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Aeroqual 4-20mA and Relay Output

Product Information

Specto Technology is proud to offer the Aeroqual 4-20mA and Relay Output – which is designed to be configured with a Crevis controller and Crevis output cards.


  • Aeroqual 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.4-20 mA output allows connection to a PLC or sensing device to provide ozone concentration information for applications such as health and safety monitoring.
  • 4-20mA output channels can be set to read a user defined parameter and range.
  • Easily configurable via Aeroqual Cloud and Connect.


  • Relay output channels have configurable set points and reset points.
  • Used for integration with industrial PLC/SCADA networks.


  • Health monitoring
  • Safety Monitoring

Helpful Videos


CREVIS-ST-4214-4x-4-20mA-output Datasheet
CREVIS-ST-2742-2x-relay-output Datsheet
CREVIS-Modbus-NA_9171-controller Datasheet