 1 mounting thread and 8 mm tip suit standard bearing housings.

Technical Specifications

Parameter	Value
Model	330103-00-04-10-01-00
Category	3300 XL 8 mm Proximity Probe (Unarmored)
Probe Tip Diameter	8 mm
Linear Range	0 to 2 mm (typical)
Incremental Scale Factor	7.87 V/mm ± 6.5%
Frequency Response	0 to 10 kHz
Operating Temperature	-35°C to +177°C (probe)
Cable Length	0.4 m
Weight	Approx. 0.16 kg (probe with cable)
Connector	Coaxial, 3-pin Mil-spec
Mounting Thread	M10 × 1
Power Supply	-17.5 Vdc to -26 Vdc
Output Impedance	50 Ω nominal
Part Count	Single probe assembly

Measurement Principle and Interface

Eddy-current technology enables non-contact displacement measurement on ferrous targets. The driver sends a high-frequency signal through the coaxial cable to the probe coil. Subsequently, target movement modulates coil impedance and produces a proportional voltage output. The 330103-00-04-10-01-00 pairs with 3300 XL extension cables and Proximitor drivers for signal conditioning.

Installation and System Integration

Operators mount the probe through an M10 × 1 threaded hole with a locknut. A minimum target size of 20 mm diameter ensures accurate linear response. Meanwhile, the unarmored cable offers greater flexibility for tight routing paths. This design simplifies installation inside cramped bearing housings. The system also supports reverse-mount configurations for confined spaces.

Energy Storage and Power Considerations

The Proximitor driver draws power from a -24 Vdc rail, typically 12 mA maximum. No internal battery or capacitor stores energy in the probe itself. Instead, external modules handle signal demodulation and power regulation. Therefore, system designers must budget for a dedicated DC supply per channel.