Stand-alone carbon dioxide (CO) sensors for use in determining ventilation necessity with HVAC controllers. The sensor measures the CO concentration in the ventilated space or duct. The sensors are used in ventilation and air conditioning systems to control the amount of fresh outdoor air supplied to maintain acceptable levels of CO in the space.

• Provides voltage output based on CO and temperature levels
• Output can be configured using optional software package to provide a more complex ventilation control strategy using CO levels in conjunction with temperature
• Units mount on wall and include temperature sensor