Product Overview

The Bently Nevada 330708-00-20-10-12-00 belongs to the specialized 3300 NSv (Narrow Side View) series, engineered specifically for centrifugal compressors and small-diameter shafts where traditional probes fail due to space constraints. This proximity probe provides critical non-contact displacement measurements, monitoring radial vibration and axial position with surgical precision. It plays a decisive role in Turbine Supervisory Instrumentation (TSI), delivering real-time data to Bently Nevada 3500/42M monitors. By detecting microscopic shaft movements before they escalate into catastrophic failures, this probe ensures the operational continuity of high-speed rotating assets in oil and gas, power generation, and petrochemical facilities.

Configuration Matrix & Suffix Analysis

330708 Model Decoder

Each suffix in the 330708-00-20-10-12-00 string represents a specific mechanical or electrical engineering requirement:

Unthreaded Length (-00)

The 00 suffix indicates a 0 mm unthreaded length. The probe features full threading along its case, allowing for maximum flexibility when mounting through brackets or custom housings.

Overall Case Length (-20)

The 20 designation specifies a 20 mm case length. This compact mechanical footprint allows for installation in extremely tight bearing envelopes where standard 50 mm or 80 mm probes cannot fit.

Total Length (-10)

The 10 code confirms a 1.0 meter (3.3 feet) total cable length. This integral lead cable maintains the specific electrical impedance required for the 3300 NSv Proximitor system.

Connector and Adapter Option (-12)

Equipped with a miniature coaxial connector and a factory-installed connector protector plus a FluidLoc seal. The FluidLoc feature prevents oil and moisture from wicking through the cable into the terminal box.

Agency Approval (-00)

The 00 suffix denotes standard approvals. This version is designed for general-purpose industrial environments where specific explosion-proof certifications like ATEX/IECEx are not mandated for the probe body itself.

Technical Specifications

Commissioning & Engineering Insight

Effective installation of the 330708 probe requires a calibrated digital multimeter to set the "Gap Voltage." Engineers must target a quiescent gap voltage of -10.0 VDC to ensure the probe operates at the center of its linear region. Because the NSv series is designed for "narrow side views," it exhibits a smaller side-clearance requirement than standard probes, making it ideal for targets as small as 9.5 mm (0.375 in). Always maintain a minimum cable bend radius of 25.4 mm (1.0 in) during routing to prevent internal coaxial dielectric damage, which can lead to signal noise or "spiking" in the DCS trending.

Asset Protection & System Synergy

The 3300 NSv system is specifically tuned to minimize "side-view" interference from surrounding metal, a common issue in small centrifugal pumps and compressors. This 330708 probe integrates seamlessly with Honeywell Experion PKS or Emerson DeltaV via the Bently Nevada 3500 rack. Its PPS tip resists high-pressure lubricants and corrosive process gases, ensuring that the critical vibration signals remain stable over years of continuous operation. This resilience reduces unplanned outages and supports a proactive maintenance strategy by providing high-fidelity data for orbit and waterfall plot analysis.

Logistics & Global Distribution

We maintain a strategic stock of Bently Nevada NSv components to support emergency plant outages and scheduled turnarounds.

Shipping Window: 3-5 days when payment finish, utilizing prioritized global networks.

Express Carriers: Door-to-door transit via DHL Express, FedEx International, or UPS.

Packing Standards: Every probe is vacuum-sealed in an anti-static industrial moisture-barrier bag. We utilize shock-absorbent reinforced cartons and custom foam inserts to protect the sensitive PPS tip and coaxial connectors from any physical shock during international transit.

Operational FAQ

Q1: Can I use the 330708 NSv probe with a standard 3300 XL Proximitor?

A1: No. The 330708 is part of the NSv (Narrow Side View) family. It has a different electrical response than standard 8mm probes and must be matched with a 3300 NSv Proximitor Sensor to maintain the 200 mV/mil scale factor.

Q2: What is the benefit of the FluidLoc seal (-12 option)?

A2: The FluidLoc seal is a critical feature for bearing housings containing pressurized oil. it prevents lubricants from being forced through the interior of the coaxial cable and leaking into your junction box.

Q3: Is the 1.0-meter cable inclusive of the probe body?

A3: Yes, the 1.0-meter length is measured from the probe tip to the end of the miniature coaxial connector. This must be matched with the correct extension cable to meet the total system length requirement (typically 5m or 7m).