Bently Nevada 330880-16-40-037-03-02 PROXPAC XL Proximity Transducer
Product Overview and Core Function
This official Bently Nevada 330880-16-40-037-03-02 provides precise shaft vibration and position monitoring. As a result, it is ideal for critical turbomachinery protection. The device belongs to the reliable 3300 XL Series for industrial applications. Specifically, this model delivers a complete PROXPAC XL proximity probe system in one housing. Consequently, you reduce installation complexity while gaining high accuracy.

Key Technical Parameters and Electrical Data
The Bently Nevada 330880-16-40-037-03-02 operates with a -17.5 Vdc to -26 Vdc power supply. For instance, it consumes only 12 mA maximum without barriers. The system delivers an Incremental Scale Factor (ISF) of 7.87 V/mm (200 mV/mil) ±5%. Therefore, this includes interchangeability error over the 80 mil range. Supply sensitivity is less than 2 mV output change per volt input change. Similarly, output resistance is a standard 50 Ω.

Materials and Mechanical Construction
The probe tip uses Polyphenylene Sulfide (PPS) material for durability. Its case features AISI 304 stainless steel for corrosion resistance. In addition, the 1-metre triaxial cable has fluoroethylene propylene (FEP) insulation. A gold-plated brass ClickLoc connector ensures a secure and reliable fit. Specifically, the outer sleeve and retaining screws use AISI 303 stainless steel. A neoprene O-ring and vibration isolation silicone protect internal parts.

Linear Range and Gap Settings
The linear range starts at approximately 0.25 mm (10 mils) from the target. For example, it extends from 0.25 mm to 2.3 mm (10 to 90 mils). As a result, this equals a signal range of –1 Vdc to –17 Vdc. The recommended gap setting is 1.27 mm (50 mils). Consequently, this gap ensures optimal performance for most machinery monitoring tasks.

Environmental Limits and Housing Ratings
The probe operates from -51°C to +177°C (-60°F to +350°F). However, note that exposing the probe below –34°C may cause seal failure. The housing has an IP66 rating verified by BASEEFA report T07/0709. On the other hand, housing impact strength meets 4 Joule impacts at -39°C and 115°C. The total system weight is 1.44 kg (3.2 lbm) with a 0.3 metre sleeve length. Probe tensile strength reaches 330 N (75 lb) between cable and case.

Frequency Response and Field Wiring Guidelines
Frequency response is 0 to 10 kHz: +0, -3 dB with up to 305 metres of field wiring. Specifically, field wiring should use 0.2 to 1.5 mm² (16 to 24 AWG) conductors. You need a 3-conductor shielded triax cable for best performance. The maximum wiring length between the sensor and monitor is 305 metres (1,000 feet). For instance, see the frequency response graph for signal rolloff at high frequencies. Therefore, always plan your cable route carefully to avoid signal degradation.

Installation Guide with Torque Specifications
Mount the probe using the 3/4-14 NPT mounting thread option. For example, tighten the retaining nut to 29.5 N·m (260 in·lb). The probe sleeve locknut requires 39.3 N·m (350 in·lb). Similarly, use the included one 3/4-14 NPT fitting and one 3/4-14 NPT to 1/2-14 NPT SST reducer. Install the two plugs as provided. Consequently, always verify the target shaft diameter is at least 50.8 mm (2.0 in). The minimum flat target size is 15.2 mm (0.6 in) diameter.

Complete Package Contents
Bently Nevada 330880-16-40-037-03-02 PROXPAC XL Proximity Transducer (1 unit)

3300 XL 8 mm probe without approvals (Option 16)

Standoff adapter, 4 inches (B Dimension 40)

Probe penetration length 37 mm (C Dimension 037)

One 3/4-14 NPT fitting

One 3/4-14 NPT to 1/2-14 NPT SST reducer

Two plugs

Mounting thread 3/4-14 NPT (Option 02)

Housing with UV-resistant PPS thermoplastic

Outer sleeve and retaining chain (AISI 304)

Grounding liner and retaining plate

Lid label (gloss radiant white polyester)

Frequently Asked Questions (FAQ)
1. What is the linear range of the Bently Nevada 330880-16-40-037-03-02?
The linear range is 2 mm (80 mils). Specifically, it starts at 0.25 mm from the target and goes to 2.3 mm.

2. Can I use this probe in high temperature areas?
Yes, the probe works from -51°C to +177°C. However, avoid long periods below -34°C to protect the pressure seal.

3. What power supply does this PROXPAC XL require?
It needs -17.5 Vdc to -26 Vdc. On the other hand, with barriers, use -23 Vdc to -26 Vdc for correct operation.

4. How do I install the 3/4-14 NPT fitting correctly?
Apply 29.5 N·m torque to the retaining nut. Similarly, use 39.3 N·m for the probe sleeve locknut. Always check the thread engagement.

5. What is the maximum cable length for field wiring?
You can run up to 305 metres (1,000 feet) of 3-conductor shielded triax cable. Consequently, this length works between the sensor and monitor.