Technical Specifications Breakdown
Key parameters for the 21000-34-00-20-066-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 Proximity Probe Housing Assemblies |
| Probe Option | 34 = 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals |
| Probe Cable Length | 00 = Probe cable not required |
| Standoff Adapter | 20 = 2.0 in |
| Probe Penetration | 066 = 6.6 in |
| Mounting Thread Option | -02 = 3/4-14 NPT |
| Material | 21000 Aluminum body with 304 stainless steel sleeve |
| Probe Cable Length (integral) | 1.0 m |
| Maximum (C) + (D) Dimension | 32.9 in (83.5 cm) |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Application Versatility in Rotating Machinery
The 2.0 in standoff adapter and 6.6 in probe penetration allow flexible mounting in tight spaces while maintaining the correct gap. The included fitting kit (one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for multiple cable sizes) simplifies installation and ensures a secure, weatherproof seal.
Installation and Setup Guidance
For optimal performance, mount the housing on a rigid, non-vibrating surface. Use the 3/4-14 NPT mounting thread (option -02) for a secure connection. Ensure the probe tip is positioned at the correct gap per the probe manufacturer's specifications. The cable seal grip must be tightened to prevent moisture ingress. Always verify that the housing is properly grounded and that all conduit connections are sealed according to local electrical codes.
Maintenance and Reliability
The 21000-34-00-20-066-03-02 requires minimal maintenance. Periodically inspect the housing for signs of corrosion, damage, or loose fittings. Check the cable seal grip and grommets for wear. In harsh environments, clean the exterior with a mild detergent and water. The aluminum body and stainless steel sleeve provide resistance to corrosion and mechanical damage, ensuring long service life.
Robust Protection for Critical Vibration Monitoring
This assembly is engineered to safeguard the sensitive proximity probe while maintaining accurate gap measurements for machinery protection.

Engineered for Hazardous Area Compliance
This housing assembly is designed for use in potentially explosive atmospheres. It is available with Canadian Standards Association (CSA) approvals and is rated explosion proof for hazardous areas. The 21000 aluminum housing, combined with the 3300 XL 8 mm probe with connector protector, supports intrinsically safe applications. Both the 21000 and 24701 housings are certified as CSA Type 4 enclosures, ensuring protection against dust, water, and corrosion. This assembly fully complies with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings, making it a trusted choice for oil and gas, petrochemical, and power generation facilities.

Selection Guide and Purchasing Advice
When selecting a proximity probe housing assembly, consider the probe type, cable length, standoff adapter, and penetration depth required for your specific machine. The 21000-34-00-20-066-03-02 is configured with a 3300 XL 8 mm probe, 2.0 in standoff, and 6.6 in penetration, making it suitable for many standard applications. For custom configurations, contact AutoDCSTech for assistance. All units are new and original in factory packing with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-00-20-066-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
