Product Overview
Bently Nevada 21128-02-01 MOD 148264-02 is a water and corrosion-resistant velocity transducer housing designed for industrial vibration monitoring applications in harsh environments. It is used to protect velocity sensors installed on pumps, compressors, motors, and process machinery operating in outdoor or moisture-exposed conditions.
This housing provides mechanical protection and environmental sealing for velocity transducers used in condition monitoring systems. It is commonly applied in power generation, offshore platforms, and chemical processing plants where corrosion resistance and environmental durability are critical.
The 3/4 in 14 NPT mounting interface ensures secure installation into standard industrial machine housings, while maintaining stable sensor positioning for accurate vibration measurement.
Configuration Breakdown
| Segment |
Meaning |
| 21128 |
Velocity transducer housing series |
| 02 |
3/4 in 14 NPT mounting thread |
| 01 |
1/2 in NPT cable exit plug configuration |
| MOD 148264-02 |
Design modification / accessory package |
Each element defines mechanical interface, cable sealing configuration, and product revision level within the housing system.
Technical Specifications
| Parameter |
Specification |
| Model |
21128-02-01 MOD 148264-02 |
| Brand |
Bently Nevada |
| Origin |
United States |
| Weight |
1.6 kg |
| Shipping Weight |
3 kg |
| Product Type |
Velocity transducer housing |
| Mounting Thread |
3/4 in 14 NPT |
| Cable Exit |
1/2 in NPT plug |
| Temperature Range |
-29 to 121 deg C |
| Moisture Protection |
Corrosion-resistant, not submersible |
| O-ring Material |
Neoprene |
| Application |
Velocity vibration sensor protection |
Engineering Interpretation Notes
This housing is designed to extend the operational life of velocity transducers in corrosive and moisture-prone environments. It provides a sealed mechanical interface that protects internal sensing components from environmental degradation.
The NPT threaded structure ensures compatibility with standard industrial machine ports, reducing installation complexity in retrofit and OEM applications.
Neoprene sealing improves resistance to oil, moisture, and moderate chemical exposure commonly found in industrial processing environments.
Field Application Notes
Where is this housing used?
It is used in pumps, motors, compressors, and outdoor industrial machinery.
Is it waterproof?
It is moisture and corrosion resistant but not designed for submersion.
Why is corrosion resistance important?
It ensures long-term stability in offshore, chemical, and outdoor environments.
Can it be used with all velocity transducers?
It is designed specifically for compatible Bently Nevada velocity transducer systems.
Installation & Commissioning Notes
Ensure proper tightening of 3/4 in NPT threads to maintain sealing integrity under vibration conditions.
Verify cable exit sealing to prevent moisture ingress in outdoor installations.
Avoid excessive mechanical load on housing body during installation to preserve structural integrity.
Inspect O-ring condition before commissioning to ensure proper environmental sealing.
Engineering & Operational Guidance
Apply correct sealing compound on threaded connections for high-moisture environments.
Route cables with drip-loop configuration to prevent water ingress into electrical entry points.
Avoid installation in direct water jet exposure zones, as the housing is not submersible.
Perform periodic inspection in corrosive environments to maintain long-term sealing performance.