Bently Nevada 330702-00-24-50-12-05 Armored Probe

Bently Nevada 330702-00-24-50-12-05 3300 XL 11 mm Armored Proximity Probe

Product Introduction

The Bently Nevada 330702-00-24-50-12-05 belongs to the 3300 XL series of 11 mm proximity probes and includes stainless steel armor for enhanced durability. Engineers commonly select this armored version for applications where the cable faces abrasion, impact, or harsh physical contact. This model offers a 5.0 meter total length with a 1/2-20 UNF thread and a 2.4 inch overall case length. Its miniature coaxial ClickLoc connector delivers a secure and reliable signal connection, while the FluidLoc cable construction adds moisture resistance. The probe tip uses Polyphenylene sulfide (PPS), which resists chemicals and wear effectively. Additionally, the case is machined from AISI 304 stainless steel, and the armor provides an extra layer of protection. With multiple agency approvals, this probe meets global industrial safety standards. Its 75Ω triaxial FEP cable maintains signal integrity over long distances. This sensor works exclusively with the five-meter Proximitor sensor for optimal system performance.

Key Technical Specifications

The Bently Nevada 330702-00-24-50-12-05 delivers accurate and repeatable measurements even in tough conditions. Its probe tip material is PPS, which offers excellent dimensional stability. The case material is AISI 304 SST, while the armor adds mechanical ruggedness. The probe cable is a 75Ω triaxial type with FEP insulation, rated for total lengths of 1, 5, or 9 meters. This particular model comes with a 5.0-meter cable. The DC resistance from the center conductor to the outer conductor measures 7.2 ± 0.8 ohms. Furthermore, the operating and storage temperature range spans from -51°C to +177°C. However, note that exposing the probe to temperatures below -34°C may reduce the pressure seal's service life. The probe case thread is 1/2-20 UNF, with a maximum thread engagement length of 0.750 inches. The maximum rated torque for the case is 45.2 N•m, while the recommended torque is 15.2 N•m. For connector-to-connector connections, finger-tight is recommended, and the maximum torque is 0.565 N•m. Additionally, the minimum bend radius for the cable is 25.4 mm, which applies whether the armor is present or not.

Mechanical and Environmental Ratings

This armored probe handles differential pressure sealing via a Viton O-ring between the tip and case. Although Bently Nevada does not pressure-test each unit before shipment, the design effectively seals against process pressure. The probe's pressure rating applies to static and dynamic conditions typical in compressor and turbine applications. Its temperature rating of -51°C to +177°C covers most industrial environments. Moreover, the armor provides extra resistance against physical damage, making it suitable for retrofit projects or locations with limited clearance. The unthreaded length option is 0 inches, and the overall case length is 2.4 inches. The total length option is 5.0 meters, which matches the five-meter Proximitor sensor requirement. Therefore, do not use this probe with shorter or longer Proximitor models. The probe cable's FEP insulation resists high temperatures and chemicals, ensuring long-term reliability. Its triaxial design reduces electromagnetic interference, improving measurement accuracy. The connector type is a miniature coaxial ClickLoc, which locks positively to prevent accidental disconnection.

Installation Guidelines

Proper installation of the Bently Nevada 330702-00-24-50-12-05 ensures accurate readings and long service life. First, clean the mounting surface and threads thoroughly before installation. Apply a suitable anti-seize compound to the 1/2-20 UNF threads to prevent galling. Next, thread the probe into the mounting hole by hand until finger-tight. Then, use a torque wrench to tighten it to the recommended 15.2 N•m. Do not exceed the maximum torque of 45.2 N•m, as this could damage the case or threads. For the connector, tighten it finger-tight only, with a maximum of 0.565 N•m. Ensure the cable bend radius stays above 25.4 mm to avoid damaging the internal conductors. Additionally, route the cable away from high-voltage wires and heat sources. Secure the cable using appropriate clamps or ties, but do not overtighten. When installing multiple probes, maintain adequate spacing to avoid cross-talk. Finally, connect the probe to its compatible five-meter Proximitor sensor. Verify the air gap using a calibration fixture before startup. After installation, perform a system check to confirm output voltage matches the target gap.

Packaging List

Each package of the Bently Nevada 330702-00-24-50-12-05 includes the following items:

• 3300 XL 11 mm Armored Proximity Probe (assembly with 5.0 m cable)

• Miniature coaxial ClickLoc connector (pre-installed on cable)

• FluidLoc cable (integral part of assembly)

• Installation instruction sheet (quick start guide)

• Anti-static protective bag for storage

Note: Calibration certificates and warranty documents are not included in the package. Please request them separately if needed.

Shipping Information

We ship all orders via FedEx, UPS, or DHL depending on your location and preference. Each probe is carefully packed in anti-static and shock-absorbent materials to prevent transit damage. Tracking numbers are provided within 24 hours of dispatch. International shipping typically takes 3–7 business days. Expedited options are available upon request.

Frequently Asked Questions (FAQ)

1. What is the difference between the 330702-00-24-50-12-05 and the non-armored version?
The Bently Nevada 330702-00-24-50-12-05 includes stainless steel armor over the cable, providing extra mechanical protection against abrasion, impact, and crushing. The non-armored version lacks this protective layer.

2. Can I use this armored probe with a 9-meter Proximitor sensor?
No. This 5.0-meter probe works exclusively with the five-meter Proximitor sensor. Using it with any other length will cause calibration errors and inaccurate measurements.

3. What is the recommended torque for the 1/2-20 UNF threads on this probe?
The recommended installation torque is 15.2 N•m (133 in•lb). The maximum allowable torque is 45.2 N•m (400 in•lb). Exceeding this limit can strip threads or damage the probe case.

4. Does the armor affect the cable's minimum bend radius?
No. The minimum bend radius remains 25.4 mm (1.0 inch) with or without the stainless steel armor. Always maintain this radius to prevent internal conductor damage.

5. How should I store this probe if not used immediately?
Store the probe in its original anti-static bag in a clean, dry area within the -51°C to +177°C temperature range. Avoid areas with extreme humidity or corrosive fumes to preserve the O-ring and cable insulation.