4-20mA and Relay Output

The Dust Monitors can be configured with a Crevis controller and Crevis output cards. The Crevis controller type is Modbus NA-9171 and the mode type is Modbus RTU. The outputs cards are ST-4214 for the 4-20mA outputs and ST-2747 for the relay outputs. The cards offer 4 x 4-20mA and 2 x relay outputs.


  • Easily configurable via Aeroqual Cloud and Connect
  • 4-20mA output channels can be set to read a user defined parameter and range
  • Relay output channels have configurable set points and reset points
  • Used for integration with industrial PLC/SCADA networks

The data sheets can be found below:

Crevis Modbus NA_9171 controller

Crevis ST-4214 4 x 4-20mA output

Crevis ST-2742 2 x relay output

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