The HM3301 sensor determines the fine dust particle concentration in the air using the scattered light method from a particle size of 0.3 µm. With this sensor you are able to provide real-time readings as well as continuous measurements and then send them via the I2C interface to the connected microcontroller. Specifications - concentration: 1 µg / m³ (particles / 100 cm³) - measurable particle size: 3 channels: 2.5 µm, 5 µm, 10 µm - measuring range (PM2.5 standard value) - measuring range: 1 - 500 µg/m³ (effective range) - Measuring range: 1000 µg/m³ (Maximum range) - Start-up time: 30 seconds after power-on - Operating temperature: -10 ... +60 °C - Operating humidity: 10 ... 90% relative humidity (non-condensing) - Interface: I2C (0x40) - operating voltage: 3.3 V / 5 V - dimensions (LxWxH): 41 x 64.5 x 17 mm https://elecena.pl/product/21849789/sen-hm3301-arduino-fine-dust-sensor-hm3301 2022-10-16 https://elecena.pl/product/21849789/sen-hm3301-arduino-fine-dust-sensor-hm3301 2023-03-19