Usage Tips: - Features a high-quality double-panel design with power indicator and TTL signal output indicator. - Provides DO switch signal (TTL) output and AO analog signal output. - TTL output supports standard high/low logic levels (0.1V and 5V), compatible with microcontrollers and relay modules. - Analog output voltage varies proportionally with gas concentration. Fast response and recovery time. - Designed for long service life and reliable stability. Electrical Specifications: - Input Voltage: DC 5V - Power Consumption: 150mA - DO Output: TTL digital signal (0 and 1) - AO Output: Analog voltage signal Note: After powering on, the sensor requires approximately 20 seconds of preheating before readings stabilize. Slight heating during operation is normal due to the internal heating element. Wiring Instructions: 1. VCC: Connect to positive terminal of 5V power supply 2. GND: Connect to negative terminal of power supply 3. DO: TTL digital output 4. AO: Analog output Material: Metal Color: Green Package Includes: - 1 x MQ131 High Concentration Ozone Sensor Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.