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CalFlo CFAS Thermal Mass Air Flow Switch

CalFlo CFAS Thermal Mass Air Flow Switch

The CalFlo CFAS Thermal Mass Air Flow Switch features a broad measuring range and LED output display. Ideal for small pipe and low flow applications, the CalFlo CFAS is a compact inline air flow switch that will accurately monitor a variety of gaseous media.


  • Vent Gas
  • Wet Stack Gas
  • Sample Line Flow
  • Nitrogen Blanket Flow

Principle of Operation

Completely encapsulated in epoxy resin, the CFAS features a broad measuring range, LED output display and is well-suited for small pipes up to 3/4" in diameter. Typical applications include vent gas, wet stack gas, sample line flow, purge flow, nitrogen blanket flow and many others. Select the appropriate configurations based on your application or contact our Application Specialist for additional assistance.

  • Ideal for Small Pipe and Low Flow Applications
  • Rugged Industrial Design
  • Compact, No Additional Parts
  • Features LED Output Display
  • Temperature Compensated

Medium: Compatible Gases
Repeatability: < 1 %
Measuring Range: 1.5-65 fps (0.5 - 20 mps)
Switching Hysteresis: < 20%

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