Bently Nevada 330101-39-63-10-12-05 Reverse Mount Sensor

Bently Nevada 330101-39-63-10-12-05 3300 XL 8 mm Probe for Hazardous Area Monitoring

Product Introduction

The Bently Nevada 330101-39-63-10-12-05 belongs to the advanced 3300 XL series. This 8 mm probe uses a 3/8-24 UNF thread configuration. Many engineers rely on it for vibration and position measurements on rotating machinery. For instance, you can install it on steam turbines, gas compressors, and large pumps. Additionally, the probe includes a patented TipLoc molding method. This method creates a stronger bond between the probe tip and body.

The unthreaded length option 39 equals 3.9 inches. The overall case length option 63 equals 6.3 inches. Furthermore, the total length option 10 means a 1.0 meter (3.3 feet) probe. This shorter length works well for tight machine casings. The connector option 12 provides a Miniature coaxial ClickLoc connector with FluidLoc cable. The FluidLoc option prevents oil and liquids from leaking out through the cable interior.

The agency approval option 05 includes CSA, ATEX, and IECEx certifications. Therefore, you can safely use this probe in explosive atmospheres. Moreover, the 8 mm design offers thicker encapsulation of the probe coil in molded PPS plastic. This results in a more rugged and durable probe compared to smaller diameters.

Technical Specifications

Electrical Performance
The nominal DC resistance (RPROBE) measures from the center conductor to the outer conductor. For this 1.0-meter probe, RPROBE equals 7.59 ± 0.50 Ω. The extension cable shows a typical capacitance of 69.9 pF/m (21.3 pF/ft). For field wiring, use 0.2 to 1.5 mm² (16 to 24 AWG) three-conductor shielded triad cable with tinned wires. The maximum length between the 3300 XL Proximitor Sensor and the monitor reaches 305 meters (1,000 feet).

Linear Range and Scale Factor
The linear range covers 2 mm (80 mils). This range starts at approximately 0.25 mm (10 mils) from the target. It extends from 0.25 to 2.3 mm (10 to 90 mils), which corresponds to roughly –1 to –17 Vdc. The recommended gap setting for radial vibration is -9 Vdc [approximately 1.27 mm (50 mils)]. The Incremental Scale Factor (ISF) for a standard 1-meter system equals 7.87 V/mm (200 mV/mil) ±5%. This includes interchangeability error over the 80 mil linear range from 0°C to +45°C (+32°F to +113°F).

Deviation from Best Fit Straight Line (DSL)
For standard 1-meter systems, the DSL stays below ±0.025 mm (±1 mil) at 0°C to +45°C. This accuracy ensures reliable and repeatable measurements. Additionally, the probe shows less than a 3% change in Average Scale Factor (ASF) when tested at 93% humidity for up to 56 days under IEC standard 68-2-3.

Mechanical and Environmental Parameters

Materials and Construction
The probe tip uses Polyphenylene sulfide (PPS) material. The probe case is machined from AISI 303 or 304 stainless steel (SST). These materials offer excellent resistance to corrosion and mechanical wear. The patented CableLoc design provides 330 N (75 lbf) pull strength. This feature securely attaches the probe cable to the probe tip. Additionally, the probe weight is 323 g per meter (11.4 oz per meter). For this 1.0-meter probe, the total weight is approximately 323 g.

Temperature Ratings
The standard probe operates from -52°C to +177°C (-62°F to +350°F). For extended temperature range versions, the probe tip reaches +218°C (+425°F). The cable and connector then handle up to +260°C (+500°F). However, exposing the probe to temperatures below –34°C (–30°F) may cause premature failure of the pressure seal. Therefore, always keep the 330101-39-63-10-12-05 within its rated limits during storage and operation.

Pressure Sealing
The 3300 XL 8 mm probe seals differential pressure between the tip and case. A Viton® O-ring provides this sealing function. Bently Nevada does not pressure-test each probe before shipment. If your application requires a validated pressure seal, contact the custom design department directly.

Installation Guide

First, verify that your mounting hole has 3/8-24 UNF threads. Next, clean the mounting surface and threads thoroughly. Any dirt or debris can damage the probe or affect its sealing. Then, hand-thread the Bently Nevada 330101-39-63-10-12-05 into the hole. Turn it gently until you feel light resistance.

Do not use pliers or wrenches on the probe case. Overtightening may strip the threads or crack the PPS tip. After hand-tightening, use a torque wrench only on the hex section. The recommended torque is 1.4 to 2.2 Nm (12 to 20 in-lb). Meanwhile, avoid bending the cable sharply near the connector. Sharp bends can damage the internal conductors.

Finally, connect the Miniature ClickLoc connector to your extension cable. Listen for a firm click to confirm full engagement. For optimal performance, route the cable away from high-voltage lines and heat sources. Additionally, secure the cable with appropriate clips to prevent vibration damage.

Packaging List

• Bently Nevada 330101-39-63-10-12-05 probe assembly (1.0 meter total length)

• Miniature coaxial ClickLoc connector with FluidLoc cable (pre-installed)

• Printed installation instruction sheet

Note: No calibration certificate or warranty documents are included in this package.

Shipping Information

We ship all orders worldwide via FedEx, UPS, or DHL. Delivery typically takes 3–7 business days depending on your location.

Frequently Asked Questions (FAQ)

1. What approvals does the -05 option provide?
The -05 approval option includes CSA, ATEX, and IECEx certifications. Therefore, you can install the Bently Nevada 330101-39-63-10-12-05 in hazardous areas with explosive gas or dust atmospheres.

2. Can I use this probe without the FluidLoc cable?
Yes, the FluidLoc option prevents oil leakage through the cable interior. However, if your machine does not have oil exposure, you may order a version without FluidLoc. For this specific model 330101-39-63-10-12-05, FluidLoc is included as shown by the -12 connector option.

3. What is the advantage of the 8 mm probe over smaller sizes?
The 8 mm probe provides thicker PPS encapsulation around the probe coil. This makes it more rugged and resistant to physical abuse. The larger case diameter also offers stronger mechanical robustness compared to 5 mm or 3 mm probes.

4. How do I clean the probe tip before installation?
Use a soft, lint-free cloth with isopropyl alcohol. Gently wipe the PPS tip and the stainless steel case. Avoid abrasive pads or strong solvents. Never submerge the probe in any cleaning liquid.

5. What happens if I exceed the maximum field wiring length?
Exceeding 305 meters (1,000 feet) between the Proximitor Sensor and the monitor can cause signal rolloff at high frequencies. This may reduce measurement accuracy. Therefore, always stay within the recommended maximum length.