MQ137 Ammonia Sensor for Arduino

Marsoni

M251S

$990.00

Get it in 3 business days with 1 day shipping. Friday, May 29

MQ137 Ammonia Sensor for ArduinoOne size : 32mm X22mm X30mm L * 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 ( analog 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 , analog output increases with the concentration , the higher the

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We offer a 30-day return/exchange service after receiving.
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We bought these for the Florida beaches, not knowing whether our beach would have debris, shells, or the common straw sticking up to assault your feet! We bought them for our one year old and she loved them. The sole is thin and moveable, but still protected her feet. Our beach ended up being pristine and clean, so she didn’t really need them. We let her wear them at home in the grass because she was that obsessed with them. Nice product and we’d buy them again, if needed!

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Reviewed in the United States on January 9, 2023