Bently Nevada 330881-28-10-112-03-02 PROXPAC XL Proximity Transducer

Technical Specifications Electrical Parameters

• Power Requirement: Needs -17.5 Vdc to -26 Vdc without barriers. Maximum current consumption is 12 mA.

• Linear Range: Provides 2 mm (80 mils) of usable measurement. The range starts at 0.25 mm from the target.

• Incremental Scale Factor (ISF): Delivers 7.87 V/mm (200 mV/mil) ±5%. This applies from 0°C to +45°C.

• Frequency Response: Covers 0 to 10 kHz with +0, -3 dB. Works with up to 305 metres of field wiring.

• Output Resistance: Fixed at 50 Ω for stable signal transmission.

• Supply Sensitivity: Shows less than 2 mV output change per volt of input change.

Mechanical & Environmental Limits

• Probe Tip Material: Made of Polyphenylene Sulfide (PPS) for harsh conditions.

• Probe Case Material: Uses AISI 304 stainless steel to resist rust and damage.

• Housing Rating: Achieves IP66 rating verified by BASEEFA report T07/0709.

• Probe Temperature Range: Operates from -51°C to +177°C (-60°F to +350°F).

• Housing Impact Strength: Certified to withstand two separate 4 Joule impacts at extreme temperatures.

• Total System Weight: Typical weight is 1.44 kg (3.2 lbm) with a 0.3 metre sleeve.

• Probe Tensile Strength: Supports up to 330 N (75 lb) between probe cable and case.

Physical Dimensions & Options

• Standoff Adapter (B Dimension): Set to 100 mm for correct positioning.

• Probe Penetration (C Dimension): Fixed at 112 mm total length.

• Mounting Thread: Uses 3/4-14 NPT as required for the standoff adapter.

• Fittings Option: Includes one M20 fitting and two plugs.

• Probe Cable: Features a 1-metre length, 75 Ω triaxial cable with FEP insulation.

• Probe Connector: Equipped with a gold-plated brass ClickLoc connector.

• Sleeve Material: Made from AISI 304 stainless steel for long service life.

• Vibration Isolation: Uses extra soft cellular silicone material.

Installation Guide

Follow these steps to install the Bently Nevada 330881-28-10-112-03-02 correctly.

1. Prepare the mounting hole: Ensure threads match the 3/4-14 NPT option.

2. Set the recommended gap: Adjust the probe to a 1.27 mm (50 mils) gap from the target.

3. Tighten the retaining nut: Apply 29.5 N·m (260 in·lb) of torque.

4. Secure the probe sleeve locknut: Apply 39.3 N·m (350 in·lb) of torque.

5. Connect field wiring: Use a 3-conductor shielded triax cable. Maximum length is 305 metres.

6. Verify power supply: Confirm voltage is between -23 Vdc and -26 Vdc with barriers.

Packaging List

• 1 x PROXPAC XL proximity transducer assembly (Model 330881-28-10-112-03-02)

• 1 x 3300 XL 8 mm probe with multiple approvals (Option 28)

• 1 x Standoff adapter (100 mm B dimension)

• 1 x M20 fitting and two plugs (Fittings Option 03)

• 1 x Mounting thread adapter (3/4-14 NPT)

• 1 x Printed quick-start installation guide

• 1 x Gold-plated brass ClickLoc connector (pre-attached to cable)

Frequently Asked Questions (FAQ)

Q1: What is the difference between model 330881-28-10-112-03-02 and the 142 version?
A1: The only difference is the probe penetration (C dimension). This model has 112 mm, while the other has 142 mm.

Q2: Can this transducer work in very cold environments?
A2: Yes, the probe operates down to -51°C. However, avoid temperatures below -34°C to protect the pressure seal.

Q3: What is the minimum shaft diameter for this proximity probe?
A3: The Bently Nevada 330881-28-10-112-03-02 requires a minimum shaft diameter of 50.8 mm (2.0 inches).

Q4: How do I avoid losing linear range on this device?
A4: Never operate at a more positive voltage than -23.5 Vdc. Staying within -23 Vdc to -26 Vdc ensures full linear range.

Q5: Is the housing suitable for outdoor installations?
A5: Absolutely. The housing carries an IP66 rating, making it fully dust-tight and protected against strong water jets.