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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My 100 lb shephard/golden mix likes this toy but she tends to get agitated with it. I have to keep an eye on her because she destroys toys in record time. The only complaint I really have is once she gets interested and plays for a long time it needs to be charged and she doesn't want me to take it to be charged. Wish the charge lasted a little longer or there were two of the inner parts so one could charge while she is playing with the second one. The plastic ball could be made of rubber so the teeth marks don't show up.

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Reviewed in the United States on March 27, 2026

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Gary Miller

Draper, US

★★★★★ 5

Nice toy for driving your puppy crazy

Size: Small

Rubber ball that squeaks. Works fine

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Reviewed in the United States on May 19, 2026

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Kayla_B

Massapequa, US

★★★★★ 5

Perfect for little dogs.

Size: Small

Our dog is OBSESSED with these little balls. Perfect fit for him at a great price. He likes to chew on them and so far they have held up great and don’t show signs of wear.

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Reviewed in the United States on April 5, 2026

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mary rieben

Battle Creek, US

★★★★★ 5

Squeaky rubber bouncing balls for smaller dogs

Size: Small

Great for smaller dogs, mine loves playing with them in the pool. Excellent quality for the price and definitely would recommend!

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Reviewed in the United States on May 28, 2026

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