Product Overview
The Bently Nevada 165855-15-CN Cylinder Pressure Transducer is a precision industrial automation module engineered for measuring cyclic absolute pressure changes inside reciprocating compressor cylinders. As an integral component of a Reciprocating Compressor Condition Monitoring and Asset Management System, this transducer pairs with the 3500/77M Cylinder Pressure Monitor and System 1 Plant Asset Management Software to deliver accurate, reliable data for predictive maintenance.
Manufactured in the U.S.A., the 165855-15-CN features a robust design that thrives in harsh chemical environments. Its patent-pending construction ensures continued accuracy even after prolonged cycling over large pressure gradients, and it withstands over-pressure upsets without diaphragm degradation. When operating pressure returns to the specified range, the transducer resumes normal function—minimizing downtime and protecting your investment.
Key Technical Specifications
The 165855-15-CN offers a comprehensive set of performance parameters tailored for demanding compressor applications:
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Measurement Range: 0 to 6.8/17/34.5/69/172/345/689 bar (0 to 100/250/500/1000/2500/5000/10,000 psia)
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Full Scale Output: 10 ± 0.3 Vdc
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Zero Output: 0.5 ± 0.1 Vdc
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Power Supply: 18 to 30 Vdc
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Max Current: < 15 mA
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Frequency Response: 0 Hz to 5500 Hz ± 1 dB
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Linearity, Hysteresis, Repeatability: ±0.3 %FS
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Operating Temperature: -40 to 85°C (electronics housing), -40 to 150°C (sensor head)
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Proof Pressure: 1.5X Full Scale
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Burst Pressure: 3X Full Scale (2X FS on 689 bar/10,000 psia units)
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Environmental Rating: Designed to meet NEMA 4X and IP67 conditions
These specifications ensure reliable operation in extreme conditions, making the Bently Nevada 165855-15-CN a trusted choice for continuous monitoring.
Industry Applications
The 165855-15-CN is purpose-built for reciprocating compressors found in oil & gas, petrochemical, and power generation facilities. It excels in measuring cyclic pressure changes, enabling early detection of valve leaks, ring wear, and other mechanical issues. By integrating with System 1 software, operators gain actionable insights that reduce unplanned outages and extend equipment life.
Its ability to handle over-pressure events without diaphragm degradation makes it ideal for processes with frequent upsets. The transducer's compatibility with a wide range of media—including hydrogen sulfide, natural gas, and ammonia—expands its utility across diverse chemical environments.
Installation & Setup Guidance
Proper installation is critical for optimal performance. The wetted surface of the 165855-15-CN typically mounts into an isolation valve or pressure indicator port on the compressor. A special adapter, such as the 166393 adapter, provides a secure seal between the port and the transducer. The electronics housing is separated from the wetted surface by 1 meter of cable, allowing the electronics to be secured on or near the compressor for best results.
All transducers feature a 7/8-14 UNF thread. Ensure the mounting torque does not exceed 68 N-m (50 lbf-ft) to prevent damage. The transducer is designed to meet IP67 for moisture ingress; however, the connector should remain dry. Avoid overtightening and always verify the O-ring material is compatible with your process media.
Maintenance & Reliability
Routine inspection of the transducer and its cable is recommended to maintain accuracy. Check for signs of corrosion or mechanical damage, particularly on the sensor head. The robust design minimizes the need for frequent recalibration, but periodic verification against a known pressure source ensures long-term reliability.
The transducer's ability to recover from over-pressure events without diaphragm degradation reduces maintenance frequency and associated costs. By choosing the Bently Nevada 165855-15-CN, you invest in a component that supports continuous operation and lowers total cost of ownership.
Selection Guide & Purchasing Advice
When selecting a replacement or upgrade, verify the pressure range and agency approval options. The 165855-15-CN model specifies a pressure range of 0 to 172 bar (0 to 2,500 psia) with armor, and the CN approval is country-specific. Confirm compatibility with your existing 3500/77M monitor and System 1 software.
PLC Source PRO is your reliable supplier for genuine Bently Nevada parts, ensuring authentic components that meet original specifications. For detailed ordering information or to discuss your application, our team is ready to assist.