Sensirion — SEN55 Indoor Air Quality Sensor

The SEN55 from Sensirion is an all-in-one sensor solution for the accurate measurement of environmental parameters that affect air quality, such as particulate matter, volatile organic compounds (VOCs), oxidizing gases including nitrogen oxides (NOx), as well as relative humidity and temperature.

The SEN55 features proprietary on-chip algorithms that convert raw gas measurement signals into useful information. Outputs supplied over an I2C interface by the SEN55 include:

• VOC and NOx index scores on a scale of 0 to 500
• Concentration of particulate matter to a precision of ±10%. The sensor detects PM1.0, PM2.5, PM4 and PM10 particles
• Relative humidity, accurate to within ±4.5%
• Temperature over a range between -10°C and 50°C

These easy-to-use outputs make for straightforward integration into various applications for measuring air quality. Research suggests that measurement of indoor air quality, and the implementation of measures such as smart ventilation to clean contaminated air, can lead to outcomes such as improved cognitive performance, reduced airborne transmission of disease, and a reduced rate of premature death.

The SEN55 dimensions are 52.8 mm x 43.6 mm x 22.3 mm.