Analog AQI eCO2 TVOC Sensor

Description

Datasheet

The sensor can detect various volatile organic compounds (VOCs) in an airspace. The device is suitable for ceiling or wall mount applications. Place the sensor in a suitable location where occupant respiratory health is critical.

The sensitivity can be adjusted with a simple jumper position. This selection changes the gain of an analog amplifier. Choose a gain suitable for typical range of VOC concentration. A high gain will detect lower concentrations. Whereas a lower gain will minimize noise in the signal.

The output mode can be changed from a continuously varying analog signal to a digital signal. The digital signal is produced by a comparator with a threshold at half scale (i.e. 5V) or quarter scale (i.e. 2.5V). Use the analog mode to continuously monitor concentration or air quality index. Or use the digital mode to trigger actuators or notifications at a specific threshold.

Changing the sensitivity and choosing the digital output scale can adjust the event threshold. Setting sensitivity high and digital scale low will reduce the event threshold to a minimum and detect the smallest concentrations. Whereas, setting sensitivity low and digital scale high will increase the threshold to a maximum and detect only the most severe air quality hazards.