AM2301A Digital Temperature & Humidity Sensor Module – High-Accuracy Capacitive HVAC & Weather Station Probe in Pakistan

Overview

When building automated environmental monitoring systems, smart HVAC controllers, or custom weather stations, tracking ambient temperature and relative humidity requires a reliable, pre-calibrated sensor. Standard analog sensors require complex calibration circuits. The AM2301A (also known as DHT21) Digital Temperature & Humidity Sensor Module provides a robust, cost-effective measurement solution, featuring a capacitive humidity sensing element and a precision thermistor paired with an onboard microcomputer for seamless single-bus digital output.

Key Features

• Pre-Calibrated Digital Output: Factory-calibrated sensor outputs a processed digital signal via a single-wire interface, eliminating the need for external analog-to-digital conversion circuitry.

• Dual-Parameter Measurement: Accurately captures both relative humidity (0% to 99.9% RH) and ambient temperature (-40°C to 80°C).

• High Precision & Stability: Delivers dependable long-term stability with tight accuracy tolerances for both climatic and industrial monitoring tasks.

• Enclosed Probe Design: Housed in a clean plastic enclosure with integrated air vents, allowing easy external mounting away from your core electronics to minimize heat interference.

• Microcontroller Friendly: Fully supported by standard DHT libraries across popular development platforms like Arduino, ESP32, and Raspberry Pi.

Technical Specifications

Common Applications

• HVAC & Environmental Control: Monitors climate conditions in indoor greenhouses, server rooms, and residential ventilation systems.

• DIY Weather Stations & Data Loggers: Connects easily to microcontrollers for long-term meteorological tracking and automated home automation triggers.

Note to customers: Ensure correct wiring polarity (VCC, GND, and Data) and check your microcontroller’s pull-up resistor requirements on the single-bus data line for stable communication!