Bently Nevada 21508-02-12-05-02

Ordering Information

Part Number: 21508-02-12-05-02

Series: 3300 XL Proximity Probe System

Probe Tip Diameter: 8 mm (0.315 in) carbide sensing face

Probe-Nose Length Code (“02”): 2 mm (0.08 in) from shoulder to tip

Cable Length Code (“12”): 12 m (39.4 ft) PVC-jacketed, braided-shield cable

Jacket Variant (“05”): Standard PVC

Connector Kit (“02”): Factory-installed 10-pin mini-DIN

Mounting Thread: 3/8-24 UNF standard

Technical Parameters

Linear Range: 2 mm (80 mils) full-scale for Bently Nevada 21508-02-12-05-02

Sensitivity: 200 mV/mil (7.87 mV/µm) ± 5 % at –23 V DC excitation in Bently Nevada 21508-02-12-05-02

Output Span: –2 V to –18 V over linear range

Linearity: ± 1 % of full-scale

Frequency Response: DC to 10 kHz (–3 dB)

Operating Temperature: –35 °C to +125 °C (probe); –20 °C to +80 °C (PVC cable)

Environmental Seal: IP65 when mated to connector

Pressure Rating: Requires bulkhead or thermowell for pressurized applications

Product function

Converts minute air-gap variations via Bently Nevada 21508-02-12-05-02 between probe tip and rotating target into proportional AC voltage. The impedance-matched cable preserves signal fidelity over extended runs, delivering output to Proximitor® modules for linearization and real-time analysis.

Application Areas

Steam & Gas Turbines: Bearing clearance and rub detection with Bently Nevada 21508-02-12-05-02 in large-footprint installations

Centrifugal Compressors & Pumps: Remote shaft-position feedback for surge control

Large Motors & Generators: End-winding vibration monitoring

OEM Skid-Mounted Panels: Factory-installed harnesses in packages featuring Bently Nevada 21508-02-12-05-02

Test & Calibration Rigs: Bench-scale testing with flexible probe placement