UK made: Low power CO2 sensor gets I2C interface

“An I²C interface will simplify the design process of integrating the sensor with other sensors and devices all on the I²C bus,” said GSS CEO Calum MacGregor.

Inside, the sensors are built using LEDs made in Cumbernauld, which are optimised for non-dispersive infra-red absorption measurement at 4.2-4.4μm wavelengths.

The LEDs use very little power and turn on almost instantly, enabling sensor readings to be made in a few seconds, according to the firm: “As a result, GSS has pioneered the development of wireless monitors that measure CO₂ levels as well as temperature and humidity with a battery life of over ten years.”

Expected sensor lifetime is greater than 15 years – suiting them to fit-and-forget applications measuring ambient CO₂ levels from up to 1%, it added.

Applications are foreseen in IoT-based monitoring for HVAC (heating ventilation and air conditioning), indoor air quality), in smart homes and smart offices. Battery power removes the need for cabling and, in retrofit installation, redecoration.

The sensor will be on booth C5366 at the AHR Expo in Atlanta next week.