Bently Nevada 2201/02-01 N3 Seismic Velocity Transmitter 4-20mA

Bently Nevada 2201/02-01 N3 Seismic Velocity Transmitter Overview

The Bently Nevada 2201/02-01 N3 is a precision-engineered seismic velocity transmitter designed for continuous machinery vibration monitoring in industrial environments. This loop-powered device converts mechanical vibration into a proportional 4-20mA current signal, enabling seamless integration with DCS, PLC, and SCADA systems.

Technical Specifications

• Model Number: 2201/02-01 N3
• Output Signal: 4-20mA (loop-powered)
• Frequency Range: 10 to 1000 Hz
• Velocity Range: 0-25.4 mm/s RMS (0-1.0 in/s RMS)
• Power Supply: 12-30 VDC loop power
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Enclosure Rating: IP67 (weatherproof, dust-tight)
• Mounting: Standard 1/4-28 UNF thread
• Cable Connection: Integral 2-wire cable
• Compliance: CE, RoHS compliant

Key Applications

This seismic transmitter excels in demanding industrial applications including:

• Rotating machinery health monitoring (pumps, motors, fans, compressors)
• Turbine vibration surveillance in power generation facilities
• Process equipment condition monitoring in oil & gas refineries
• HVAC system vibration analysis and fault detection
• Predictive maintenance programs for critical assets
• Continuous monitoring in hazardous area classifications

Solution Benefits

The 2201/02-01 N3 delivers reliable performance through its self-contained velocity sensor and signal conditioning electronics. The loop-powered design eliminates the need for separate power supplies, reducing installation complexity and cost. Its rugged IP67 housing withstands harsh industrial environments including exposure to moisture, dust, and temperature extremes.

Integration is straightforward—the 4-20mA output connects directly to standard analog input modules, providing real-time vibration data for trending, alarming, and diagnostic analysis. This enables early detection of bearing wear, imbalance, misalignment, and other mechanical faults before catastrophic failure occurs.

Frequently Asked Questions

Q: What is the difference between velocity and acceleration transmitters?
A: Velocity transmitters like the 2201/02-01 measure vibration velocity (mm/s or in/s), which correlates well with machinery damage severity across typical industrial frequencies (10-1000 Hz). Acceleration sensors are better suited for high-frequency bearing defect detection.

Q: Can this transmitter be used in hazardous locations?
A: The standard 2201/02-01 N3 is suitable for general industrial use. For hazardous area applications, consult Bently Nevada for intrinsically safe or explosion-proof variants with appropriate certifications.

Q: What cable length is recommended for installation?
A: Maximum cable length depends on loop resistance. For 4-20mA signals, cable runs up to 1000 meters (3280 feet) are typically achievable with proper wire gauge selection to maintain adequate loop voltage.

Q: How do I calibrate the transmitter output?
A: The 2201/02-01 N3 is factory-calibrated with a fixed span (typically 0-25.4 mm/s = 4-20mA). Field calibration is not required. Verify output accuracy using a vibration calibrator or reference standard if needed.

Warranty & Support

All units are backed by a 12-month manufacturer warranty covering defects in materials and workmanship. Technical support and application assistance are available from our experienced team of vibration monitoring specialists.

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