Bently Nevada 330881-28-00-075-03-02 PROXPAC XL Proximity Transducer

This Bently Nevada 330881-28-00-075-03-02 is a complete proximity transducer system. It monitors vibration and position in critical turbomachinery. This model comes with an IP66-rated housing for harsh environments. The device uses a 3300 XL 8 mm probe with multiple approvals. You will find this sensor ideal for steam, gas, and hydro turbines.

H3: Full Technical Specifications

The Bently Nevada 330881-28-00-075-03-02 offers precise measurements. It has a linear range of 2 mm (80 mils) . The range starts at 0.25 mm from the target. It extends from 0.25 mm to 2.3 mm (10 to 90 mils). This corresponds to -1 Vdc to -17 Vdc.

The incremental scale factor (ISF) is 7.87 V/mm (200 mV/mil). This includes a ±5% interchangeability error. The frequency response goes from 0 to 10 kHz. It has a +0, -3 dB rating with up to 305 meters of field wiring.

Key Environmental Limits:

• Probe temperature range: Operates from -51 °C to +177 °C.

• Housing rating: IP66 verified by BASEEFA.

• Power requirement: Needs -17.5 Vdc to -26 Vdc at 12 mA.

Mechanical Strength:

• Probe tensile strength: Maximum 330 N (75 lb).

• Housing impact strength: Withstands two separate 4 Joule impacts at extreme temps.

• Recommended torque for retaining nut: 29.5 N·m (260 in·lb).

Material Construction:

• Probe tip material: Polyphenylene Sulfide (PPS).

• Probe case material: AISI 304 stainless steel.

• Housing material: UV-resistant, glass-reinforced PPS thermoplastic.

• Minimum target size: 15.2 mm diameter flat target.

• Minimum shaft diameter: 50.8 mm (2.0 inches).

H3: Installation Guide

Follow these steps to install the Bently Nevada 330881-28-00-075-03-02 correctly. First, set the recommended gap to 1.27 mm (50 mils) . Use the 3/4-14 NPT mounting thread option. Tighten the probe sleeve locknut to 39.3 N·m (350 in·lb) .

Use a 3-conductor shielded triax cable for field wiring. The wire size should be 0.2 to 1.5 mm² (16 to 24 AWG). Keep the field wiring length at a maximum of 305 meters (1,000 feet) . Do not expose the probe to temperatures below -34°C. This may damage the pressure seal.

H3: Package Contents

Your package for the Bently Nevada 330881-28-00-075-03-02 includes the following items:

• One PROXPAC XL Proximity Transducer housing.

• One 3300 XL 8 mm probe with a 75mm penetration (C dimension).

• One 1-metre triaxial probe cable with FEP insulation.

• One M20 fitting and two plugs (Fittings Option 03).

• A stainless steel outer sleeve and retaining chain.

• A grounding liner with a retaining plate.

• An extra soft cellular silicone vibration isolator.

H3: Frequently Asked Questions (FAQ)

1. What is the linear range of this Bently Nevada model?
This Bently Nevada 330881-28-00-075-03-02 has a linear range of 2 mm (80 mils) . It operates from 0.25 mm to 2.3 mm from the target.

2. Can I use this transducer in a wet environment?
Yes, the housing has an IP66 rating . BASEEFA verified this rating for strong water jets and dust.

3. What is the maximum length for field wiring?
You can use up to 305 metres (1,000 feet) of field wiring. The frequency response will remain 0 to 10 kHz within -3 dB.

4. Does the probe work with small machine shafts?
The minimum shaft diameter for proper use is 50.8 mm (2.0 inches) . The minimum target size is 15.2 mm.

5. What happens if the supply voltage changes?
The supply sensitivity is very low. Output voltage changes less than 2 mV per volt of input voltage change.