{"product_id":"aht20-i2c-temperature-humidity-sensor-module-high-precision","title":"AHT20 I2C Temperature \u0026 Humidity Sensor – 0.01°C Precision","description":"\n\u003ch2\u003eAHT20 I2C Temperature \u0026amp; Humidity Sensor Module\u003c\/h2\u003e\n\u003cp\u003eMeet the next-generation \u003cstrong\u003eAHT20 I2C Temperature and Humidity Sensor\u003c\/strong\u003e — a compact, high-precision sensing module engineered for makers, engineers, and electronics hobbyists who demand reliable environmental data. With a temperature resolution of \u003cstrong\u003e0.01°C\u003c\/strong\u003e and humidity resolution of \u003cstrong\u003e0.024% RH\u003c\/strong\u003e, this sensor delivers exceptionally accurate calibrated digital output through a standard I²C interface, making integration with microcontrollers like Arduino, ESP32, and Raspberry Pi straightforward and efficient.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the AHT20 Sensor?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-High Precision:\u003c\/strong\u003e Temperature accuracy of ±0.3°C and humidity accuracy of ±2% RH at 25°C for trustworthy readings every time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Range:\u003c\/strong\u003e Measures temperatures from -40°C to +85°C and humidity from 0–100% RH — suitable for demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact SMD Package:\u003c\/strong\u003e Double-row flat pin-less SMD design (15 × 10.5 mm board, 3×3 mm sensor footprint) fits easily into tight enclosures and PCB layouts.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced ASIC Chip:\u003c\/strong\u003e Integrates a new-generation ASIC with an improved MEMS capacitive humidity element and an on-chip temperature sensing element for stable, drift-resistant performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI²C Digital Output:\u003c\/strong\u003e Outputs fully calibrated digital signals — no analog conversion needed. Plug in VIN, GND, SCL, and SDA, and you're reading data instantly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Supply:\u003c\/strong\u003e Operates on 2.0–5.5V DC, compatible with 3.3V and 5V systems alike.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReflow Solderable:\u003c\/strong\u003e SMD form factor supports reflow soldering for seamless PCB production.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAHT20\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±2% RH (at 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.3°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.01°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.024% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eI²C digital signal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterials\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetal, Plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBoard Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 × 10.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × AHT20 Sensor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePin Definition\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin 1 – VIN:\u003c\/strong\u003e Supply voltage (2.0–5.5V DC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin 2 – GND:\u003c\/strong\u003e Power ground\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin 3 – SCL:\u003c\/strong\u003e Serial clock line (bidirectional)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin 4 – SDA:\u003c\/strong\u003e Serial data line (bidirectional)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThe AHT20 sensor is ideal for a wide range of projects and industries:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHVAC systems and dehumidifiers\u003c\/li\u003e\n  \u003cli\u003eWeather stations and data loggers\u003c\/li\u003e\n  \u003cli\u003eConsumer electronics and household appliances\u003c\/li\u003e\n  \u003cli\u003eAutomotive climate monitoring\u003c\/li\u003e\n  \u003cli\u003eAutomated control systems\u003c\/li\u003e\n  \u003cli\u003eTest and detection equipment\u003c\/li\u003e\n  \u003cli\u003eHumidity regulation and environmental monitoring\u003c\/li\u003e\n  \u003cli\u003eLaboratory and industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4-inch-npt-nickel-plated-brass-air-compressor-tank-fill-valve\"\u003e1\/4\" NPT Nickel Plated Brass Air Compressor Tank Fill Valve\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment | Rebar Tie Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-2-inch-drive-wheel-protector-impact-socket-set-storage-case\"\u003e1\/2\" Drive Wheel Protector Impact Socket Set + Storage Case\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More About Environmental Sensing Standards\u003c\/h3\u003e\n\u003cp\u003eFor background on measurement accuracy, calibration standards, and sensor performance benchmarks, visit the National Institute of Standards and Technology (NIST) – Environmental Monitoring.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What microcontrollers is the AHT20 I2C sensor compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The AHT20 sensor communicates via the standard I²C protocol, making it compatible with virtually any microcontroller that supports I²C — including Arduino (Uno, Mega, Nano), ESP8266, ESP32, Raspberry Pi, STM32, and more. Simply connect VIN, GND, SCL, and SDA to the corresponding pins on your board.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between accuracy and resolution on the AHT20?\u003c\/h4\u003e\n\u003cp\u003eA: \u003cstrong\u003eResolution\u003c\/strong\u003e refers to the smallest detectable change the sensor can report — 0.01°C for temperature and 0.024% RH for humidity. \u003cstrong\u003eAccuracy\u003c\/strong\u003e refers to how close the reading is to the true value — ±0.3°C for temperature and ±2% RH for humidity at 25°C. The AHT20's high resolution ensures you can detect very small environmental changes, while its accuracy ensures those readings closely reflect real-world conditions.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this sensor operate in very humid or very cold environments?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The AHT20 is designed for harsh environments, measuring temperatures from -40°C to +85°C and humidity from 0% to 100% RH. Its improved MEMS capacitive sensing element and advanced ASIC chip provide stable, reliable readings across this entire range, making it suitable for outdoor weather stations, refrigeration monitoring, and industrial deployments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is included in the package?\u003c\/h4\u003e\n\u003cp\u003eA: Each order includes 1 × AHT20 I2C Temperature and Humidity Sensor Module, ready to connect to your project. No additional hardware is included; you will need jumper wires or a PCB for integration.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What microcontrollers is the AHT20 I2C sensor compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The AHT20 sensor communicates via the standard I²C protocol, making it compatible with virtually any microcontroller that supports I²C — including Arduino (Uno, Mega, Nano), ESP8266, ESP32, Raspberry Pi, STM32, and more. Simply connect VIN, GND, SCL, and SDA to the corresponding pins on your board.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between accuracy and resolution on the AHT20?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Resolution refers to the smallest detectable change the sensor can report — 0.01°C for temperature and 0.024% RH for humidity. 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