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DHT11 Temperature & Humidity Sensor Specifications
General
- Sensor Type: Digital temperature & humidity sensor
- Output: Single-wire digital signal
- Calibration: Factory-calibrated
Electrical
- Operating Voltage: 3.3 V – 5 V
- Max Current: 2.5 mA during measurement
Temperature
- Range: 0°C to +50°C
- Accuracy: ±2°C
- Resolution: 1°C
- Sampling Rate: 1 reading per second (1 Hz)
Humidity
- Range: 20% – 90% RH
- Accuracy: ±5% RH
- Resolution: 1% RH
Physical
- Dimensions: ~23 × 12 × 5 mm
- Interface: Single data pin + VCC + GND
DHT22 (AM2302) Temperature & Humidity Sensor Specifications
General
- Sensor Type: High-accuracy digital temperature & humidity sensor
- Output: Single-wire digital signal
- Calibration: Factory-calibrated
Electrical
- Operating Voltage: 3.3 V – 6 V
- Max Current: 2.5 mA during measurement
Temperature
- Range: –40°C to +80°C
- Accuracy: ±0.5°C
- Resolution: 0.1°C
- Sampling Rate: ~0.5 Hz (1 reading every 2 seconds)
Humidity
- Range: 0% – 100% RH
- Accuracy: ±2% RH
- Resolution: 0.1% RH
Physical
- Dimensions: ~28 × 12 × 10 mm
- Interface: Single data pin + VCC + GND
Quick Comparison
| Feature |
DHT11 |
DHT22 |
| Temp Range |
0–50°C |
–40–80°C |
| Temp Accuracy |
±2°C |
±0.5°C |
| Humidity Range |
20–90% |
0–100% |
| Humidity Accuracy |
±5% |
±2% |
| Resolution |
1°C / 1% |
0.1°C / 0.1% |
| Cost |
Low |
Higher |
| Sampling Rate |
1 Hz |
0.5 Hz |
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