1. Product Overview — Bently Nevada 330850‑90‑CN

Introduction

The Bently Nevada 330850‑90‑CN is a non‑contact proximity (Proximitor) sensor module in the 3300 XL 25 mm transducer series. It is designed to convert minute displacements of a rotating shaft relative to a static reference into a voltage signal. The “90” indicates a 9.0‑metre system length (probe + extension cable + module). The suffix “CN” denotes a China / regional variant — typically reflecting local labeling, certifications, or packaging geared for Chinese market use, while maintaining the same fundamental measurement performance.

This sensor is intended for continuous monitoring of shaft vibration, displacement, or position in critical rotating machinery, such as turbines, compressors, pumps, motors, and fans. It is useful when the proximity probe is located some distance from the electronics, or in configurations where cable routing demands longer reach.

2. Technical Specifications

Below is a table of expected or inferred specifications for the 330850‑90‑CN variant. Because the “CN” suffix is primarily regional, its core electrical and mechanical parameters align with the certified “‑05” version, with adjustments for local compliance.

Note: The “CN” suffix typically does not alter physical size or electrical behavior — it mainly customizes certification, labeling, or packaging for the Chinese market.

3. Applications

The 330850‑90‑CN is suited for many industrial use cases where long wiring distances or regional compliance are required. Typical application domains:

• Steam and gas turbine shaft displacement / vibration monitoring

• Large industrial generators / motors

• High-pressure compressors and pumps

• Long-distance sensor wiring in remote machine rooms

• Retrofitting legacy proximity systems with modern standards

• Vibration diagnostics and trend monitoring

• Condition-based predictive maintenance and protection

• Petroleum, chemical, refining, power generation environments

Its 9‑metre reach gives flexibility in routing cable from probe to control cabinets without needing intermediate signal boosters.

4. Advantages & Key Features

Here are the principal benefits of the 330850‑90‑CN:

1. Extended reach (9.0 m)
   Enables distant placement of electronics relative to the probe location, simplifying installation in large or spread-out plants.

2. Non-contact measurement
   No physical contact with the shaft, eliminating wear, friction or perturbation of the rotor.

3. Regional compliance (“CN” version)
   Localized approvals and labeling reduce deployment friction in the Chinese market or locally regulated zones.

4. High accuracy & stability
   Stable sensitivity (~0.787 V/mm) across temperature and time ensures reliable displacement and vibration data.

5. Strong EMI / RFI immunity
   Designed with robust shielding and internal filtering to operate in noisy industrial environments.

6. Compact module form factor
   The module can be fitted into panels with limited space without compromising performance.

7. Tool‑free wiring
   SpringLoc or equivalent terminals allow quick field wiring and maintenance.

8. Interchangeability
   Compatible with other 3300 XL 25 mm probes, extension cables, and monitoring rack units.

9. Durability and reliability
   Rugged construction and proper thermal design provide long operational life in harsh conditions.

5. Related / Same-Series (or Closely Associated) Models

Here are five related or similar models in the 330850 / 3300 XL family. The model name column is bolded.

These variants allow you to choose based on cable length, mounting format (panel vs DIN), and certification requirements.

6. Popular Models from the Same Brand

Listed below are five well-known Bently Nevada product models (or modules) that are frequently used or referenced in monitoring systems.