330101-00-36-10-02-05 | Bently Nevada Proximity Probes

Bently Nevada's 330101-00-36-10-02-05 is a 3300 XL series 8mm eddy current proximity probe. The following is a detailed description of the model analysis, technical characteristics, application scenarios, etc.:

I. Model Meaning Disassembly

330101: Fixed prefix, representing the 3300 XL series 8mm eddy current probe body, suitable for standard vibration/displacement monitoring scenarios.

Position A "00": The threadless length is 0.0 inches, that is, the probe housing is a standard non-extended thread design, and it needs to be fixed by external threaded connectors (such as mounting nuts) during installation.

Position B "36": The total length of the probe housing is 3.6 inches (about 91.44mm), which is a medium length specification and is suitable for conventional installation spaces or medium-depth installation holes.

Position C "10": The total length of the probe (including cable) is 1.0 meters (3.3 feet), that is, the overall length from the probe tip to the cable connector is 1 meter.

D position "02": The connector type is a micro coaxial ClickLoc connector, which supports quick plugging and unplugging, and is compatible with the 3300 series preamplifier and extension cable to ensure the stability of the electrical connection.

E position "05": Special configuration code (non-standard general item), which may represent the cable material, temperature resistance level or customized requirements (such as specific protective coating, oil-resistant design, etc.), and the specific meaning needs to be confirmed in conjunction with the manufacturer's documentation.

2. Core technical characteristics

1. Measurement principle and accuracy

Based on the eddy current effect, non-contact measurement of displacement changes on the surface of metal conductors, the linear measurement range is 0~2mm, the output voltage is -20V~-4V DC (typical value), and the linearity error is ≤1%, which is suitable for high-precision shaft monitoring.

The resolution can reach 1μm, which meets the real-time monitoring requirements of radial vibration, axial displacement, rotor eccentricity and other parameters of rotating machinery such as turbines and compressors.

2. Physical and environmental adaptability

Shell material: AISI 304 stainless steel, corrosion-resistant, wear-resistant, protection level IP65, can withstand industrial environments such as dust and liquid splashes.

Probe tip: Polyphenylene sulfide (PPS) insulation material, high temperature resistance (long-term working temperature - 30℃~+177℃), and stable dielectric constant to ensure that the measurement signal is not affected by temperature.

Cable characteristics: The outer layer is made of wear-resistant PVC or Teflon material, the internal coaxial shielding design, and strong anti-electromagnetic interference ability; the cable temperature range is - 55℃~+125℃, suitable for harsh working conditions (such as high temperature and oily environment).

3. System compatibility

It needs to be used with the 3300 series preamplifier (such as 330180-90-00) and the extension cable of the same specification. The total electrical length of the three must be matched (usually ≤30 meters) to ensure impedance matching (typical impedance 50Ω) and avoid signal attenuation.

3. Typical application scenarios

Industrial rotating machinery monitoring: commonly used for shaft system status monitoring of equipment such as steam turbines, fans, pumps, gearboxes, etc., for example:

Measure the radial vibration amplitude of the main shaft to determine bearing wear or rotor imbalance;

Monitor axial displacement (thrust bearing clearance) to prevent equipment damage caused by shaft system movement;

Cooperate with key phase probe to achieve synchronous measurement of rotor speed and eccentricity.

Installation scenario: Suitable for equipment with conventional installation depth (such as compressor cylinder, motor end cover), the 3.6-inch shell length can be flexibly arranged in a limited space, while meeting the vertical installation requirements of the probe and the measured surface (the clearance is recommended to be 1.0mm, that is, the midpoint of the linear range).

4. Installation and use precautions

Gap calibration:

During installation, it is necessary to ensure that the probe is perpendicular to the metal surface to be measured, and the initial gap needs to be adjusted to about 1.0mm (avoid exceeding the linear range of 0.2~1.8mm) through a calibration tool (such as a feeler gauge), otherwise it will cause nonlinear distortion of the output signal.

System matching:

The extension cable must be consistent with the electrical length of the probe and the preamplifier (e.g., the total length of the probe is 1 meter, and when it is matched with a 5-meter extension cable, the total length is 6 meters), and the models of the three must match (e.g., the preamplifier model is 330180, the extension cable model is 330130, etc.), otherwise the measurement error will be caused by impedance mismatch.

Environmental protection:

The cable wiring should be kept away from strong electromagnetic fields (such as power cables and transformers), and avoid winding or excessive bending (minimum bending radius ≥ 10 times the cable diameter) to prevent shielding layer damage or signal interference.

Maintenance points:

Regularly check whether the probe housing and cable have mechanical damage (such as cracks, wear), whether the joints are loose, and ensure that the seals are intact to maintain the IP65 protection level.