DHT11:

Features:

• Full-Scale Calibration: The DHT11 is a digital temperature and humidity sensor with full-scale calibration.
• Digital Output: Provides digital output for both temperature and humidity measurements.
• Humidity Measurement Range: Covers 20% to 90%RH (with 0-50°C temperature compensation).
• Temperature Measurement Range: 0°C to +50°C.
• Humidity Measurement Accuracy: ±5.0%RH.
• Temperature Accuracy: ±2°C.
• Response Time: Less than 5 seconds.
• Low Power Consumption.

Parameters:

• Power Supply Voltage: 3.3V to 5.5V DC.
• Output: Single-bus digital signal.
• Measuring Range: 20-90%RH humidity, 0-50°C temperature.
• Measurement Accuracy: ±5%RH (humidity), ±2°C (temperature).
• Resolution: 1%RH (humidity), 1°C (temperature).
• Exchangeability: Fully interchangeable.
• Long-Term Stability: Less than ±1%RH.

DHT22:

Description:

• The DHT22 is a calibrated digital signal output temperature and humidity combined sensor.
• It ensures high reliability and excellent long-term stability.
• No pull-up resistor is needed; just plug it directly into your board.
• Ultra-low power consumption.
• Completely interchangeable with other DHT22 sensors.

Specifications:

1. Size: 28.2mm (length) x 13.1mm (width) x 10mm (height).
2. Weight: 6g.
3. Working Voltage: 3V - 5.5V.
4. Signal Output Form: Digital signal.
5. Temperature Measurement Range: -40°C to 80°C.
6. Temperature Accuracy: 0.5°C.
7. Humidity Measuring Range: 0-100% RH.
8. Humidity Accuracy: 2% RH.
9. Resolution: 16 bits.
10. Convenient Installation: Equipped with fixed screw holes (diameter of 2.6mm).

Both the DHT11 and DHT22 sensors are valuable tools for measuring temperature and humidity in various applications. Choose the one that best suits your project requirements!