Product Overview
The Bently Nevada 21000-16-10-00-040-03-02 is a precision-engineered proximity probe housing assembly designed for continuous vibration and position monitoring in critical rotating machinery. This industrial automation module provides a robust, explosion-proof enclosure for a 3300 XL 8 mm probe, ensuring reliable operation in hazardous environments. With a 1.0 m (39 in) probe cable and a 4-inch probe penetration, this assembly delivers accurate measurements while protecting the sensor from harsh conditions.
Manufactured by Bently Nevada, the 21000-16-10-00-040-03-02 features an aluminum body with a 304 stainless steel sleeve, combining lightweight durability with corrosion resistance. It is certified as a CSA Type 4 enclosure and fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. This product is supplied new and in original factory packing, backed by a 12-month factory warranty.
Technical Specifications
The following specifications are directly from the manufacturer for the 21000-16-10-00-040-03-02:
| Parameter |
Value |
| Probe Option |
3300 XL 8 mm probe with connector |
| Probe Cable Length |
1.0 m (39 in) |
| Standoff Adapter |
None |
| Probe Penetration |
4 in |
| Fitting Option |
One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, one cable seal grip with grommets for 1/8 to 3/16 in, 1/4 to 5/16 in, and 5/16 to 3/8 in cables |
| Mounting Thread |
3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) with visible probe |
17.0 in (43.18 cm) |
| Maximum (C) + (D) Dimension |
32.9 in (83.5 cm) |
| Weight (typical, without fittings) |
1.1 kg (2.4 lb) |
These specifications ensure precise fit and function for your monitoring system. The assembly includes a dome cover, threaded ports for conduit connections, probe sleeve, O-rings, reverse mount proximity probe, thread seal, and optional conduit fittings and standoff adapter.
Industry Applications
The 21000-16-10-00-040-03-02 is ideal for use in refineries, power plants, and other facilities where rotating equipment such as turbines, compressors, and pumps require continuous vibration monitoring. Its explosion-proof rating makes it suitable for hazardous areas where flammable gases or vapors may be present. For example, in a petrochemical plant, this housing protects the probe from environmental contaminants while maintaining accurate readings, reducing unplanned downtime.
In a power generation setting, the assembly's CSA Type 4 enclosure ensures protection against water and dust ingress, making it reliable for outdoor installations. The 4-inch probe penetration allows flexibility in mounting depth, accommodating various machine geometries. This module is a critical component for predictive maintenance programs, helping operators detect early signs of bearing wear or shaft misalignment.
Installation & Setup
Proper installation of the 21000-16-10-00-040-03-02 ensures optimal performance. Begin by verifying that the mounting thread (3/4-14 NPT) matches the machine's tapping. If a standoff adapter is not used (as in this model), the mounting thread must be ordered as specified. Secure the housing using appropriate sealants to maintain the explosion-proof integrity.
Route the probe cable through the provided cable seal grip, ensuring the grommet size matches the cable diameter (1/8 to 3/8 inches). Tighten the dome cover firmly to compress the O-rings and maintain the enclosure rating. After installation, check that the probe tip is positioned correctly relative to the target surface, typically within the recommended gap range.
For initial setup, connect the probe to the monitor system and verify signal output. Calibrate the system according to the manufacturer's instructions to ensure accurate displacement readings. Always follow plant safety procedures when working in hazardous areas.
Maintenance & Reliability
Routine inspection of the 21000-16-10-00-040-03-02 is essential for long-term reliability. Periodically check the dome cover and conduit fittings for tightness, and inspect the cable seal grip for signs of wear or damage. Replace O-rings if they show cracking or loss of elasticity.
Environmental factors such as extreme temperatures, moisture, or corrosive agents can accelerate wear. The aluminum body with 304 stainless steel sleeve offers excellent corrosion resistance, but regular cleaning is recommended. A well-maintained housing reduces the risk of probe failure, minimizing costly downtime. By investing in this durable assembly, you extend the service life of your monitoring system and reduce total cost of ownership.
Buying Guide
Before purchasing the 21000-16-10-00-040-03-02, verify that your system requires a 3300 XL 8 mm probe with a 1.0 m cable. Confirm the probe penetration of 4 inches and the NPT mounting thread. This model includes specific fittings (3/4-14 NPT plug, reducer, and cable seal grip) suitable for most installations.
For additional options, such as a standoff adapter or different cable lengths, consider other models in the 21000 series. PLC Source PRO offers this product new and original with a 12-month warranty, ensuring you receive a genuine Bently Nevada component. Contact our team for assistance in selecting the right housing for your application.