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CalFlo CFTM Thermal Mass Flow and Temperature Meter

CalFlo CFTM Thermal Mass Flow and Temperature Meter

The CalFlo CFTM Thermal Mass Flow and Temperature Meter represents the logical evolution matching modern microprocessor intelligence with over 30 years of thermal flow expertise. With its patent pending auto-self-calibration, the CalFlo CFTM is the first truly "set-it and forget-it" flow and temperature solution. No need for expensive on-going calibration as CFTM is designed to maintain accuracy for many years


  • Air Conditioning
  • Dust Collection
  • Ventilation
  • Energy Consumption
  • Potable / Non-potable Water
  • Oil & Gas

Principle of Operation

With standard features such as highly accurate temperature sensing with auto-self-calibration, it becomes the most exciting flow sensor in decades. The Modbus version presents the user with analog flow and temperature, has a totalizing counter, and provides independent high and low adjustable flow and temperature switches. The analog version provides two independent linear 4-20mA outputs for both flow and temperature. A single potentiometer sets the flow range for analog versions.

  • Standard patent pending auto-calibration (no temperature drift)
  • Separate adjustments for temperature and flow (Modbus version)
  • Counter totalizer (Modbus version)
  • Choice between Modbus RTU Output or 4-20mA
  • Encapsulated for vibration resistance

Measuring Velocity Range: 0.25 -10ft/sec (7.62-350 cm/s), auto-ranging
Response Time: Max 5 seconds normal flow
Service: Oil or water-based solutions
Repeatability: < 2%
Thread: 1/2" NPT

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