Bently Nevada 330707-00-20-10-02-00 3300 XL 11 mm Probe

Product Introduction

The Bently Nevada 330707-00-20-10-02-00 belongs to the trusted 3300 XL series, widely used for non-contact vibration and displacement measurement in turbomachinery. This 11 mm proximity probe offers a robust design with a PPS tip and AISI 304 stainless steel case, ensuring durability in harsh industrial environments. Its 5/8-18 UNF threaded case simplifies installation, while the 1.0 meter triaxial FEP cable provides flexibility for various mounting distances. Additionally, the miniature coaxial ClickLoc connector guarantees a secure and quick connection, reducing downtime during maintenance. This model excludes armor and agency approvals, making it a cost-effective choice for standard monitoring applications.

Technical Specifications

Electrical Characteristics

The Bently Nevada 330707-00-20-10-02-00 probe exhibits a DC resistance of 5.9 ± 0.5 ohms between the center and outer conductors at 1.0 meter length. This low resistance ensures minimal signal loss, preserving measurement accuracy over extended cable runs. The probe cable is a 75 Ω triaxial type with FEP insulation, which resists high temperatures and chemical exposure. Furthermore, the connector-to-connector torque recommendation is finger-tight, with a maximum of 0.565 N•m (5 in•lb) to prevent over-tightening damage.

Mechanical Dimensions

This model includes a 5/8-18 UNF thread with a maximum engagement length of 0.938 inches (23.8 mm). The unthreaded length option is 0 inches, while the overall case length measures 2.0 inches. Total probe length is 1.0 meter (3.3 feet), suitable for many standard mounting configurations. The minimum bend radius for the cable is 25.4 mm (1.0 inch), allowing flexible routing in tight spaces without performance degradation.

Material Construction

The probe tip uses Polyphenylene sulfide (PPS) , a high-performance polymer that resists wear and chemical attack. Its case is made from AISI 304 stainless steel, providing excellent corrosion resistance and structural integrity. The cable insulation is fluoroethylene propylene (FEP), which maintains flexibility and dielectric strength across the full temperature range. Additionally, a Viton O-ring seals the probe tip to the case, preventing process fluid ingress.

Environmental and Mechanical Ratings

Temperature and Pressure

The Bently Nevada 330707-00-20-10-02-00 operates and stores between -51°C and +177°C (-60°F to +351°F). However, exposing the probe below -34°C (30°F) may prematurely degrade the pressure seal. The probe is designed to seal differential pressure between tip and case, though it is not pressure-tested before shipping. For applications requiring verified pressure seals, please contact our custom design department for testing services.

Torque and Installation

For the 5/8-18 threaded case, the recommended installation torque is 15.2 N•m (133 in•lb) , while the maximum rated torque is 45.2 N•m (400 in•lb) . Always adhere to the recommended torque to avoid thread stripping or case deformation. When connecting the ClickLoc connector, apply only finger-tight force, not exceeding 0.565 N•m (5 in•lb) , to prevent connector damage.

Installation Guidelines

Mounting Preparation

Before installing the Bently Nevada 330707-00-20-10-02-00 probe, ensure the mounting hole is clean and free of debris. Verify that the thread engagement does not exceed 0.938 inches to avoid bottoming out. Use a suitable thread sealant compatible with the operating temperature to maintain pressure integrity. Additionally, confirm that the cable bend radius stays above 25.4 mm to prevent signal attenuation or cable breakage.

Cable Routing

Route the triaxial FEP cable away from high-voltage sources and moving parts to avoid electromagnetic interference and physical damage. Secure the cable using appropriate clamps, but avoid overtightening that could compress the insulation. For optimal performance, maintain a gentle curve when routing around corners, respecting the minimum bend radius. Moreover, label both ends of the cable for easy identification during future maintenance.

Connection Procedure

Attach the miniature coaxial ClickLoc connector by aligning the keyway and pushing firmly until it clicks. Hand-tighten the coupling nut to the recommended finger-tight torque. Never use tools to tighten this connector, as excessive force may crack the housing or degrade the center pin alignment. After connection, perform a continuity check to confirm proper electrical contact before powering up the system.

Packaging List

• Bently Nevada 330707-00-20-10-02-00 probe assembly (1 unit)

• Protective cap for connector (1 unit)

• Installation instructions sheet (1 copy)

Note: The package does not include mounting hardware, cables, or certification documents.

Shipping Information

All orders are shipped via FedEx, UPS, or DHL with tracking numbers provided upon dispatch. Standard delivery time ranges from 3 to 7 business days depending on destination. Expedited shipping options are available upon request.

Frequently Asked Questions (FAQ)

Q1: What is the total length of the Bently Nevada 330707-00-20-10-02-00 probe?
A1: The total probe length is 1.0 meter (3.3 feet) , as indicated by the "10" option in the model number.

Q2: Can this probe be used in high-pressure environments?
A2: The probe is designed to seal differential pressure, but it is not factory pressure-tested. For high-pressure applications, please contact our custom design team for optional pressure testing.

Q3: What is the maximum torque for installing the 5/8-18 threaded case?
A3: The maximum rated torque is 45.2 N•m (400 in•lb) , but we strongly recommend 15.2 N•m (133 in•lb) for reliable installation without damaging the threads.

Q4: Is the cable compatible with extension cables?
A4: Yes, the 75 Ω triaxial cable can be extended using Bently Nevada approved extension cables, provided the total system length does not exceed the driver capability.

Q5: What should I do if the probe is exposed to temperatures below -34°C?
A5: Prolonged exposure below -34°C may compromise the Viton O-ring seal. Consider using a heated enclosure or selecting a probe with a wider low-temperature rating for such conditions.