SGP41-D-R4

The SGP41 is Sensirion’s new VOC and NOx sensor designed as digital smart switch and regulation unit for air treatment devices such as air purifiers. The two sensor signals processed by Sensirion’s powerful gas index algorithm can be directly used to automatically trigger the removal of indoor air gas pollutants by air treatment devices without the need for user–device interaction. This sensor solution is thus well-suited for constantly monitoring the VOC and NOx situation including potentially harmful events which are not perceived by humans. Furthermore, an automatic control of air treatment devices based on the SGP41 signals helps to save energy by turning them off once the VOC and/or NOx events have been taken care off. SGP41 offers a solution for two complete sensors on a single chip facilitating design-in and saving design costs. Thanks to its very small DFN package (2.44 x 2.44 x 0.85 mm3) the sensor can be designed into applications with limited spaces.

• I2C interface
• Supply voltage range from 1.7 to 3.6V
• Current consumption of 3.2 to 4.5mA (at 3.3 or 1.8V respectively)
• Measurement range: 0 to 1,000ppm of ethanol equivalents, 0 to 10ppm of NO2 equivalents
• Sensor output: 2 digital 16bit raw signals
• Digital VOC and NOx index signals processed output
• Response time: <lt/> 10s (tau 63%) for VOC measurements, <lt/> 250s (tau 63%) for NOx measurements
• Switch-on time of <lt/> 60s
• On-chip humidity compensation
• Used in air purifiers, air exchange units, demand-controlled ventilation and kitchen hoods