SINGLE flow meters of the DFM4 product lines measure the flow rate of temperature and cooling circuits. For applications using water as a transfer medium, DFM4 monitors the flow rate and measures medium temperatures up to 200 °C. Used for applications with heat transfer oil, the flow meter measures temperatures of up to 350 °C. The DFM4 flow meter offers comprehensive process information as well as monitoring and alarm functions.

In contrast to many conventional flow meters used for temperature control applications, SINGLE DFM4 operates without moving components and measures the flow rate by means of the differential pressure across an orifice plate. Hence, it is virtually maintenance-free and unaffected by contamination.

The flow rate can be displayed in l/min or m³/h as required. The temperature is displayed in °C. A variety of different metering ranges are available for both water and oil as transfer media. Each DFM4 flow meter is delivered with technical documentation including CE mark and factory certification.

Standard equipment


  • Circulating medium water up to 90 °C
  • Completely assembled
  • Compact design
  • Flow pipe made from stainless steel

    Electrical and control equipment

    • 2 m connecting cable
    • 24 V supply voltage
    • Programmable limit values for flow rate and temperature with optical signal and relay output

    Design options

    • Circulating medium water up to 200 °C (modular design with capillary pipe coil)
    • Circulating medium heat transfer oil up to 350 °C (modular design with capillary pipe coil)
    • Variety of different metering ranges from 20 to 1,000 l/min max.
    • Different hydraulic connections


    • Capillary pipe coil for temperatures above 90 °C
    • 230 V power supply unit
    • Analogue output 4...20 mA for flow rate
    • Replication with factory certificate

    Data sheet