Measurement Performance Parameters

• Linear Range: [2 mm (80 mils)] . This range starts at approximately 0.25 mm (10 mils) from the target and extends to 2.3 mm (90 mils) , corresponding to an output of approximately -1 Vdc to -17 Vdc.

• Recommended Gap Setting: [1.27 mm (50 mils)]

• Incremental Scale Factor (ISF): [7.87 V/mm (200 mV/mil) ±5%] . This value includes interchangeability error, measured in 0.25 mm increments over 0°C to +45°C.

• Deviation from Best Fit Straight Line (DSL): Less than [±0.025 mm (±1 mil)] . This accuracy applies to a standard 1-meter system from 0°C to +45°C.

• Frequency Response: [0 to 10 kHz: +0, -3 dB] . This response supports field wiring up to 305 meters (1000 feet) .

• Minimum Target Size: [15.2 mm (0.6 in)] diameter (flat target)

• Minimum Shaft Diameter: [50.8 mm (2.0 in)]

Electrical Specifications

• Power Requirement: Requires -17.5 Vdc to -26 Vdc without barriers at 12 mA maximum. Requires -23 Vdc to -26 Vdc with barriers. Operation above -23.5 Vdc reduces the linear range.

• Supply Sensitivity: Output voltage changes less than 2 mV per volt change in input voltage.

• Output Resistance: [50 Ω]

• Field Wiring: Recommend 0.2 to 1.5 mm² (16 to 24 AWG) 3-conductor shielded triax cable. Maximum length between sensor and monitor is 305 meters (1000 feet) .

Environmental Limits

• Probe Temperature Range: Operating temperature [ -51°C to +177°C (-60°F to +350°F)] . Note: Exposing the probe below -34°C (-29°F) may cause premature failure of the pressure seal.

• Housing Rating: [IP66] verified by BASEEFA report T07/0709.

• Housing Impact Strength: BASEEFA certified to withstand two separate 4 Joule (5.4 ft·lb) impacts at -39°C and 115°C. CSA verified samples withstand a 7 Joule (9.5 ft·lb) impact at room temperature.

Mechanical Material Specifications

• Probe Tip Material: [Polyphenylene Sulfide (PPS)]

• Probe Case Material: [AISI 304 stainless steel]

• Probe Cable: 1-meter length, 75 Ω triaxial, FEP insulated

• Probe Connector: [Gold-plated brass ClickLoc®]

• Probe Tensile Strength: Maximum [330 N (75 lb)] between probe cable and case

• Housing Material: [UV resistant, glass-reinforced PPS thermoplastic] with conductive fibers

• Sleeve Material & Retaining Chain: [AISI 304 stainless steel]

• Outer Sleeve & Retaining Screws: [AISI 303 stainless steel]

• Sleeve O-Ring Material: [Neoprene]

• Grounding Liner & Retaining Plate Material: [AISI 304 stainless steel]

• Vibration Isolation Material: [Extra Soft Cellular Silicone]

• Lid Label Material: [Gloss Radiant White Polyester]

Recommended Torque

• Retaining Nut: [29.5 N·m (260 in·lb)]

• Probe Sleeve Locknut: [39.3 N·m (350 in·lb)]

Housing Strength Typical Value

The outer sleeve was mounted horizontally on a test stand. The housing mounted on the outer sleeve through an end hole. The housing supported [912 N (205 lbf)] placed approximately 38 mm from the unsupported end with the cover fastened and grounding liner installed.

Installation Guide

Follow these steps to correctly install the 330881-16-05-070-00-02 system.

1. Prepare the mounting thread
   This model uses the [3/4-14 NPT] mounting thread option (code 02). The package includes two plugs and two washers (fittings option 00).

2. Install the standoff adapter
   B dimension code 05 represents a standoff adapter length of [50 mm] . Install this adapter between the mounting thread and the probe.

3. Set the probe penetration depth
   C dimension code 070 represents a probe penetration length of [70 mm] . Verify this length matches your machinery casing thickness.

4. Adjust the probe gap
   Use a micrometer or a dedicated gap setting tool. Set the distance between the probe tip and the target surface to [1.27 mm (50 mils)] .

5. Connect the cable
   Insert the [ClickLoc® connector] into the corresponding proximitor port and tighten it. Use 3-conductor shielded triax cable for field wiring, up to 305 meters.

6. Grounding requirements
   The [AISI 304 stainless steel] grounding liner must connect reliably to the system ground. Single-point grounding prevents ground loops.

7. Tighten to torque specifications
   Tighten the retaining nut to [29.5 N·m] . Tighten the probe sleeve locknut to [39.3 N·m] .

Package Contents

Each 330881-16-05-070-00-02 package includes the following items:

• 3300 XL 8 mm probe × 1 (without approvals, option 16)

• 50 mm standoff adapter × 1

• Plastic plugs × 2

• Washers × 2

• Probe installation manual (English) × 1

Note: This list does not include any certification documents. It does not include a 12-month warranty clause. The package contains no FedEx, UPS, or DHL shipping labels.

Frequently Asked Questions (FAQ)

1. Can the 330881-16-05-070-00-02 measure non-conductive targets?

No. The 330881-16-05-070-00-02 uses eddy current原理 and measures only conductive metal targets. Target conductivity and permeability affect the scale factor. We recommend AISI 4140 steel or equivalent material for calibration.

2. What is the purpose of the 50 mm standoff adapter?

The [50 mm] standoff adapter (B dimension code 05) spaces the probe further from the mounting surface. This configuration suits machinery with thick casings or limited internal clearance.

3. Does the probe require special handling in high-temperature environments?

The probe operates up to [+177°C] . However, temperatures below -34°C may cause premature pressure seal failure. Always verify your machine’s ambient temperature stays within this range before installation.

4. How do I know if the sensor works within the recommended linear range?

The linear range starts at 0.25 mm (10 mils) , corresponding to approximately -1 Vdc output. Use a multimeter to measure the output voltage. A voltage between -1 Vdc and -17 Vdc indicates the probe operates in the linear zone.

5. Does this model include the proximitor?

No. The 330881-16-05-070-00-02 is the probe only. You need to order a separate 3300 XL Proximitor Sensor to form a complete measurement system.

Conclusion

The Bently Nevada 330881-16-05-070-00-02 provides reliable eddy current displacement monitoring for critical rotating machinery. Its [2 mm] linear range and [0-10 kHz] frequency response cover most shaft vibration applications. The 50 mm standoff adapter enables installation in deeper casings. The IP66-rated housing and wide temperature range suit harsh industrial environments. For bulk orders or complete system configuration advice, please contact our sales team through the online form.