{"title":"Fermion: AHT20 Temperature and Humidity Sensor (Breakout)","handle":"fermion-aht20-temperature-and-humidity-sensor-breakout","url":"/products/fermion-aht20-temperature-and-humidity-sensor-breakout","description":"The Fermion AHT20 is a high-precision, low-cost temperature and humidity sensor breakout from DFRobot. Built around an improved MEMS semiconductor capacitive humidity sensor element, it communicates over a standard I2C interface and operates across a wide 2–5 V supply range.\n\nThe sensor performs reliably across a wide temperature range of −40 °C to +85 °C, making it suitable for environmental monitoring, HVAC systems, weather stations, and data logging applications.\n\nKey Features\n\n\nI2C Digital Output – Simple two-wire interface at address 0x38\n\nWide Voltage Range – 2 V to 5 V DC supply\n\nHigh Precision – ±0.3 °C temperature accuracy, ±2% RH humidity accuracy\n\nExcellent Long-Term Stability – Low drift over time\n\nQuick Response – Strong anti-interference performance\n\nCompact Breakout – 30 mm × 20.5 mm board with standard 2.54 mm header\n\n\nSpecifications\n\n\nOperating Voltage: 2–5 V DC\n\nInterface: I2C (address 0x38)\n\nBoard Dimensions: 30 mm × 20.5 mm (1.18″ × 0.81″)\n\n\nHumidity (AHT20)\n\n\nResolution: 0.024% RH\n\nAccuracy: ±2% RH\n\nRepeatability: ±0.1% RH\n\nHysteresis: ±1% RH\n\nResponse Time: 8 s\n\nOperating Range: 0–100% RH\n\nLong-Term Drift: <0.5% RH/year\n\n\nTemperature (AHT20)\n\n\nResolution: 0.01 °C\n\nAccuracy: ±0.3 °C\n\nRepeatability: ±0.1 °C\n\nHysteresis: ±0.1 °C\n\nResponse Time: 5–30 s\n\nOperating Range: −40 °C to +85 °C\n\nLong-Term Drift: <0.04 °C/year\n\n\nIdeal For\n\nHVAC and climate control systems\nWeather stations and data loggers\nDehumidifier and appliance monitoring\nAutomotive environmental sensing\n\n\nPackage Contents\n\n1× Fermion AHT20 Temperature and Humidity Sensor breakout\n1× 2.54 mm 4-pin header\n\n\nResources\n\nProduct Wiki\n2D Dimensions (PDF)\nCircuit Diagram (PDF)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1977,"title":"Default Title","sku":"DF-SEN0527","price":6.33,"on_sale":false,"in_stock":true,"available_quantity":160,"option1":"Default Title"}]}