DFRobot Fermion AHT20 Temperature Humidity Sensor Breakout - I2C Interface
DFRobot Fermion AHT20 Temperature Humidity Sensor Breakout - I2C Interface - Image 2
DFRobot Fermion AHT20 Temperature Humidity Sensor Breakout - I2C Interface - Image 3
DFRobot Fermion AHT20 Temperature Humidity Sensor Breakout - I2C Interface - Image 4
SKU: SENS-3043
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DFRobot Fermion AHT20 Temperature Humidity Sensor Breakout - I2C Interface

₹469.00 (Inclusive of all taxes)
Out of Stock

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

Features

  • High-precision digital MEMS capacitive humidity and temperature sensor
  • Standard I2C interface with address 0x38 for easy daisy-chaining
  • Wide operating voltage range from 2V to 5V DC
  • Excellent long-term stability and strong anti-interference capability
  • Compact breakout board format for rapid prototyping

Out of stock

Description

The Fermion AHT20 sensor breakout integrates the AHT20 chip, an improved MEMS semiconductor capacitive humidity sensor element paired with a band-gap temperature sensor. This combination delivers calibrated digital output via I2C, minimizing the need for external signal conditioning.

Designed with a simple peripheral circuit, the module maintains stable performance across a broad operating temperature range from -40°C to +85°C, making it suitable for applications in challenging environments. Its low power consumption and digital interface simplify integration into IoT nodes, environmental monitoring stations, and embedded control systems.

Key Features

  • Digital I2C output ensures noise-resistant communication with microcontrollers.
  • Wide supply voltage range (2V to 5V) supports both 3.3V and 5V logic systems.
  • High relative humidity resolution of 0.024% RH for detailed environmental tracking.
  • Low hysteresis (±1% RH) and non-linearity (±0.1% RH) enhance measurement accuracy.
  • Fast response time of 8 seconds provides timely updates on ambient conditions.
  • Robust MEMS construction offers excellent long-term stability and durability.
  • Compact breakout board includes necessary pull-up resistors and decoupling capacitors.
  • Operational range from -40°C to +85°C suits industrial and automotive applications.

Applications

  • HVAC system environmental monitoring and control
  • In-cabin temperature and humidity logging for automotive telematics
  • IoT weather stations and smart home climate management
  • Server rack and electronics cabinet environmental sensing
  • Agricultural greenhouse monitoring and automated climate control

Technical Specifications

Manufacturer / BrandDFRobot
Model / SeriesFermion AHT20 Breakout
Sensor TypeDigital Temperature & Humidity
Sensing PrincipleMEMS Capacitive (Humidity), Band-Gap (Temperature)
InterfaceI2C
I2C Address0x38
Operating Voltage2V to 5V DC
Temperature Range-40°C to +85°C
Humidity Range0% to 100% RH (typical)
Humidity Resolution0.024% RH
Humidity Hysteresis±1% RH
Humidity Non-linearity±0.1% RH
Response Time8 s
Dimensions (L x W x H)Approx. 5 cm x 5 cm x 1 cm
WeightApprox. 0.02 kg

Frequently Asked Questions

What is the I2C address of the DFRobot AHT20 breakout module?

The module uses a fixed I2C address of 0x38. This address is hardware-configured, allowing for easy daisy-chaining with other I2C peripherals without address conflicts in typical setups.

What is the operating voltage range for this sensor?

The AHT20 breakout operates from a wide DC voltage range of 2V to 5V. This makes it directly compatible with both 3.3V and 5V microcontroller systems like Arduino, ESP32, and Raspberry Pi without requiring a logic level shifter.

How accurate and stable is the humidity measurement?

The sensor features high long-term stability, a resolution of 0.024% RH, and low hysteresis (±1% RH). Its calibrated digital output and MEMS capacitive design provide reliable, repeatable readings suitable for precision environmental monitoring applications.

Can this sensor be used outdoors or in harsh conditions?

Yes, its operating temperature range of -40°C to +85°C and robust design allow for stable performance in demanding environments. However, for prolonged outdoor use, consider a protective enclosure to shield the PCB from direct moisture and contaminants.

Package Includes

  • 1 x Fermion AHT20 Temperature and Humidity Sensor Breakout Board

Additional Information

Weight 0.02 kg
Dimensions 5 × 5 × 1 cm

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