Dwyer Instruments Series CDTA carbon dioxide transmitter

Dwyer Instruments has released the Series CDTA carbon dioxide, humidity and temperature detector. The product combines carbon dioxide, humidity, temperature, occupancy override and temperature setpoint measurements in one compact device.

Field-selectable BACnet or Modbus communications transmits the measurements to the building controller and allows for the transmitters to be daisy-chained with other communicating sensors. Combination sensors reduce installation and wiring cost, along with requiring less I/O on the controller to save additional hardware costs.

Carbon dioxide measurements are taken using the company’s single-beam, dual-wavelength non-dispersive infrared (NDIR) sensor. Humidity measurements are measured using a capacitive polymer sensor and the temperature is recorded by a solid-state band gap sensor. Local configuration of the temperature setpoint and override can be done using the buttons on the side of the detector and the optional integral or remote LCD.