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MQ-4 - Semiconductor Sensor
Henan Hanwei Electronics Co., Ltd www.hwsensor.com MQ-4 Semiconductor Sensor for Natural Gas Sensitive material of MQ-4 gas sensor is SnO2, which w.MQ-9 - Semiconductor Sensor
Henan Hanwei Electronics Co., Ltd www.hwsensor.com MQ-9 Semiconductor Sensor for CO/Combustible Gas Sensitive material of MQ-9 gas sensor is SnO2, .