Product Overview

The AGS0302 is an innovative odor sensor based on advanced MEMS principles, designed for precise monitoring of odor gas concentrations. It integrates a high-performance semiconductor silicon-based resistive sensing chip with unique dedicated digital module acquisition and gas sensing technologies, ensuring excellent performance and reliability. The sensor offers advantages such as low power consumption, high sensitivity, low cost, stable performance, and a simple drive circuit. It is rigorously calibrated and comprehensively tested before shipment to meet diverse customer needs and large-scale applications. The AGS0302 is widely used in refrigeration equipment and cold chain systems, including refrigerators, freezers, and fresh food display cabinets, by real-time monitoring and sensing changes in odor gas concentrations within the internal air to provide accurate and reliable data for a safer and more comfortable user experience.

Product Attributes

• Brand: ASAIR
• Manufacturer: Guangzhou Aosong Electronics Co., Ltd.
• Model: AGS0302
• Technology: MEMS
• Sensing Material: Metal oxide semiconductor
• Output Signal: Digital
• Calibration: Fully calibrated
• Warranty: 12 months

Technical Specifications

Specification	Value
Working Voltage	5.0V 0.5V DC
Working Current	35mA
Rated Power	170mW
Output Method	UART
Output Unit	Level
Output Value Range	099
Response Time	120s
Recovery Time	300s
Repeatability	20%
Working Temperature	-1050
Working Humidity	1098%RH
Dimensions (excluding cable)	37.4mm 20.4mm 9.1mm
UART Baud Rate	9600bps
UART Data Format	1 Start bit, 8 Data bits, No parity, 1 Stop bit
Pin Definitions	TXD (Blue), RXD (Yellow), +5V (Red), GND (Black)

Important Notes

• Avoid water contact or submersion, as it can degrade performance or cause damage.
• Prolonged exposure to high concentrations of VOCs (e.g., butane, hydrocarbons, hydrogen) can cause severe damage.
• High CO2 concentrations may have a slight impact.
• Avoid excessive airflow or direct drafts, which can lead to inaccurate measurements.
• Do not exceed the working voltage (5.5V max) and ensure correct polarity to prevent permanent damage.
• Avoid exposure to alkaline, acidic environments, halogen-containing substances, and volatile silicon compounds, as these can cause irreversible damage or reduced sensitivity.
• Long-term exposure to extreme conditions (high humidity, temperature, pollution) can severely affect performance.
• Frequent, excessive vibration or strong impacts may cause internal connection failures.
• Use high-quality shielded cables for signal transmission to ensure communication distance and quality.
• After initial power-up or prolonged disconnection, allow sufficient stabilization time (30-60 minutes) for accurate readings.
• Intermittent power supply may lead to inaccurate measurements; continuous power is required for continuous monitoring.

Safety Warning

This product is not intended for use in safety protection devices, emergency stop equipment, or any application where its failure could lead to personal injury, unless specifically authorized. Refer to the product datasheet and manual before installation, handling, use, or maintenance. Failure to comply may result in death or serious personal injury. Guangzhou Aosong Electronics Co., Ltd. disclaims all liability for such outcomes.
2504101957_Aosong-AGS0302_C45354803.pdf