| is_customized | Yes |
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| Type | Humidity Sensor |
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| Material | Polymer |
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| Usage | Temperature Sensor |
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| Theory | Capacitance Sensor |
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| Output | - Sensor |
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| Model Number | sensor |
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Ammonia detection sensor MQ137 NH3 gas sensor module large price advantages
Our shipping with the pass , rhyme delivery , in the pass , rhyme remote areas unreachable . Not shipping in the column.
One size : 32mm X22mm X30mmL * W * H
Second, the main chip : LM393, NH3 gas sensing probe
Third, the working voltage : DC 5V
Four characteristics:
1, with the signal output LED indicates ;
2 , dual signal output ( - output , and TTL level output ) ;
3, TTL output valid signal is low ; ( lights lit when the output is low, which can be accessed microcontroller IO port )
4 , - output increases with the concentration , the higher the concentration the higher the voltage ;
5 of ammonia with high sensitivity and selectivity ;
6, with a long life and reliable stability ;
7 , rapid response and recovery characteristics ;
8 , with mounting holes for easy fixed installation ;
9 , the probe can plug design for easy testing .
V. Application :
For household hazardous gas detection device environment , suitable for detection of ammonia vapor , ammonia gas sensors tested concentration range : 10 to 300ppm



