AM2302 / DHT22 Temperature and Humidity Sensor Module
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৳ 200.00৳ 250.00 (-20%)
The DHT22 / AM2302 Digital Temperature and Humidity Sensor Module is a high-precision, low-cost climate monitoring breakout board designed for stable, long-term environmental tracking. Superior to the basic DHT11, this sensor delivers highly accurate relative humidity and ambient temperature data via a single-bus digital signal. Pre-mounted on a convenient 3-pin PCB with an integrated pull-up resistor, it operates smoothly on both 3.3V and 5V logic.
The DHT22 / AM2302 Digital Temperature and Humidity Sensor Module is a high-accuracy, calibrated climate sensor breakout board designed for precise environmental monitoring. Equipped with a dedicated digital signal acquisition technique and built-in temperature and humidity sensing technology, this module ensures outstanding long-term stability, high reliability, and rapid response times in dynamic conditions.
📈 Superior High-Precision Climate Performance
Compared to its smaller counterpart, the standard DHT11, the DHT22/AM2302 offers significantly expanded measuring ranges and much tighter error tolerances, making it a reliable solution for professional makers:
- Humidity Monitoring: Measures relative humidity (RH) across a full scale from 0% to 100% with a strict accuracy tolerance of ±2% to 5% RH.
- Temperature Monitoring: Tracks ambient thermal conditions across an extensive range of -40°C to +80°C with an excellent accuracy rating of ±0.5°C.
- Digital Output Calibration: Every single module undergoes precise calibration in a specialized laboratory. The calibration coefficients are safely saved in internal OTP memory, ensuring your microcontroller receives pre-processed, accurate data.
🛠️ Developer-Ready Breakout Board
Standard raw DHT22 sensors require users to manually calculate and solder an external pull-up resistor between the power and data lines to avoid data corruption. This convenient breakout board simplifies the process:
- Onboard Resistors: Features integrated surface-mount resistors and capacitors to filter out line noise and stabilize data streams right out of the box.
- Simple 3-Pin Interface: Breaks down into three clearly labeled pins for quick vertical insertion into standard breadboards or jumper wires:
- DAT (Data): Single-bus digital signal pin utilizing a proprietary single-wire protocol to communicate with your host microcontroller.
- VCC: Power input supporting a flexible 3.3V to 5.5V range, ensuring flawless compatibility with low-power ESP32/ARM boards as well as standard 5V Arduino setups.
- GND: Shared system ground reference.
💡 Multi-Industry Applications
- Automated Greenhouse Control: Track real-time localized microclimates to automatically activate exhaust fans, humidifiers, or automated drip-irrigation pumps.
- Smart Home Thermostats: Build custom HVAC monitoring nodes that adjust central cooling or heating zones based on precise local humidity and thermal metrics.
- Weather Stations & Data Loggers: Act as the foundational atmospheric monitoring element for off-grid IoT weather nodes and environmental tracking hubs.
- Server Room & Storage Vaults: Prevent hardware degradation or material mold growth by continuously monitoring ambient humidity inside enclosed cabinets.
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