Electronics Parts 
Electrical & Industrial 
Lab Equipment's 
Power Supply 
Gadgets & Gear 
Miscellaneous 
Services 
Recycle Bin 
MQ-138 Formaldehyde HCHO & VOC Gas Sensor Module with Alarm Signal Light
Product Code: SNM012Category: Sensor Modules
MQ-138 Formaldehyde HCHO & VOC Gas Sensor Module with Alarm Signal Light
MQ138 MQ-138 Formaldehyde HCHO & VOC Gas Sensor Module with Alarm Signal Light.
The MQ-138 is a metal oxide semiconductor gas sensor designed primarily for detecting Formaldehyde (HCHO) and Volatile Organic Compounds (VOCs) in the air.
Technical Specifications
· Detection Range: 5 to 500 ppm (parts per million) for most target vapors.
· Target Gases: Formaldehyde (HCHO), toluene, acetone, alcohol, methanol, benzene, and hydrogen.
· Operating Voltage: 5.0V ± 0.1V DC for the built-in heater coil.
· Preheat Time: Over 48 hours for stable calibration and accurate readings.
· Output Signals: Dual-signal capable, providing both an Analog Output (AO) for varying gas intensity and a Digital Output (DO) for simple threshold alerts.
· Primary Applications
· Indoor Air Quality (IAQ): Used in domestic smart home systems to track harmful emissions from paints, furniture, and building materials.
· Industrial Safety: Integrated into industrial leak alarms to detect dangerous accumulations of organic solvents.
· Breath Analysis: Utilized in electronic nose (E-nose) research arrays to detect organic biomarkers in breath samples.
MQ138 MQ-138 Formaldehyde HCHO & VOC Gas Sensor Module with Alarm Signal Light.
The MQ-138 is a metal oxide semiconductor gas sensor designed primarily for detecting Formaldehyde (HCHO) and Volatile Organic Compounds (VOCs) in the air.
Technical Specifications
· Detection Range: 5 to 500 ppm (parts per million) for most target vapors.
· Target Gases: Formaldehyde (HCHO), toluene, acetone, alcohol, methanol, benzene, and hydrogen.
· Operating Voltage: 5.0V ± 0.1V DC for the built-in heater coil.
· Preheat Time: Over 48 hours for stable calibration and accurate readings.
· Output Signals: Dual-signal capable, providing both an Analog Output (AO) for varying gas intensity and a Digital Output (DO) for simple threshold alerts.
· Primary Applications
· Indoor Air Quality (IAQ): Used in domestic smart home systems to track harmful emissions from paints, furniture, and building materials.
· Industrial Safety: Integrated into industrial leak alarms to detect dangerous accumulations of organic solvents.
· Breath Analysis: Utilized in electronic nose (E-nose) research arrays to detect organic biomarkers in breath samples.
Watch this video it will give you a clear idea about this product.
Related Product
