{"product_id":"mq-135-air-quality-vocs-sensor-module-5v-ao-do-output-2-pcs","title":"MQ-135 Air Quality, VOCs Sensor Module, 5V AO + DO Output (2 Pcs)","description":"\u003ch3\u003eAbout this item\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMQ-135 module for air quality, vocs: SnO2 sensing element heated inside a metal mesh cap\u003c\/li\u003e\n\u003cli\u003eAnalog output AO rises with gas concentration; digital output DO switches at a level you set\u003c\/li\u003e\n\u003cli\u003e5V DC supply, 4-pin 2.54 mm header (VCC \/ GND \/ DO \/ AO), power and signal LEDs\u003c\/li\u003e\n\u003cli\u003eOnboard LM393 comparator and threshold potentiometer, so DO can drive a buzzer or LED with no extra code\u003c\/li\u003e\n\u003cli\u003eTwo modules per pack; needs warm-up and your own calibration - a prototyping module, not a certified detector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MERICDA","offers":[{"title":"Default Title","offer_id":67546745274616,"sku":"B0FN43Y3T7","price":15.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/4466\/6616\/files\/31hK9nYK5sL._AC_SL1500.jpg?v=1791270386","url":"https:\/\/onebuildsupply.com\/products\/mq-135-air-quality-vocs-sensor-module-5v-ao-do-output-2-pcs","provider":" PipePulse","version":"1.0","type":"link"}