CalFlo™ CFTM, Flocorp-Thermal Mass Flow and Temperature Meter

CalFlo™ CFTM Thermal Mass Flow and Temperature Meter

Accurate measurement in air conditioning, dust collection, ventilation, energy consumption, potable/non-potable water, acid, oil, gas, and other applications can be accomplished by CalFlo calorimetric flow meters. These meters are easy to install and their high-quality construction will withstand industrial use.

The CalFlo™ CFTM Thermal Mass Flow and Temperature Meter represent 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. 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.

Features and Benefits

  • Standard patent-pending auto-calibration (no temperature drift)
  • Separate adjustments for temperature and flow (Modbus version)
  • Counter totalizer (Modbus version)
  • The choice between Modbus RTU Output or 4-20mA
  • Encapsulated for vibration resistance
  • Withstands up to 1400 psi static pressure
  • No moving parts


ServiceOil or water-based solutions
Measuring Velocity Range

0.25 -10ft/sec (7.62-350 cm/s), auto-


Set-point Range5% to 90% of maximum flow
Process Temperature-4ºF to 175ºF (-20ºC to 90ºC)
PressureUp to 1,400 PSI (100 bar)
Response TimeMax 5 seconds normal flow
Linearity Deviation< 5%
Repeatability< 2%
Protection ClassIP65


Housing Material

PBTP, glassfibre reinforced (Ultradur®)



Sensor Probe

Standard: Stainless Steel (WN1.4305 V2A, 303 Ti)

Optional: stainless steel ( WN 1.4571 V4A , 316 Ti ), Titanium, Hastelloy C4 and Hastelloy C22

Thread1/2” NPT
ConnectionM12-plug, 5-Pin
Operating Voltage19 to 30VDC, incl. residual ripple
Ambient Temperature-4ºF to 158ºF (-20ºC to 70ºC)
Initial OperationApprox. 10s after connection of power

Download Datasheet: CalFlo™ CFTM, Flocorp-Thermal Mass Flow and Temperature Meter