How to calculate ultrasonic flowmeter sensor installation spacing? What are the standard formulas?

Ultrasonic flowmeter spacing formula L=K×D×cosθ, Z-method and V-method calculations

Ultrasonic flowmeter sensor installation spacing calculation is crucial for ensuring measurement accuracy. The installation spacing depends on pipe outer diameter, wall thickness, material, and sensor operating frequency.

The standard calculation formula is: L = K × D × cosθ, where L is sensor spacing, D is pipe outer diameter, K is correction factor, and θ is acoustic beam angle.

  • Z-method (Reflection): L = K × D, suitable for DN50-300 pipes
  • V-method (Transmission): L = K × D × 0.5, suitable for DN300+ large diameter pipes
  • Correction factor K range: 0.5-2.0, determined by pipe material
  • Steel pipe: K=1.0, Cast iron: K=1.2, Plastic pipe: K=0.8
Ecolor Technology provides professional installation spacing calculation software that automatically calculates optimal installation parameters based on site conditions.

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