AM2305 is a digital temperature and humidity sensor produced by Aosong Electronics. It uses a dedicated digital module acquisition technology and temperature and humidity sensing technology, and has excellent reliability and excellent long-term stability. The product has excellent quality, ultra-fast response, strong anti-interference ability, and high cost performance.
The AM2305 is a calibrated digital temperature and humidity sensor that combines a capacitive humidity element with a DS18B20 temperature chip and an 8‑bit MCU. It offers high reliability, low power consumption, and a signal transmission distance of over 20 m, making it suitable for a wide range of applications such as HVAC, weather stations, and data loggers.
The manual details installation options (wall, bracket, flange), power requirements (3.3‑6 V), single‑bus communication protocol, electrical characteristics, and recommended wiring practices. It also covers operating and storage conditions, recovery procedures after exposure to harsh environments, and troubleshooting guidance. This manual is written in Chinese.
| Humidity resolution | 0.1 %RH |
|---|---|
| Humidity repeatability | +0.3 %RH |
| Humidity accuracy | ±2 %RH |
| Temperature resolution | 0.1 °C |
| Temperature repeatability | +0.2 °C |
| Temperature accuracy | ±0.2 °C |
| Temperature range | -40 °C to 125 °C |
| Supply voltage | 3.3 V – 6 V |
| Supply current (typical) | 1.5 mA |
| Standby current | 40–50 µA |
| Sampling period | ≥2 s |
The sensor operates from 3.3 V to 6 V.
The sampling period should not be lower than 2 seconds; shorter intervals may cause errors.
For lines longer than 20 m, use an appropriate pull‑up resistor as per the actual conditions.