MQ-139 MQ139 Freon Gas Sensor Probe, Gas Sensor Module,Freon Gas Detection Module High sensitivity
Product Description:
1: Wide range of applications
2: With signal output indicator light
3: With mounting holes for easy fixed installation
4: High sensitivity
5: Long service life
Parameter:
1. Dimensions: 35mm X21mm X28mm length X width X height
2. Working voltage: DC 5V
Features:
1. With signal output indicator light;
2. Dual signal output (analog output and TTL level output);
3. The TTL output valid signal is low level; (the signal light is on when the output low level, can be connected to the IO port of the microcontroller)
4. The analog output increases with the concentration, the higher the concentration, the higher the voltage;
High sensitivity to ozone gas (detection concentration range 10-1000ppm)
6. It has a long service life and reliable stability;
7. Quick response and recovery features;
8. With mounting holes, it is convenient for fixed installation;
9. The probe can be plugged and unplugged, which is convenient for testing.
Packing list:
1*MQ139 Freon gas sensor
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
