Bently Nevada 330105-02-12-90-12-00 Probe

Product Introduction

The Bently Nevada 330105-02-12-90-12-00 is a precision-engineered reverse mount proximity probe from the trusted 3300 XL series. This sensor is specifically designed to measure radial vibration, axial position, and keyphasor signals on rotating machinery like steam turbines, compressors, and gas turbines. This model offers a 9.0-meter (29.5 feet) total length, providing flexibility for installations where the proximity sensor system requires a longer reach from the probe tip to the junction box.

Its construction uses a 3/8-24 thread case and includes a Miniature ClickLoc coaxial connector. Furthermore, the FluidLoc cable option is designated, but it is generally unnecessary for most applications due to the protective probe sleeve. The 330105-02-12-90-12-00 is a reliable choice for machinery protection, delivering consistent output to a Bently Nevada monitoring system.

Technical Specifications

Electrical Characteristics

The 330105-02-12-90-12-00 operates with a nominal DC resistance of 9.87 ± 0.50 Ω from center to outer conductor, measured at its full 9.0-meter length. Its connector option is the –12 Miniature ClickLoc coaxial type, which also includes a FluidLoc cable. Additionally, this sensor uses a standard 3/8-24 thread case with a maximum thread engagement of 0.563 inches. Its physical dimensions are 20.4 cm x 22.2 cm x 3.7 cm, and it weighs approximately 323 g/m (11.4 oz).

Environmental and Temperature Performance

This probe supports a standard operating and storage range of –52°C to +177°C (–62°F to +350°F). For applications requiring higher thermal resistance, the extended temperature range probe tip withstands up to +218°C (+425°F). Meanwhile, the probe cable and connector can tolerate temperatures from –51°C to +260°C (–60°F to +500°F). However, it is important to note that exposing this sensor to temperatures below –34°C (–30°F) may lead to premature pressure seal failure.

Pressure and Humidity Ratings

The 3300 XL 8 mm probes are engineered to seal differential pressure between the tip and the case, using a Viton® O-ring as the sealing material. Nevertheless, these probes are not pressure tested prior to shipment. In terms of humidity resistance, the 330105-02-12-90-12-00 demonstrates less than a 3% change in Average Scale Factor (ASF) when subjected to 93% relative humidity for up to 56 days, per IEC standard 68-2-3.

Hazardous Area Approvals

The Bently Nevada 330105-02-12-90-12-00 is certified for use in demanding environments. Specifically, when installed with intrinsically safe zener barriers (per drawing 141092) or galvanic isolators, it achieves Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; and Class I, Groups A, B, C, D; Class II, Groups E, F, G; and Class III ratings.

Furthermore, when connected with a nonincendive circuit per drawing 140979, this probe qualifies for Class I, Zone 2: AEx/Ex nA IIC T5…T1 Gc; Class I, Division 2, Groups A, B, C, D; and Class I, Zone 2: AEx/Ex ec llC T5…T1 Gc. Its temperature classification schedules are also clearly defined for both EPL Ga/Gc and Dc applications, ranging from T1 to T5 depending on ambient conditions.

Installation Guidance

Proper installation of the 330105-02-12-90-12-00 begins with verifying the thread engagement length, which should not exceed 0.563 inches to ensure secure mounting. For most standard installations, the FluidLoc cable option is unnecessary because the probe sleeve already provides adequate protection. Nevertheless, users should carefully evaluate their specific application before omitting this feature.

Additionally, ensure that the target surface is clean and within the specified gap range for optimal linear output. The ClickLoc connector provides a positive locking mechanism, preventing accidental disconnection during operation. Finally, always route the 9.0-meter cable away from high-temperature sources and sharp edges to preserve cable integrity and signal quality.

Packaging List

• 1 x Bently Nevada 330105-02-12-90-12-00 Reverse Mount Probe (9.0m length with ClickLoc connector)

• 1 x Mounting thread sealant (pre-applied)

• 1 x Installation instruction sheet (quick reference)

• 1 x Protective end cap for transport

Shipping & Delivery

All orders are shipped via FedEx, UPS, or DHL with full tracking and insurance. Standard delivery typically takes 3–5 business days depending on destination. Expedited shipping options are available upon request.

FAQ

1. What is the total length of the Bently Nevada 330105-02-12-90-12-00?
This model features a total length of 9.0 meters (29.5 feet), which includes the probe tip, cable, and connector.

2. Is the FluidLoc cable option necessary for this probe?
In most standard installations, the FluidLoc option is not required due to the existing probe sleeve. However, we recommend assessing your specific environmental conditions before deciding.

3. Can this probe be used in hazardous areas?
Yes, the 330105-02-12-90-12-00 is approved for Class I, Zone 0 and Zone 2 environments when installed with the appropriate intrinsic safety barriers or nonincendive circuits.

4. What is the recommended operating temperature for this sensor?
The standard probe operates between –52°C and +177°C. For higher temperatures, the extended range tip can handle up to +218°C.

5. What is the DC resistance value for this 9.0m probe?
The nominal DC resistance from center to outer conductor is 9.87 ± 0.50 Ω at 9.0 meters length.