Bently Nevada 330902-00-95-05-01-05 3300 NSv Armored Probe

Product Introduction

The Bently Nevada 330902-00-95-05-01-05 belongs to the 3300 NSv series, specifically designed with stainless steel armor for enhanced cable durability. This armored construction protects the coaxial cable from abrasion, cutting, and crushing in heavy industrial settings. Meanwhile, the compact 1/4-28 UNF thread allows installation in narrow spaces where standard probes cannot reach. Additionally, this model features a 9.5 inch overall case length and a 0.5 metre cable, offering flexibility for short-reach mounting configurations. The probe carries multiple agency approvals (option 05), including ATEX, CSA, and IECEx for hazardous area use. Many engineers choose this armored variant for steam turbine casings, compressor bearing housings, and paper mill machinery where mechanical damage risks are high.

Technical Specifications

The 330902-00-95-05-01-05 probe utilizes a 75 Ω coaxial cable with FEP insulation, provided in a 0.5 metre total length. Its DC resistance from center conductor to outer conductor measures 4.0 ± 0.5 ohms, ensuring accurate and repeatable output. The unthreaded length option is 0.0 inches, while the overall case length extends to 9.5 inches – this longer case suits deep-well mounting applications. For connectivity, this probe includes a miniature coaxial ClickLoc connector with a protector, paired with standard cable (option 01). Agency approval option 05 confirms multiple certifications, covering North American and European regulatory standards. Specifically, the probe tip uses polyphenylene sulfide (PPS) for wear resistance, while the AISI 304 SST case and armor provide superior corrosion protection in wet or chemical-laden environments.

Mechanical & Environmental Parameters

This Bently Nevada probe operates reliably from -52°C to +177°C (-62°F to +351°F) for both operation and storage. However, prolonged exposure below -34°C (-30°F) can accelerate Viton O-ring deterioration, potentially compromising the pressure seal. The probe case thread is 1/4-28 UNF with a maximum engagement length of 0.375 inches. For installation, the maximum rated torque is 7.3 N•m (65 in•lb), while the recommended torque is 5.1 N•m (45 in•lb) to prevent thread damage. The connector-to-connector connection should be finger tight only. Moreover, the probe weight ranges from 14 to 150 g (0.5 to 5.3 oz), depending on cable length – the armored version adds minimal extra mass. The Viton O-ring seals differential pressure between tip and case, though each unit is not pressure tested prior to shipment.

Installation Guidelines

When installing the 330902-00-95-05-01-05, begin by inspecting the 1/4-28 threaded hole for burrs or contamination. First, hand-thread the probe carefully to avoid cross-threading the fine pitch threads. Next, set the initial gap according to your system's calibration requirements, then tighten to 5.1 N•m (45 in•lb) using a calibrated torque wrench. Remember to route the armored cable with a minimum bend radius of 25.4 mm (1.0 inch) to maintain signal integrity and avoid armor kinking. Additionally, secure the ClickLoc connector by finger-tightening only – tools are not required and may cause over-torquing. For hazardous area installations, verify that the probe's multiple approvals match your local certification requirements. Finally, avoid storing the probe below -34°C for extended periods to protect the Viton seal's longevity.

Packaging List

• 1 x Bently Nevada 330902-00-95-05-01-05 3300 NSv Armored Proximity Probe

• 1 x Miniature coaxial ClickLoc connector protector (pre-installed)

• 1 x Armored standard coaxial cable assembly (0.5 metre)

• Installation torque reference card

Note: No mounting hardware, certificates, or warranty documents are included.

Frequently Asked Questions (FAQ)

1. What makes the 330902-00-95-05-01-05 different from the non-armored NSv probe?
This model includes stainless steel armor over the coaxial cable, providing extra protection against mechanical damage, abrasion, and cutting in harsh industrial environments.

2. Where should I use the Bently Nevada 330902-00-95-05-01-05?
It is ideal for steam turbines, compressors, large gearboxes, and pulp & paper machinery where cable routing exposes the probe to physical stress or sharp edges.

3. Can the 0.5 metre cable of this 3300 NSv probe be extended?
Yes, you can connect Bently Nevada extension cables (coaxial type) to achieve total system lengths of 1, 5, or 7 metres as your application requires.

4. Is the 330902-00-95-05-01-05 approved for use in explosive atmospheres?
Yes, option 05 indicates multiple agency approvals, including ATEX and IECEx certifications for hazardous area installations – always check your specific zone requirements.

5. What torque should I apply to the 1/4-28 threads of this armored probe?
Apply 5.1 N•m (45 in•lb) as the recommended torque. The maximum allowable is 7.3 N•m (65 in•lb) – exceeding this may strip the threads or crack the case.