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Why does my flow meter read very erratically or show flow spikes?

by | Oct 8, 2025 | 0 comments

Fluctuating flow readings are often caused by contaminated gas, turbulent flow or incorrect sensor installation. Stable conditions improve measurement reliability.

Possible causes:
  • The air or gas might be contaminated with moisture, oil, or particles.
  • Turbulent flow caused by nearby elbows, valves, or other obstructions may be affecting readings.
  • The sensor could be loose or not inserted to the correct depth.
Solutions:
  • Inspect filters and dryers upstream of the sensor to ensure clean, dry air.
  • Check for rust, oil, or debris that could be interfering with the sensor element.
  • If possible, move the sensor to a more stable section of the pipe, away from bends or valves.
  • Make sure the sensor is firmly secured at the correct insertion depth and orientation.
Tags: contamination, dirty air, flow spikes, noisy signal, S401, S415, S418, S421, S430, S451, S453, turbulence, unstable flow, unstable readings, vibration