SKU: SENS-3469
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AM2305 Digital Temperature and Humidity Sensor - Capacitive, Single-Wire Interface

₹1,589.00 (Inclusive of all taxes)
Out of Stock

The AM2305 is a calibrated digital temperature and humidity sensor combining a capacitive humidity element with a high-performance 8-bit microcontroller. It provides a single-wire serial interface for easy integration with Arduino, Raspberry Pi, ESP32, and other 5V logic systems.

Features

  • Calibrated digital output via single-wire serial interface
  • Wide measurement range: -40°C to 80°C and 0% to 99.9% RH
  • High accuracy: ±0.3°C for temperature, ±3% RH for humidity
  • Low power consumption with signal transmission up to 20 meters
  • Compact, shielded design for stable performance in demanding applications

Out of stock

Description

The AM2305 sensor integrates a capacitive humidity sensing element and a precision temperature measurement device, managed by an on-board 8-bit microcontroller. Each unit is factory-calibrated in a humidity chamber, with coefficients stored in OTP memory for accurate signal processing during operation.

Its single-wire serial interface simplifies wiring and communication, requiring only one data pin for bidirectional communication with a host microcontroller. The sensor’s shielded cable and robust construction ensure reliable performance in environments with electrical noise, making it suitable for professional monitoring and control systems.

Key Features

  • Factory-calibrated digital sensor with OTP memory storage
  • Single-wire serial interface for simplified system integration
  • Capacitive humidity sensing element for stable, long-term performance
  • Wide operating temperature range from -40°C to 80°C
  • Low power consumption suitable for battery-powered applications
  • Shielded 3-wire cable for enhanced noise immunity over distances up to 20m
  • Compact form factor for space-constrained installations
  • High-value build optimized for industrial and environmental monitoring

Applications

  • HVAC system environmental monitoring and control
  • Medical device climate control in ventilators and anesthesia machines
  • Industrial process monitoring in spray booths and automated systems
  • Precision agriculture and greenhouse climate management
  • Data logging for laboratory and experimental apparatus

Technical Specifications

Model / NameAM2305 Digital Temperature and Humidity Sensor
InterfaceDigital, Single-Wire Serial
Supply Voltage5V DC
Temperature Measuring Range-40°C to 80°C
Temperature Accuracy±0.3°C
Humidity Measuring Range0% to 99.9% RH
Humidity Accuracy±3% RH
Resolution0.1°C / 0.1% RH
Sensing TechnologyCapacitive (Humidity), Integrated (Temperature)
Output SignalDigital
Dimensions (L x W x H)150 mm x 80 mm x 40 mm
Weight0.01 kg

Frequently Asked Questions

What is the communication protocol for the AM2305 sensor?

The AM2305 uses a proprietary single-wire serial interface for bidirectional communication. It requires only one data pin connected to a host microcontroller (like an Arduino or Raspberry Pi GPIO), simplifying wiring. The protocol involves specific timing for initiating a measurement and reading the 40-bit digital data packet containing temperature and humidity values.

What is the operating voltage range for the AM2305?

The AM2305 sensor is designed for a 5V DC supply. It is crucial to provide a stable 5V power source to the VCC pin for accurate measurements and proper digital signal levels. The data line is also 5V logic compatible, so ensure your host microcontroller can handle 5V I/O or use a logic level converter if necessary.

How do I wire the AM2305 sensor's 3-pin connector?

The AM2305 typically has three pins: VCC (red wire, connect to 5V), DATA (yellow or white wire, connect to a digital I/O pin), and GND (black wire, connect to ground). A pull-up resistor (usually 4.7kΩ to 10kΩ) is often recommended on the DATA line to the VCC to ensure stable communication, though some modules include this resistor onboard.

What is the maximum cable length for reliable communication?

The sensor supports signal transmission distances up to 20 meters, as specified. For longer runs, use high-quality shielded cable to minimize noise interference on the single-wire data line. Ensure adequate power supply voltage at the sensor end to compensate for any voltage drop over the cable length.

Package Includes

  • 1 x AM2305 Temperature and Humidity Sensor

Additional Information

Weight 0.01 kg
Dimensions 15 × 8 × 4 cm