Cảm biến khí ga (MQ-7) --------------------------------------------------------- THÔNG SỐ KỸ THUẬTFEATURES * High sensitivity to carbon monoxide * Stable and long life APPLICATION They are used in gas detecting equipment for carbon monoxide(CO) in family and industry or car. SPECIFICATIONS A. Standard work condition Symbol Parameter name Technical condition Remark Vc circuit voltage 5V±0.1 Ac or Dc VH (H) Heating voltage (high) 5V±0.1 Ac or Dc VH (L) Heating voltage (low) 1.4V±0.1 Ac or Dc RL Load resistance Can adjust RH Heating resistance 33Ω±5% Room temperature TH (H) Heating time (high) 60±1 seconds TH (L) Heating time (low) 90±1 seconds PH Heating consumption About 350mW b. Environment conditions
Symbol Parameters Technical conditions Remark Tao Using temperature -20℃-50℃ Tas Storage temperature -20℃-50℃ Advice using scope RH Relative humidity Less than 95%RH O2 Oxygen concentration 21%(stand condition) the oxygen concentration can affect the sensitivity characteristic Minimum value is over 2% c. Sensitivity characteristic
symbol Parameters Technical parameters Remark Rs Surface resistance Of sensitive body
2-20k In 100ppm Carbon Monoxide а(300/100ppm) Concentration slope rate Less than 0.5 Rs (300ppm)/Rs(100ppm) Standard working Temperature -20℃±2℃ relative humidity 65%±5% RL:10KΩ±5% condition Vc:5V±0.1V VH:5V±0.1V VH:1.4V±0.1V Preheat time No less than 48 hours Detecting range: 20ppm-2000ppm carbon monoxide ---------------------------------------------------------- BỘ SẢN PHẨM BAO GỒM 1xCảm biến khí ga (MQ-7) ---------------------------------------------------------- THÔNG TIN BẢO HÀNH Không bảo hành ------------------------------------------------------------ THÔNG TIN LIÊN HỆ 🔴 Công ty cổ phần điện tử SMD 📬 Địa chỉ: số 84 ngõ 132 đường Cầu Diễn – Minh Khai – Bắc Từ Liêm – HN. ☎️ Điện thoại cửa hàng: 0246 687 4969 ☎️ Điện thoại bán hàng online: 0988 125 136 ☎️ Điện thoại bán hàng thương mại: 0869 256 946 ☎️ Điện thoại kỹ thuật: 02466537247 🔴 Zalo kỹ thuật: 0869256946 📧 Email: smdchip.vn@gmail.com 🌎 Website: http://linhkienviet.vn 🔴 Fanpage: https://www.facebook.com/smdchip.vn/ 🔴 Group hỗ trợ: https://www.facebook.com/groups/linhkiendientusmd