21000-16-10-20-083-03-02 Bently Nevada 8.3 Inch Probe Assembly

Product Overview

The Bently Nevada 21000-16-10-20-083-03-02 is a comprehensive Proximity Probe Housing Assembly engineered for the external mounting of transducers on high-speed rotating machinery. This explosion-proof system integrates a 3300 XL 8mm proximity probe, delivering precise vibration and position data essential for predictive maintenance. Fully compliant with API 670 standards, the 21000 series utilizes a rugged aluminum body and 304 stainless steel sleeve to maintain signal integrity in the most demanding industrial environments.

Technical Configuration

• Manufacturer: Bently Nevada (Baker Hughes)
• Part Number: 21000-16-10-20-083-03-02
• Probe Option: 3300 XL 8 mm probe with connector (16)
• Probe Cable Length: 1.0 m / 39 in (10)
• Standoff Adapter: 2.0 inch length (20)
• Probe Penetration (Option D): 8.3 Inches / 210.8 mm (083)
• Fittings: NPT Plug, Reducer, and Multi-size Cable Seal Grips (-03)
• Mounting Thread: 3/4-14 NPT (02)

Technical Specifications

Installation & Application Features

1. Integrated Standoff Design: This specific configuration includes a 2.0-inch standoff adapter (Option 20), which facilitates the mounting of the housing further away from the machine case. This is often necessary to accommodate thermal insulation or to manage specific clearance requirements on gas turbines and large motors.

2. Adjustable Penetration: The 21000-16-10-20-083-03-02 offers an 8.3-inch penetration depth. To ensure the 3300 XL probe is gapped perfectly against the target surface, the Option D dimension provides a field-adjustment range of ± 0.5 inches (13 mm), allowing for precise calibration after the housing is secured.

3. Explosion-Proof Security: Certified as a CSA Type 4 enclosure, this assembly is designed for hazardous areas (Class I, II, and III). The kit includes a comprehensive fitting package with three cable seal grommets, supporting cable diameters from 1/8 to 3/8 inches to maintain a moisture-proof and gas-tight seal.

Engineering Advantages

The Bently Nevada 21000 series is the industry benchmark for protecting proximity transducers. The combination of a lightweight aluminum housing and a rigid 304 stainless steel sleeve provides an ideal balance of ease of installation and mechanical durability. Because the total penetration length remains under 12 inches, this specific model does not typically require additional sleeve supports, simplifying the mechanical installation while still meeting the rigorous requirements of the API 670 standard for machinery protection systems.

Technical FAQs

Q1: What is the purpose of the standoff adapter in this model?
A1: The 2.0-inch standoff adapter provides extra clearance between the housing body and the machine case, which is useful when working with insulated equipment or limited mounting space.

Q2: Can this housing be used in outdoor environments?
A2: Yes, the CSA Type 4 rating ensures protection against windblown dust, rain, and hose-directed water, making it suitable for unconditioned outdoor industrial sites.

Q3: Is the 3300 XL probe included in the factory packaging?
A3: Yes, this part number refers to a complete assembly that includes the reverse-mount 3300 XL 8mm probe already installed within the housing and sleeve.