Bently Nevada 330101-00-48-50-02-05 8mm Probe

Bently Nevada 330101-00-48-50-02-05 3300 XL 8 mm Probe for Long-Reach Hazardous Area Monitoring

Product Introduction

The Bently Nevada 330101-00-48-50-02-05 comes from the reliable 3300 XL series. This 8 mm probe features a 3/8-24 UNF thread configuration. Many maintenance teams choose it for vibration and position monitoring on large rotating equipment. For example, you can install it on industrial compressors, gas turbines, and hydroelectric generators. Additionally, the probe incorporates patented TipLoc molding technology. This method creates a much stronger bond between the probe tip and the probe body.

The unthreaded length option 00 means 0.0 inches. The overall case length option 48 equals 4.8 inches. Furthermore, the total length option 50 provides 5.0 meters (16.4 feet). This longer reach allows installation when the monitoring rack sits far from the machine. The connector option 02 supplies a Miniature coaxial ClickLoc connector with standard cable. Note that this model does not include the FluidLoc cable option.

The agency approval option 05 includes CSA, ATEX, and IECEx certifications. Therefore, you can safely deploy this probe in explosive atmospheres. Moreover, the 8 mm design offers thicker PPS encapsulation around the probe coil. This results in a more rugged probe that withstands physical abuse better than smaller diameter sensors.

Technical Specifications

Electrical Performance
The nominal DC resistance (RPROBE) measures from the center conductor to the outer conductor. For this 5.0-meter probe, RPROBE equals 8.73 ± 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 this standard 5-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 5-meter systems, the DSL stays below ±0.025 mm (±1 mil) at 0°C to +45°C. This accuracy ensures dependable 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 provide excellent corrosion resistance and mechanical strength. The patented CableLoc design provides 330 N (75 lbf) pull strength. This feature securely attaches the probe cable to the probe tip. Furthermore, the probe weight is 323 g per meter (11.4 oz per meter). For this 5.0-meter probe, the total weight is approximately 1.61 kg.

Thread Specifications
The probe case thread is 3/8-24 UNF. The maximum length of thread engagement equals 0.563 inches (14.3 mm). Always verify that your mounting hole matches these dimensions before installation. Using incorrect threads can damage both the probe and the machine casing.

Temperature Ratings for Hazardous Areas
The standard probe operates from -52°C to +177°C (-62°F to +350°F). However, for EPL Ga and Gc hazardous area classifications, the temperature classification depends on the ambient temperature. For T1 classification, the ambient range is -55°C to +232°C. For T2, it is -55°C to +177°C. For T3, it is -55°C to +120°C. For T4, it is -55°C to +80°C. For T5, it is -55°C to +40°C.

For EPL Dc (dust environments), different temperature classifications apply. T280°C allows -55°C to +232°C ambient. T225°C allows -55°C to +177°C. T170°C allows -55°C to +120°C. T130°C allows -55°C to +80°C. T105°C allows -55°C to +100°C. T90°C allows -55°C to +40°C. Always match the classification to your specific hazardous area requirements.

Pressure Sealing and Humidity
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. Meanwhile, the probe maintains accuracy in humid environments. Exposing the probe to temperatures below –34°C (–30°F) may cause premature failure of the pressure seal.

Installation Guide

First, verify that your mounting hole has 3/8-24 UNF threads. Next, measure the thread engagement depth. It must not exceed 0.563 inches. Then, clean the mounting surface and threads thoroughly. Any contamination can affect sealing and measurement accuracy.

After cleaning, hand-thread the Bently Nevada 330101-00-48-50-02-05 into the hole. Turn it gently until you feel light resistance. Do not use tools on the probe case directly. Overtightening may strip the threads or damage the PPS tip. Once hand-tight, 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 standard 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 every 30 cm to prevent vibration damage.

Packaging List

• Bently Nevada 330101-00-48-50-02-05 probe assembly (5.0 meters total length)

• Miniature coaxial ClickLoc connector with standard 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 for this probe?
The -05 approval option includes CSA, ATEX, and IECEx certifications. Therefore, you can install the Bently Nevada 330101-00-48-50-02-05 in hazardous areas with explosive gas or dust atmospheres. Always check the temperature classification table for your specific ambient conditions.

2. Why does this model use standard cable instead of FluidLoc?
The connector option -02 specifies a standard Miniature coaxial ClickLoc cable without FluidLoc. Choose this option when your machine does not have oil leakage through the cable interior. For oil-filled machines, select the -12 FluidLoc option instead.

3. What is the maximum thread engagement depth for this probe?
The maximum length of thread engagement is 0.563 inches (14.3 mm). Exceeding this depth can damage the probe tip or the internal coil. Therefore, always verify your mounting hole depth before installation.

4. Can I use this 5.0-meter probe with an extension cable?
Yes, you can add a 3300 XL extension cable to reach longer distances. However, the total system length (probe plus extension) must not exceed 9.0 meters for standard systems. For longer runs, consult the frequency response graphs for signal rolloff information.

5. What happens if I expose the probe to temperatures below -34°C?
Exposure below -34°C (-30°F) may damage the internal Viton® pressure seal. This damage can cause premature failure and leakage. Therefore, always keep the probe within its rated operating temperature range. For colder environments, consider special low-temperature options from the custom design department.