MST300-Compact Panel Mounted Flow Controller

The MST300 flow controller is available in conjunction with the flow sensor for a wider range of flowmeter coefficients, from 0.01 to 9999.99 pulses per liter. The cumulant value can be up to 15 digits, ensuring the control operation of the convective quantity value for a long time.

Working with FTB/FGR series


  1. 6-digit LED display

  2. Flow rate/total flow display

  3. 1 pulse counting input

  4. 1 relay (REL) output

  5. 24V DC power supply output

  6. RS-485 / Modbus RTU


Specification Table

Order No

Supply voltage19...50Vdc,16...35Vac or 85...260Vac/Vdc
Power consumptionMax. 4.5VA
ShowRedled, high6x9mm
Display value range0...999999 +decimal point
Instantaneous flow reading accuracyChoose0.0.00000unit
Flow accuracy ± 1 arrive± 0.0001optional
Potential isolation of pulses by corresponding vibration damping, input frequencyMax. 10.0 kHz;
Cumulative reset: active edge or active level, galvanically isolated
Cumulative capacityMore than the4x109 m3 (max. 15effective number)
Display unit
Instantaneous flow L orm3 /seconds, minutes, hours
Accumulation L orm3
Pulse wait width0.1.39.9seconds can be set
Output type
Relay outputImax =1A,umax=250Vac (cosΦ=1)
Sensor power output24Vdc +5%/-10%, Max. 100 mA (Regulated voltage, no need to isolate from communication interface)
Communication InterfaceRS-485,8N1and8N2,1200...115200 bit/s;
Modbus RTU(without galvanic isolation)
Operating temperature0...+50°C
Degree of protectionIP65(Add protective film to the display panel);IP20(Housing and connection clip)
Meter size (longxWidthxhigh)72 x 36 x 97mm
Installation depthMin. 102mm
Plate thicknessMax. 5mm