Catalogs >
Jinan Rainbow Technology Co.,Ltd >
CO gas sensor_S10003

CO gas sensor_S10003
7Pages

Catalog excerpts

MEMS CO Sensor S1003 Introduction S1003 carbon monoxide gas sensor is a MEMS miniature gas sensor developed based on metal oxide materials. It can be used to detect the carbon monoxide gas content in the air. The sensor has the characteristics of low power consumption, small size and low cost. Characteristic This product adopts MEMS technology, sturdy structure and high sensitivity to carbon monoxide; it has the advantages of small size, low power consumption, high sensitivity, fast response recovery, simple driving circuit, good stability, long life and so on. Main application Widely used in household carbon monoxide gas leak alarms, gas water heaters, automotive, industrial carbon monoxide gas alarms and portable carbon monoxide gas.

Open the catalog to page 1

Note: The measurement circuit for S1003 sensor is shown above. There are two different voltage in loop circuit, which were heating voltage (VH+) and test voltage (V_I/O). VH+ is used to provide a specific operating temperature for the sensor, which can be supplied by DC or AC power. V out is the voltage applied on the load resistance (RL), which is in series with the sensor. V_I/O is the loop voltage output through MCU I/0 port, which is intermittent or pulsed power supply with certain cycle (such as 2.5s/0.5s on-off for one cycle).

Open the catalog to page 3

Characteristic figures All tests are completed under standard test conditions. In the figure, R 0 represents the stable resistance value of the sensor in clean air, and Rs represents the stable resistance value of the sensor in a gas atmosphere with different concentrations. Sensor response recovery curve All tests are completed under standard test conditions. In the figure, Rs represents the realtime resistance value of the sensor, and the test gas is 50ppm CO gas.

Open the catalog to page 4

Effect of temperature and humidity on the sensor In the figure, Rs represents the stable resistance of the sensor in 100ppm CO gas under different temperature and humidity conditions, and Rs 0 represents the stable resistance of the sensor in 100ppm CO gas under 25 ℃ and 55% RH humidity conditions. Long-term stability of the sensor Note: All tests in the figure are completed under standard test conditions. Ro is the stable resistance of the sensor in clean air, Rs is the stable resistance of the sensor in a certain concentration of gas atmosphere, and the abscissa is the aging time of...

Open the catalog to page 5

The sensor must be kept away from all sources which may contain volatile silicon compounds, such as silicon adhesives, hair gels, silicone rubber, putty and so on. If silicon compound vapor is adsorbed on the surface of the sensor, the sensing material surface will be wrapped by silicon dioxide formed by the decomposition of the silicon compound, resulting in decreasing of the sensitivity, which is unrecoverable. ■ Exposure to high corrosive environments: The sensor will be damaged permanently if it is exposed to high-corrosive gas (such as H2S, SOX, Cl2, HCl etc.) at high concentration,...

Open the catalog to page 6

Long time exposure to extreme conditions, such as high humidity, high temperature or high pollution, will seriously affect the performance of the sensor, whether it is powered or not. ■ Shock or fall： The structure of the sensor may be damaged if it is subjected to strong vibrations and falls due to the broken of its lead. ■ Soldering conditions: Manual welding is the optimal soldering method for the sensor. 1. Scaling Powder：the recommended Scaling Powder are the Rosin Flux with the least amount of Chlorine； 2. Welding Temperature：≤250℃； 3. Welding Time: ≤3s； ■ SMT Conditions: Solder...

Open the catalog to page 7