Bently Nevada 330800-28-00-085-03-02 Proximity Transducer Assembly

Parameter

Specification

Model Number

330800-28-00-085-03-02

Brand / Series

Bently Nevada PROXPAC XL

System Type

Integrated housing with 3300 XL Proximitor® sensor + 3300 XL 8 mm probe

Probe Type

3300 XL 8 mm probe with 1-meter fixed triaxial cable

Linear Range

2 mm (80 mils)

Incremental Scale Factor (ISF)

7.87 V/mm (200 mV/mil) ±5%

Recommended Gap Setting

1.27 mm (50 mils)

Power Supply

-17.5 Vdc to -26 Vdc (without barriers) / -23 Vdc to -26 Vdc (with barriers)

Field Wiring Max Length

305 m (1,000 ft) – 3-conductor shielded triax cable (16–24 AWG)

Enclosure Rating

Type 4X, IP66 (BASEEFA T07/0709)

Operating Temp (Housing)

-52°C to +100°C (-62°F to +212°F)

Operating Temp (Probe Tip)

-52°C to +177°C (-62°F to +351°F)

Hazardous Area Approvals

ATEX/IECEx: Ex ia IIC T4/T5 Ga; cNRTLus: Class I, Zone 0, Groups A, B, C, D

Housing Material

UV-resistant, glass-reinforced PPS thermoplastic with conductive fibers

Probe Case Material

AISI 304 stainless steel

Total System Weight

1.44 kg (3.2 lb) typical

What is the primary advantage of a PROXPAC XL over a standard 3300 XL 5/8 mm probe system?

The PROXPAC XL integrates the probe tip and the Proximitor® sensor into a single, sealed housing. This eliminates the need for an extension cable and a separate sensor mounting enclosure. The result is a more compact, robust system with fewer connection points, which enhances reliability and simplifies installation, especially in harsh or hazardous areas.

What is the effective linear range and scale factor for this assembly?

The system provides a 2 mm (80 mil) linear range, beginning approximately 0.25 mm (10 mils) from the target. The standard incremental scale factor (ISF) is 7.87 V/mm (200 mV/mil), with an interchangeability error of only ±5% across the full range.

What certifications does the 330800-28-00-085-03-02 model hold?

The “28” option in the part number indicates Multiple Approvals. It includes ATEX/IECEx for Zone 0, 1, and 2 gas environments (Ex ia and Ex nA) and cNRTLus for Class I, II, III, Divisions 1 & 2, and Zone 0, 2. Always consult the specific certificate for detailed temperature classifications (T4/T5) and entity parameters.

Can this system be used on shaft diameters smaller than 50.8 mm (2.0 inches)?

For radial vibration measurements on shafts smaller than 76.2 mm (3.0 inches), the scale factor may change. For shaft diameters smaller than 50.8 mm (2.0 inches), the interaction between separate transducer systems (cross-talk) may exceed 50 mV.

What is the maximum allowable field wiring length between this assembly and the monitor?

You can use up to 305 meters (1,000 feet) of 3-conductor shielded triax cable (16-24 AWG) between the PROXPAC XL assembly and your monitoring system.