{"product_id":"aht20-i2c-temperature-humidity-sensor-module-high-precision","title":"AHT20 I2C Temperature \u0026 Humidity Sensor – 0.01°C Resolution","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 digital sensor module designed for makers, engineers, and electronics enthusiasts 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 calibrated digital output via a standard I²C interface, making it effortless to integrate into Arduino, Raspberry Pi, ESP32, and other microcontroller projects.\u003c\/p\u003e\n\n\u003cp\u003eBuilt around an advanced ASIC chip combined with a MEMS capacitive humidity sensing element and an on-chip temperature sensing element, the AHT20 outperforms previous-generation sensors in both stability and accuracy — even in demanding or harsh environments.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh Precision:\u003c\/strong\u003e Temperature accuracy ±0.3°C | Humidity accuracy ±2% RH @ 25°C\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUltra-Fine Resolution:\u003c\/strong\u003e 0.01°C temperature | 0.024% RH humidity\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eWide Measurement Range:\u003c\/strong\u003e –40°C to +85°C | 0–100% RH\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eI²C Digital Output:\u003c\/strong\u003e Clean, calibrated signal — no analog conversion needed\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eBroad Supply Voltage:\u003c\/strong\u003e 2.0V–5.5V DC — compatible with 3.3V and 5V systems\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e 15 × 10.5 mm board — fits tight project enclosures\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSMD Package:\u003c\/strong\u003e 3×3 mm flat pin-less profile suitable for reflow soldering\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMaterials:\u003c\/strong\u003e Metal \u0026amp; Plastic construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"padding:8px; border:1px solid #ddd; text-align:left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding:8px; border:1px solid #ddd; text-align:left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAHT20\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.0–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHumidity Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0–100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e–40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e±2% RH (@ 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e±0.3°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTemperature Resolution\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0.01°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHumidity Resolution\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0.024% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOutput Signal\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eI²C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePin Count\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4 (VIN, GND, SCL, SDA)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBoard Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e15 × 10.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePackage Contents\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1× AHT20 Sensor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePin Definitions\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin 1 – VIN:\u003c\/strong\u003e Supply voltage input\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\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp\u003eThe AHT20 sensor is purpose-built for a wide range of electronics and automation projects:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHVAC systems \u0026amp; smart climate control\u003c\/li\u003e\n  \u003cli\u003eWeather stations \u0026amp; environmental monitoring\u003c\/li\u003e\n  \u003cli\u003eDehumidifiers \u0026amp; humidistats\u003c\/li\u003e\n  \u003cli\u003eData loggers \u0026amp; test equipment\u003c\/li\u003e\n  \u003cli\u003eHome automation (Arduino, ESP32, Raspberry Pi)\u003c\/li\u003e\n  \u003cli\u003eConsumer electronics \u0026amp; appliances\u003c\/li\u003e\n  \u003cli\u003eAutomotive climate sensing\u003c\/li\u003e\n  \u003cli\u003eCleanrooms \u0026amp; laboratory monitoring\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-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-300mm-adjustable-pcb-holder-360-rotation-soldering-stand-clamp\"\u003e0–300mm PCB Holder Stand | 360° Rotation Soldering Clamp\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 technical guidance on calibration and accuracy standards for measurement instruments, visit the \u003ca href=\"https:\/\/www.nist.gov\/calibrations\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNational Institute of Standards and Technology (NIST) – Calibrations\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Slight color variations may occur due to monitor brightness settings. Please allow minor measurement deviations for dimensional data.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the AHT20 sensor compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The AHT20 uses a standard I²C interface and operates at 2.0–5.5V DC, making it fully compatible with Arduino, Raspberry Pi, ESP32, ESP8266, and virtually any microcontroller with I²C support. Many popular Arduino and Python libraries already support the AHT20 natively.\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 change the sensor can detect — 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. This sensor offers excellent resolution for fine-grained readings and solid accuracy for reliable real-world measurements.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this sensor be used outdoors or in harsh environments?\u003c\/h4\u003e\n\u003cp\u003eA: The AHT20 is engineered for improved stability in challenging conditions and covers a wide range of –40°C to +85°C and 0–100% RH. For prolonged outdoor deployment, it is recommended to house the module in a protective enclosure to shield it from direct moisture, condensation, and contaminants.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the 4 pins on the AHT20 module?\u003c\/h4\u003e\n\u003cp\u003eA: The module has four pins: \u003cstrong\u003eVIN\u003c\/strong\u003e (supply voltage 2.0–5.5V), \u003cstrong\u003eGND\u003c\/strong\u003e (ground), \u003cstrong\u003eSCL\u003c\/strong\u003e (I²C serial clock), and \u003cstrong\u003eSDA\u003c\/strong\u003e (I²C serial data). Connect VIN and GND to your power supply, and SCL\/SDA to the corresponding I²C pins on your microcontroller.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the AHT20 sensor compatible with Arduino and Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The AHT20 uses a standard I²C interface and operates at 2.0–5.5V DC, making it fully compatible with Arduino, Raspberry Pi, ESP32, ESP8266, and virtually any microcontroller with I²C support. Many popular Arduino and Python libraries already support the AHT20 natively.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between accuracy and resolution on the AHT20?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Resolution refers to the smallest change the sensor can detect — 0.01°C for temperature and 0.024% RH for humidity. Accuracy refers to how close the reading is to the true value — ±0.3°C for temperature and ±2% RH for humidity at 25°C. This sensor offers excellent resolution for fine-grained readings and solid accuracy for reliable real-world measurements.\"}}, {\"@type\": \"Question\", \"name\": \"Can this sensor be used outdoors or in harsh environments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The AHT20 is engineered for improved stability in challenging conditions and covers a wide range of –40°C to +85°C and 0–100% RH. For prolonged outdoor deployment, it is recommended to house the module in a protective enclosure to shield it from direct moisture, condensation, and contaminants.\"}}, {\"@type\": \"Question\", \"name\": \"What are the 4 pins on the AHT20 module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module has four pins: VIN (supply voltage 2.0–5.5V), GND (ground), SCL (I²C serial clock), and SDA (I²C serial data). Connect VIN and GND to your power supply, and SCL\/SDA to the corresponding I²C pins on your microcontroller.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"AHT20 I2C Temperature \u0026 Humidity Sensor – 0.01°C Resolution\", \"item\": \"https:\/\/oasis-select.com\/products\/aht20-i2c-temperature-humidity-sensor-module-high-precision\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"one size","offer_id":47755490295913,"sku":"14:200005536#one size","price":3.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S56734fe894b4400489834ac2621ceef7I.webp?v=1783269659","url":"https:\/\/oasis-select.com\/products\/aht20-i2c-temperature-humidity-sensor-module-high-precision","provider":"Oasis Select","version":"1.0","type":"link"}