Semiconductor CO Sensor - MQ-K7

Product Specification

Semiconductor CO Sensor MQ-K7

Specification:

Sensitive material of MQK7 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 cleans the other gases 

adsorbed under low temperature. Please use simple electroniccircuit, Convert change of conductivity to correspond 

output signal of gas concentration.MQ-K7 gas sensor has high sensitivity to Carbon Monoxide. 

The sensor could be used to detect different gases contains CO, it is with low cost and suitable for different application.

Character:

1.      High sensitivity for carbon monoxide

2.     Excellent stability

3.     Long Life

4.     Large electrical output

5.     Excellent selectivity

Application:

1. Domestic gas leakage detector

2. Industrial CO detector

3. Portable gas detector

Technical Parameter:

Gas: Carbon Monoxide
Detection range: 10 to 1000ppm
Characteristic gas: 100ppm Carbon Monoxide
Sensitivity: R in air / R in typical gas ≥ 5
Load Resistance: 10～50KΩ adjustable
Response time: ≤ 30s
Recovery time: ≤ 60s
Heating current: ≤ 50mA
Heating voltage: 1.5V
Measuring voltage: 5V
Operating Conditions Ambient temperature: -20～+55℃
                        Humidity: ≤ 95% RH
                        Environmental oxygen content: 21%
Storage conditions Temperature: -20～+70℃ 

                          Humidity: ≤ 70% RH