SKU: SENS-3041
📋 GST Invoice Available

DFRobot Gravity AHT20 Temperature Humidity Sensor - I2C Interface

₹529.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Gravity AHT20 is a digital temperature and humidity sensor module featuring an I2C interface, compatible with 3.3V/5V logic systems like Arduino, Raspberry Pi, ESP32, and STM32. It provides high-precision environmental monitoring from -40°C to +85°C.

Features

  • High-precision MEMS capacitive humidity sensing element with ±0.1% RH non-linearity.
  • Wide operating voltage range from 2V to 5V DC for flexible system integration.
  • Standard I2C digital output with a fixed address of 0x38 for simple daisy-chaining.
  • Excellent long-term stability with minimal drift (<0.04°C/year).
  • Gravity 3-pin interface for plug-and-play connectivity without soldering.

Out of stock

Description

The AHT20 sensor module integrates an advanced MEMS semiconductor capacitive humidity sensor and a calibrated digital temperature sensor. It communicates via a standard I2C interface, providing reliable digital readings with a temperature resolution of 0.01°C. The sensor’s simple peripheral circuit and robust design ensure stable performance even in harsh environmental conditions across its full -40°C to +85°C operating range.

This module is part of DFRobot’s Gravity ecosystem, featuring a standardized 3-pin connector for immediate plug-and-play use with various microcontroller boards. Its low power consumption and digital output make it ideal for precision environmental monitoring in embedded systems and data acquisition setups.

Key Features

  • Digital I2C output ensures noise-resistant communication with microcontrollers.
  • Wide 2V to 5V supply voltage compatibility suits both 3.3V and 5V logic systems.
  • Improved MEMS capacitive sensing element offers high accuracy and fast response.
  • Designed for stable operation in demanding environments from -40°C to +85°C.
  • Gravity interface enables quick prototyping without soldering or complex wiring.
  • Low long-term drift specification guarantees measurement consistency over time.
  • Compact form factor (30mm x 20.5mm) allows for easy integration into space-constrained projects.

Applications

  • Precision environmental monitoring in HVAC and building automation systems.
  • Data logging for climate control in greenhouses and agricultural environments.
  • Condition monitoring within electronic enclosures and server racks.
  • Integration into portable weather stations and home automation projects.
  • Automotive cabin climate and battery management system sensing.

Technical Specifications

BrandDFRobot
ProductGravity AHT20 Temperature and Humidity Sensor
Operating VoltageDC 2V to 5V
Output SignalI2C
I2C Address0x38
Temperature Range-40°C to +85°C
Temperature Resolution0.01°C
Temperature Hysteresis±0.1°C
Humidity Non-linearity±0.1 %RH
Response Time5s (Min) to 30s (Max)
Long-term Drift<0.04°C/year
Dimensions (L x W)30mm × 20.5mm (1.18" × 0.81")
Shipping Weight0.011 kg
Shipping Dimensions6 × 6 × 3 cm

Frequently Asked Questions

What is the I2C address of the DFRobot AHT20 sensor?

The DFRobot Gravity AHT20 sensor has a fixed I2C address of 0x38. This address is hard-coded and cannot be changed, which should be considered when designing systems with multiple I2C devices to avoid address conflicts.

What is the operating voltage range for this sensor?

This sensor module operates from a wide voltage range of 2V to 5V DC. This makes it directly compatible with both 3.3V and 5V logic microcontroller platforms like Arduino, ESP32, Raspberry Pi, and STM32 without requiring a logic level shifter.

Does this sensor require any calibration or special wiring?

The sensor is factory calibrated and ready to use. It features DFRobot's Gravity 3-pin interface (Signal, VCC, GND), allowing for plug-and-play connection to compatible shields or boards without any soldering. Simply connect to the I2C pins of your microcontroller.

What is the measurement range and accuracy of the AHT20?

The sensor measures temperature from -40°C to +85°C with a resolution of 0.01°C and provides humidity readings. It features excellent long-term stability with a drift of less than 0.04°C per year and a fast response time between 5 to 30 seconds.

Package Includes

  • 1 x DFRobot Gravity AHT20 Temperature and Humidity Sensor

Additional Information

Weight 0.011 kg
Dimensions 3 × 2.05 cm