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Kurz Instruments – Flow Averaging Transmitter

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The Kurz Series 255 Flow Averaging Transmitter is a versatile system transmitter designed for measuring flow rates in very large ducts that have non-uniform or unstable velocity profiles and/or wide temperature ranges. The Series 255 is a state-of-the-art microprocessor-based system that powers and reads up to 16 independent sensing points, providing a grand average of the flow and temperature.

The Series 255 continuously reads and analyzes flow and temperature data from the individual channels, and automatically removes channels from the average that are under alarm or have been removed for service or repair. The Series 255 is designed for high reliability and high availability with multiple and independent power and communication ports so that wiring issues will not bring down the entire multisensor network.

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PRODUCT DESCRIPTION:

Features & Benefits

  • Up to 16 Multipoint Sensors: Enables accurate flow and temperature averaging in large or irregular duct systems.
  • Sensor Fault Isolation & Re-Averaging: Automatically removes faulty channels from calculations—maintains accuracy and uptime.
  • High-Speed Measurement (<0.1s per sensor): Captures fast-changing flow conditions; critical for real-time process control.
  • -40 to 932°F Temperature Range: Handles extreme stack and flue gas temperatures in industrial settings.
  • Dual 4–20 mA Outputs & Relay Alarms: Integrates with control systems and provides configurable process alerts.
  • Digital Inputs (Maintenance & Calibration Triggers): Allows external control of service modes and calibration cycles without manual access.
  • Six Power/Data Ports for Channel Segmentation: Provides redundancy and segmentation for fault isolation and modular design.
  • Display & Logging Interface: Backlit 4-line display with keypad, 30-day flow total logs, real-time diagnostics.
  • NAMUR & MODBUS Compliance: Supports industrial communication standards and SCADA/DCS integration.
  • IP65/IP66 & NEMA 4X Enclosures: Suitable for harsh, wet, and dusty environments—including outdoor and washdown areas.
  • Stainless Steel or Polycarbonate Housing: Optional rugged housing materials for corrosive or hazardous environments.
  • Field Calibration Support & Startup Services: In-situ calibration and commissioning offered to maximize field accuracy and reliability.

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