DHT11 Temperature and Humidity Sensor Module KY-015

DHT11 Temperature and Humidity Sensor Module – KY-015 Digital Sensor for Arduino

The KY-015 DHT11 Temperature and Humidity Sensor Module is a compact digital sensor designed to measure ambient temperature and relative humidity with stable and reliable performance. It converts real-world environmental conditions into a digital signal that can be easily processed by microcontrollers such as Arduino, ESP32, and Raspberry Pi.

Temperature and humidity are closely related to everyday comfort, environmental monitoring, and automation systems. The DHT11 sensor measures air temperature and relative humidity (%RH), making it suitable for applications such as indoor climate monitoring, weather stations, smart home systems, and educational projects.

The module uses a single-wire digital interface, allowing easy integration with minimal wiring. Its small size and low power consumption make it ideal for embedded systems and beginner-friendly electronics projects.

Key Features

• Digital temperature and humidity sensor

• Measures ambient air temperature and relative humidity

• Digital output signal for easy microcontroller processing

• Simple single-wire communication interface

• Low power consumption

• Compact and lightweight design

Technical Specifications

• Model: KY-015

• Sensor Type: DHT11

• Temperature Range: 0 °C to +50 °C

• Humidity Range: 20% to 90% RH

• Temperature Accuracy: ±2 °C

• Humidity Accuracy: ±5% RH

• Operating Voltage: 3.3 V – 5 V

• Output Type: Digital signal

• Response Time: Fast response for real-time monitoring

Understanding Temperature and Humidity

• Temperature is a fundamental physical quantity that affects most physical and chemical processes, as well as human comfort.

• Humidity refers to the amount of water vapour present in the air, commonly expressed as relative humidity (%RH).

• Relative humidity is closely linked to temperature — warmer air holds more moisture, while cooler air increases relative humidity.

Typical comfort ranges for people:

• Winter: 18–25 °C, 30–80% RH

• Summer: 23–28 °C, 30–60% RH

• Air-conditioned rooms: 19–24 °C, 40–50% RH

Typical Applications

• Indoor climate monitoring

• Smart home and automation systems

• Weather stations

• Environmental data logging

• Arduino, ESP32, and IoT projects

• Educational and training kits

The KY-015 DHT11 Temperature and Humidity Sensor Module is an excellent choice for basic environmental sensing applications where simplicity, reliability, and ease of use are required.