Carbon Monoxide Sensor, 10–500 ppm CO

Cat No: SGS-LJX-0010 Datasheet

Product Name: Carbon Monoxide Sensor, 10–500 ppm CO

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Basic Information

Detailed Description	The carbon monoxide gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. It employs a high-low temperature cycling detection method: low-temperature (1.5V heating) detection of carbon monoxide shows that the sensor's conductivity increases with increasing carbon monoxide concentration in the air; high-temperature (5.0V heating) cleaning removes stray gases adsorbed during the low-temperature process. A simple circuit converts the change in conductivity into an output signal corresponding to the gas concentration. The MQ-7B carbon monoxide gas sensor has high sensitivity to carbon monoxide and can detect various carbon monoxide-containing gases, making it a low-cost sensor suitable for a wide range of applications.
Main Applications	Household gas leak alarms, industrial carbon monoxide gas alarms, portable gas detectors.
Product Type	Semiconductor gas sensor
Standard Package	Plastic sealing
Detecting Gas	Carbon monoxide
Detection Concentration	10–500 ppm CO
Circuit Voltage	5.0V±0.1V DC
Heating Voltage	5.0V±0.1V AC or DC (High Temperature) 1.5V±0.1V AC or DC (Low Temperature)
Heating Time	60s±1s (high temperature), 90s±1s (low temperature)
Load Resistor	Adjustable
Heating Resistor	30Ω±3Ω (room temperature)
Heating Power Consumption	≤950mW
Sensitivity	Rs(in air)/Rs(in 150ppm CO)≥5
Output Voltage	2.5V～4.3V (in 150ppm CO)
Concentration Slope	≤0.6 (R300ppm/R50ppm CO)
Standard Test Temperature and Humidity	20℃±2℃; 55%±5%RH
Standard Test Circuit	Vc: 5.0V±0.1V VH (High Temperature): 5.0V±0.1V; VH ( Low Temperature): 1.5V±0.1V
Standard Test Preheating Time	No less than 48 hours
Oxygen Content	21% (not less than 18%, (Oxygen concentration will affect the sensor's initial value, sensitivity and repeatability. Please consult when using it in low oxygen concentration conditions )
Life	10 years

Features

It exhibits good sensitivity to carbon monoxide over a wide concentration range.
Long lifespan, low cost
Simple drive circuit

Note

Note	Output voltage (Vs) refers to the voltage in the test atmosphere.

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