Mq8

MQ‑8 Gas Sensor: High‑Precision Hydrocarbon Detection for Safety and Automation

The MQ‑8 is a highly responsive metal‑oxide semiconductor sensor optimized for detecting hydrocarbon gases such as LPG, methane, and natural gas. It operates at a low supply voltage (3–5 VDC) and delivers a variable resistance output that can be read directly by microcontrollers or amplified through a simple transimpedance stage. Its internal heater maintains a stable operating temperature of 200 °C, ensuring consistent sensitivity over long periods. The sensor’s fast response (<180 s for 90 % of steady‑state) and low power consumption (≈150 mA) make it ideal for battery‑powered safety systems, smart home appliances, and industrial process control.

• Operating Voltage: 3–5 VDC (±10 %)
• Detection Range: 1–1000 ppm for LPG/CH₄ (linearity 0.1–10 ppm, 10 % tolerance)
• Response Time: < 180 s (to 90 % of steady‑state at 200 °C)
• Common Use Case: Real‑time gas‑leak monitoring in residential kitchens, industrial safety systems, and automotive onboard diagnostics.