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Description
MQ136:(Metal)Hydrogen Sulfide Sensor
MQ137:(Metal)Ammonia Gas Sensor
MQ138:(Metal)Formaldehyde Sensor
MQ139:(Metal) Freon Sensor
Features:
1.It Adopts a High-quality Dual-panel Design,Featuring Power Indication and TTL Signal Output Indication
2.It Has DO Switch Signal(TTL) Output and AO Analog Signal Output
3.TTL Output High And Low Levels.(Can Be Directly Connected to a Single-chip Microcomputer or Relay Module)
4.The Analog Output Voltage Varies with Concentration
5.There is One Screw Hole For Easy Positioning
6.It Has A Long Service Life And Reliable Stability
7.Rapid Response And Recovery Feature
Input Voltage:DC 5V
Power Consumption(Current):150mA
DO Output:TTL Digital Quantity 0 and 1(0.1 and 5V)
AO Output:Analog Level Signal
Special Reminder:After the Sensor is Powered On,It Needs to Be Preheated for About 20 Seconds for the Measured Data to Stabilize.It Is Normal for the Sensor to Heat Up.If It Gets Hot to the Touch,It is Abnormal.
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