Semiconductor Carbon Monoxide Sensor CO Sensor - MQ-K9

Product Specification

Semiconductor Carbon Monoxide Sensor CO Sensor MQ-K9

Specification:

Sensitive material of MQ-K9 gas sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO when low temperature (heated by 1.5V). The sensor’s conductivity is higher along with the gas concentration rising. When high temperature (heated by 5.0V), it detects Methane, Propane etc combustible gas and cleans the other gases adsorbed under low temperature. Please use simple electronic circuit, Convert change of conductivity to correspond output signal of gas concentration.

MQ-K9 gas sensor has high sensitivity to Carbon Monoxide, Methane and LPG. The sensor could be used to detect different gases contains CO and combustible gases，it is with low cost and suitable for different application.

Character:

1. Good sensitivity to CO/Combustible gas

2. High sensitivity to Methane, Propane and CO

3. Long life and low cost

4. Simple drive circuit

Application:

1. Domestic gas leakage detector

2. Industrial gas detector

3. Portable gas detector

Technical Parameter:

Gas: Carbon Monoxide and Combustible Gas
Detection range: CO: 10 to 1000ppm

Combustible Gas: 100 to 10000
Sensitivity: R in air / R in typical gas ≥ 5
Load Resistance: 5～50KΩ adjustable
Response time: ≤ 30s
Recovery time: ≤ 60s
Heating current: CO:<=60mA  CH4: <=150mA
Heating voltage: CO:1.5V  CH4:5V
Measuring voltage: 5V
Operating Conditions Ambient temperature: -20～+55℃
                         Humidity: ≤ 95% RH
                         Environmental oxygen content: 21%
Storage conditions Temperature: -20～+70℃ 

                           Humidity: ≤ 70% RH