Product Overview
The Bently Nevada 107770-01-01 is a Velocity Transducer Housing designed for use in hazardous environments. This unit combines the 330500 Velomitor Sensor with a 21128 Housing, preinstalled at the factory, and carries CENELEC approval for Zone 1, Group IIC applications. The 107770-01-01 ensures reliable vibration monitoring in explosive atmospheres, meeting stringent safety standards. Its construction adheres to ATEX and IECEx requirements, using cable type A or B per EN 60079-25.
Applications and Use Cases
In petrochemical plants, the Bently Nevada 107770-01-01 provides critical vibration data on rotating machinery such as turbines and compressors. The unit's CENELEC Zone 1 rating makes it suitable for areas with flammable gases. For example, in a refinery's pump system, this transducer housing delivers accurate velocity measurements to detect imbalance or bearing wear. The 107770-01-01 also performs well in gas processing facilities where Group IIC gases (like hydrogen) are present. Its factory-assembled design simplifies deployment in retrofits or new installations.
Installation and Setup Guidance
Mounting the Bently Nevada 107770-01-01 requires attention to thread options: the 01 suffix indicates an unthreaded mounting with a 1/2-14 NPT plug for cable exit. Ensure the cable type (A or B) respects entity parameters listed in the equipment documentation. Secure the housing to a flat, solid surface using appropriate brackets (not supplied). During installation, avoid overtightening to prevent housing distortion. For Zone 2 areas, electrical parameters must not exceed the values specified in the product tables. Always verify grounding per local regulations.
Maintenance and Reliability
The Bently Nevada 107770-01-01 requires minimal routine inspection—check for cable integrity and housing seal condition every six months. In corrosive atmospheres, inspect the housing for pitting or chemical attack. Since the unit is factory-sealed with the sensor, no internal adjustments are possible. Environmental factors like extreme temperature or vibration can affect long-term reliability; the housing's robust design mitigates these risks. Replacing the entire assembly is recommended if any damage is found.
Selection Guide and Purchasing Advice
When ordering the Bently Nevada 107770-01-01, verify the mounting thread option (01 = unthreaded) and cable exit fitting (01 = 1/2-14 NPT plug) match your application. Confirm the hazardous area classification (CENELEC Zone 1, Group IIC) aligns with your site safety requirements. UBEST Automation (ubest101) supplies this unit as new and in original factory packing with a 12-month warranty. For specifications beyond those listed, please contact your sales engineer. This part is a direct replacement for the 330500/21128 combination and requires no additional adapters.
Troubleshooting and Common Issues
A common issue with the Bently Nevada 107770-01-01 is incorrect cable type selection—using a cable not complying with EN 60079-25 can void the hazardous area rating. Always use cable type A or B that meets the entity parameters. If the housing does not seal properly, check the NPT plug is fully tightened. For erratic readings, verify that the mounting surface is free of excessive vibration or resonance. If the sensor fails, the entire housing must be replaced as the assembly is non-servicable.