Go Direct^® CO₂ Gas Sensor (GDX-CO2)—current version

• We currently sell the Go Direct CO₂ Gas sensor, which was first sold in 2018.
• This sensor can connect via USB or Bluetooth. No interface is required.
• Sensor User Manual

CO₂ Gas Sensor (CO2-BTA)—current version

• Sensors sold from June of 2023 are black with a rounded top. The label is red with white lettering. 
• This sensor requires an interface (e.g. Go!Link or LabQuest Mini).
• Sensor User Manual

CO2-BTA—sold from May 2007 to May 2023

• Sensors sold from May 2007 to May of 2023 have a round top, and are black with a black label with white lettering. Two red o-rings frame the label. 
• This sensor requires an interface (e.g. Go!Link or LabQuest Mini).
• Sensor User Manual

CO2-BTA—sold before April 2007

• Sensors sold before April 2007 are rectangular in shape with a sensor shaft extending from the box. They are black with a white label with teal lettering.
• This sensor requires an interface (LabQuest Mini). It cannot be used with a Go!Link interface.
• Sensor User Manual

Note: An even earlier version of this box style sensor, last sold in the late 1990’s, used a 5-pin DIN connector and did not auto-ID.