The new KOBOLD MAK digital mass flow meters have been specifically developed for gas measurement. They provide both high accuracy/reliability and a rugged housing. The MAK is equipped with an indicator that employs a proven flow sensor. It offers an integrated flow rate indication in addition to the instantaneous flow rate. An optional needle valve is also available.
Principle of Operation
As the gas flows, the differential pressure between P1 and P2 causes a small amount of gas to flow through the overhead measuring tube. The separation ratio is constant. Two resistance temperature detectors (RTD elements,) transferring a constant amount of heat to the gas stream, are mounted on the measuring tube. The flow causes the gas molecules to absorb and transport the heat away. This creates a temperature difference between the two detector coils, which causes a change in resistance in the detector coils, whereby R1 <> R2. The electronics converts the signal for indication. The temperature difference increases as the flow increases.
Product Specifications
Measuring Range
0...10 Nml/min, 0...50 to 0...200 Nl/min, 0...300 to 0...500 Nl/min
Accuracy
±1...1.5 % of Full Scale
Maximum Temperature
50 °C
Process Connection
¼ ... ½" Compression Fitting or ¼" NPT
Wetted Material
Stainless Steel
Output
4-20 mA, 0-5 / 1-5 V, or Modbus
Media Category
Various Gas Types, Menu-Selectable
Product Features
Direct Mass Flow Measurement
No Pressure or Temperature Correction Needed
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