Bently Nevada 330880-16-35-036-00-02 PROXPAC XL Proximity Transducer

Product Overview

The 330880-16-35-036-00-02 is a complete PROXPAC XL proximity measurement system. This unit uses a 3300 XL 8 mm probe without approvals. Therefore, users can deploy this model in non-hazardous industrial environments. The 330880-16-35-036-00-02 monitors radial vibration and position on rotating machinery. As a result, this transducer protects steam turbines, compressors, and large pumps from damage.

Technical Specifications

Probe Configuration and Options

This model uses probe and approvals option 16 for the sensor. Therefore, the 330880-16-35-036-00-02 carries a 3300 XL 8 mm probe without any approvals. The standoff adapter option B is 35, which equals 350 mm in length. Probe penetration option C measures 036, meaning 36 mm of exposed probe length. Consequently, this configuration suits deep mounting applications where extra reach is necessary.

Fittings and Mounting Details

The 330880-16-35-036-00-02 uses fittings option 00 for the assembly. This means no fittings are included; only two plugs and two washers. Mounting thread option is 02, which is 3/4-14 NPT standard thread. This mounting thread is required when ordering the standoff adapter option. For this reason, users must verify thread compatibility before installation.

Linear Range and Measurement Performance

This proximity transducer offers a linear range of 2 mm (80 mils). The linear range begins at approximately 0.25 mm from the target surface. Therefore, useful measurement spans from 0.25 mm to 2.3 mm of gap distance. The recommended gap setting is 1.27 mm (50 mils) for optimal performance. Incremental Scale Factor (ISF) measures 7.87 V/mm or 200 mV/mil. This value includes a ±5% interchangeability error across the full range. Accordingly, the 330880-16-35-036-00-02 delivers consistent and repeatable measurements.

Temperature Limits and Environmental Protection

The probe operates from -51°C to +177°C for wide application coverage. However, exposure to temperatures below -34°C may cause premature pressure seal failure. The housing carries an IP66 rating verified by BASEEFA report T07/0709. This housing withstands two separate 4 Joule impacts at -39°C and +115°C. In addition, CSA verified a 7 Joule impact at room temperature. For this reason, the 330880-16-35-036-00-02 suits harsh industrial environments.

Electrical Specifications and Power Requirements

This transducer requires -17.5 Vdc to -26 Vdc without barriers. Maximum current consumption is 12 mA during normal operation. When using barriers, the supply range changes to -23 Vdc to -26 Vdc. Operation above -23.5 Vdc may reduce the available linear range. Supply sensitivity stays below 2 mV change per volt of input change. Output resistance is fixed at 50 Ω for consistent signal transmission.

Field Wiring and Frequency Response

Field wiring uses 0.2 to 1.5 mm² (16 to 24 AWG) copper conductors. The 330880-16-35-036-00-02 recommends 3-conductor shielded triax cable. Tinned field wiring provides the best long-term reliability. Maximum wiring length reaches 305 metres (1000 feet) between sensor and monitor. Frequency response spans 0 to 10 kHz with +0, -3 dB rolloff. Signal rolloff occurs at high frequencies when using longer field wiring lengths. Therefore, keep wiring as short as practical for best high-frequency response.

Target and Shaft Requirements

Minimum target size is 15.2 mm diameter for a flat target surface. The smallest shaft diameter accepted is 50.8 mm (2.0 inches). Consequently, the 330880-16-35-036-00-02 works with most industrial rotating equipment. Deviation from best fit straight line (DSL) stays below ±0.025 mm. This precision applies from 0°C to +45°C for a standard 1 metre system.

Mechanical Construction and Materials

The probe tip uses Polyphenylene Sulfide (PPS) for chemical resistance. Probe case material is AISI 304 stainless steel for durability. The probe cable measures 1 metre in length with 75 Ω triaxial construction. Cable insulation uses fluoroethylene propylene (FEP) for high temperature tolerance. The probe connector is gold-plated brass with ClickLoc* design. Housing material is UV-resistant, glass-reinforced PPS with conductive fibers. Sleeve material and retaining chain are AISI 304 stainless steel. Outer sleeve and retaining screws use AISI 303 stainless steel. Vibration isolation uses extra soft cellular silicone material. As a result, the 330880-16-35-036-00-02 withstands severe mechanical stress.

Strength Ratings and Torque Specifications

Probe tensile strength reaches 330 N (75 lb) between cable and case. The housing supports 912 N (205 lbf) on a test stand configuration. Recommended torque for the retaining nut is 29.5 N·m (260 in·lb). Probe sleeve locknut requires 39.3 N·m (350 in·lb) of tightening force. Accordingly, follow these torque values to prevent mechanical damage.

Installation Guidelines

Mount the 330880-16-35-036-00-02 on a clean, flat target surface. First, verify the shaft diameter meets the 50.8 mm minimum requirement. Then, install the 3/4-14 NPT mounting thread into the prepared hole. Tighten the retaining nut to 29.5 N·m using a calibrated torque wrench. Next, set the probe gap to the recommended 1.27 mm distance. Use a voltage meter to confirm the output between -1 Vdc and -17 Vdc. Connect field wiring using 3-conductor shielded triax cable only. Finally, secure the probe sleeve locknut to 39.3 N·m of torque.

Package List

• 1 x 330880-16-35-036-00-02 PROXPAC XL Transducer assembly

• 1 x 3300 XL 8 mm probe without approvals (pre-installed)

• 1 x Standoff adapter (350 mm length)

• 2 x Plugs only (no fittings)

• 2 x Washers

• 1 x Gold-plated brass ClickLoc* connector on probe

• 1 x 1-metre triaxial probe cable (FEP insulated)

• 1 x Neoprene sleeve O-ring

• 1 x AISI 304 stainless steel grounding liner

• 1 x Retaining plate and retaining chain

Frequently Asked Questions (FAQ)

1. Does the Bently Nevada 330880-16-35-036-00-02 carry any safety approvals?
No, this model uses probe option 16 which has no approvals. Therefore, use this 330880-16-35-036-00-02 only in non-hazardous areas.

2. What is the purpose of the 350 mm standoff adapter on this model?
The 350 mm standoff allows the probe to reach deep mounting locations. Consequently, this 330880-16-35-036-00-02 suits applications with thick housing walls.

3. What fittings come with this PROXPAC XL transducer?
Fittings option 00 means no fittings are included. However, two plugs and two washers are provided for sealing unused ports.

4. Can I use this probe with a shaft smaller than 50.8 mm diameter?
No, the minimum shaft diameter is 50.8 mm for proper linear range performance. Smaller shafts may cause measurement errors.

5. What is the maximum field wiring length for the 330880-16-35-036-00-02?
Maximum wiring length reaches 305 metres between sensor and monitor. However, signal rolloff occurs at high frequencies with longer cables.