Asair AM2301 Capacitive Digital Temperature & Humidity Sensor - Digital 1-Wire Output

Name: Asair AM2301 Capacitive Digital Temperature &amp; Humidity Sensor - Digital 1-Wire Output
Brand: Asair
SKU: SENS-3480
Price: 359.00 INR
Availability: OutOfStock

₹359.00 (Inclusive of all taxes)

Out of Stock

The Asair AM2301 is a calibrated digital temperature and humidity sensor module with a 1-Wire digital output, compatible with 3.3V and 5V logic systems like Arduino, Raspberry Pi, ESP32, and other microcontrollers for environmental monitoring.

Features

Digital 1-Wire output simplifies interfacing with a single microcontroller pin.
High accuracy temperature sensing (±0.5°C) and humidity measurement (±3% RH).
Wide operating range from -40°C to +80°C and 0% to 99.9% RH.
Low power consumption with an average current draw of 300 µA.
Pre-calibrated, interchangeable unit with excellent long-term stability.

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Description

The Asair AM2301 is a capacitive digital sensor integrating a calibrated capacitive humidity sensor and a thermistor for precise environmental measurements. It outputs fully digital signals via a proprietary 1-Wire serial interface, requiring only a single data line for communication, which reduces wiring complexity and I/O pin usage on host controllers.

Designed for reliable performance, the sensor features a robust 4-pin package with a built-in signal conditioning circuit, ensuring stable readings over long cable runs. Its wide operating voltage range of 3.3V to 5.5V DC makes it directly compatible with most 3.3V and 5V logic families found in development platforms and industrial data acquisition systems.

Key Features

Integrated capacitive humidity sensing and thermistor-based temperature measurement.
Single-bus digital output protocol simplifies system integration.
Factory calibrated for immediate use with no additional components required.
Excellent long-term stability and measurement consistency.
Ultra-low power consumption for battery-powered applications.
Fully interchangeable units ensure consistent performance across deployments.
Compact form factor with a 20cm cable for flexible mounting.

Applications

HVAC system climate control and energy management.
Indoor air quality monitoring and smart home automation.
Weather station data logging and environmental research.
Precision agriculture and greenhouse monitoring systems.
Server room and data center environmental condition monitoring.

Technical Specifications

Model Number	AM2301
Supply Voltage	3.3V to 5.5V DC
Output Type	Digital (1-Wire)
Temperature Range	-40°C to +80°C
Temperature Accuracy	±0.5°C
Humidity Range	0% to 99.9% RH
Humidity Accuracy	±3% RH
Average Current	300 µA
Cable Length	20 cm
Dimensions (L x W)	60 mm x 27 mm
Weight	15 g

Frequently Asked Questions

What is the communication protocol for the AM2301 sensor?

The AM2301 uses a proprietary single-bus digital protocol, often referred to as 1-Wire. It requires only one digital data pin on your microcontroller for bidirectional communication, alongside power and ground connections. Libraries like DHTlib are available for Arduino and other platforms to handle the timing-critical protocol.

What is the operating voltage range, and can I use it with 3.3V systems like ESP32?

Yes, the AM2301 operates from 3.3V to 5.5V DC, making it fully compatible with 3.3V logic devices like the ESP32, Raspberry Pi, and STM32, as well as traditional 5V Arduino boards. Ensure your data line logic levels match the sensor's supply voltage for reliable communication.

How accurate is the AM2301, and does it require calibration?

The sensor is factory calibrated, providing an accuracy of ±0.5°C for temperature and ±3% RH for humidity under typical conditions. It is designed for immediate use without user calibration. For maximum accuracy, avoid condensing environments and ensure adequate airflow around the sensor.

What is the maximum recommended cable length for reliable data transmission?

The included cable is 20cm. For longer distances, it is recommended to use shielded cable and keep runs under 1 meter to maintain signal integrity for the 1-Wire protocol. For industrial applications requiring longer runs, consider using a signal conditioner or an RS485 transmitter module.