Bán Cảm biến khói MQ-4 cảm biến khí metan cảm biến khí mniên 4 cảm biến khí khói giá tốt nhất

Welcome to our shop 👑Kingzizi👑, all the products in this shop are at a favorable price💕, and have quality assurance💕, you can rest assured to buy💕, we will give you the best and highest quality shopping experience! 🌹🌹🌹 MQ-4 Smoke sensor methane sensors gas sensors MQ4 Smoke gas Detector sensor MQ-4 sensor The gas sensing material used in the MQ-4 gas sensor is two tin oxide (SnO2), which has a lower conductivity in clean air. The electrical conductivity of the sensor increases with the increase of the concentration of combustible gas in the air when the sensor is in the presence of combustible gas. A simple circuit is used to convert the change of electrical conductivity to the output signal corresponding to the gas concentration. The sensitivity of MQ-4 gas sensor to methane is high, and it has a better sensitivity for propane and. This sensor can detect a variety of combustible gases, especially natural gas, is a suitable for a wide range of applications of low-cost sensors. characteristic * good sensitivity to combustible gas in a wide range of concentration. * the sensitivity of methane is higher. * long life, low cost * simple drive circuit application * household gas leak alarm * Combustible gas alarm for industrial use * portable gas detector Applicable gas：Natural gas, methane Detection range：300 to 10,000 ppm Characteristic gas：5000ppm methane Sensitivity：R in air / R in typical gas5 Sensitive body resistance：1K ~ 20K in 5000ppm methane Response time：10s Recovery Time：30s Heating resistance：31 ± 3 Heating current：180mA Heating voltage：5.0V ± 0.2V heating power：900mW Measure the voltage：24V Working conditions Ambient temperature: -20 ~ + 55 Humidity: 95% RH Environmental oxygen content: 21% Storage conditions Temperature: -20 ~ +70 Humidity: 70% RH Before purchase: 1.All the goods are ready stock, we will arrange the shipment at once if we receive the order. 2.Please read the item description, if you have any question, do not hesitate to contact us. 3.Use the vouchers for more saving. Shipment： 1.1-2 days to ship(except for the pro-order item) 2.If you have not received the item after 15 days shipment,Please contact us. After purchase: 1.If you are satisfied，please give us 5 stars praise. 2.Please contact us before you are going to give us bad review. We are helpful and will solve the problems. if you receive a defect item,please contact us at once with item picture or vide #MQ-4 #Smoke #sensor #methane #sensors #gas #sensors #MQ4 #Smoke #gas #Detector #sensor