Bently Nevada 330801-28-04-050-00-02 | PROXPAC® Proximity Transducer

Overview

The Bently Nevada 330801-28-04-050-00-02 is a PROXPAC® Proximity Transducer designed for precise non-contact measurement of shaft position and vibration in industrial machinery. It integrates a 3300 XL 8 mm proximity probe within a protective housing, ensuring reliable performance in harsh industrial environments.

Electrical Characteristics

Parameter	Specification
Input	Accepts 3300 XL 8 mm Proximity Probe (1-meter cable).
Power Supply	– Without barriers: -17.5 Vdc to -26 Vdc, 12 mA max. – With barriers: -23 Vdc to -26 Vdc.
Supply Sensitivity	< 2 mV change in output per volt change in input.
Output Resistance	50Ω
Probe DC Resistance	7.58 kΩ ± 0.5 kΩ
Field Wiring	Three-conductor twisted shielded cable recommended. Maximum cable length: 305 meters (1,000 feet).

Performance Specifications

Parameter	Specification
Linear Range	2.0 mm (80 mils), from 0.25 mm (10 mils) to 2.3 mm (90 mils).
Recommended Gap Setting	1.27 mm (50 mils)
Incremental Scale Factor (ISF)	7.87 mV/μm (200 mV/mil) ±5.5%, including interchangeability errors.
Deviation from Best Fit Straight Line (DSL)	±23 μm (±0.9 mil) typical, including interchangeability errors.
Temperature Stability	Over -35°C to +120°C (-30°F to +250°F), ISF remains within ±10% of 7.87 mV/μm (200 mV/mil).
Minimum Target Size	15.2 mm (0.6 in) diameter (flat target).
Minimum Shaft Diameter	50.8 mm (2 in) (recommended: 76.2 mm (3 in)).
Cross-talk Prevention	Minimum 40 mm (1.6 in) spacing for axial position transducers, 74 mm (2.9 in) for radial vibration.

Environmental Limits

Parameter	Specification
Probe Operating & Storage Temperature	-51°C to +177°C (-60°F to +350°F).
Probe Housing & Proximitor® Sensor Operating Temperature	-34°C to +100°C (-30°F to +212°F).
Storage Temperature	-34°C to +105°C (-30°F to +221°F).

Dimensions and Weight

Parameter	Specification
Shell Top Width	91.4 mm (3.6 in)
Total Height	144.8 mm (5.7 in)
Height Above Thread	25.4 mm (1.0 in)
Probe Rod Exposure Height	12.7 mm (0.5 in)
Probe Rod Small Diameter Height	1.27 mm (0.050 in)
Probe Rod Small Diameter	15.2 mm (0.60 in)
Total System Weight	1.4 kg (3.1 lb) typical with 0.3 meter (12 in) sleeve length.

Ordering Information – Bently Nevada 330801-28-04-050-00-02

Option Code	Description
A: Probe & Approvals	28 = 3300 XL 8 mm probe with multiple approvals.
B: Standoff Adapter (B Dimension)	04 = 40 mm (order in 10 mm increments).
C: Probe Penetration (C Dimension)	050 = 50 mm.
D: Fittings	00 = No fittings (includes two plugs and two washers).
E: Mounting Thread	02 = 3/4-14 NPT (required for Standoff Adapter).