Versatile Applications: Ideal for environmental industrial checks, and home air , providing reliability detection in labs, factories, and residential spaces Wide Detection Ranges : MQ131/136/137/138/139 sensors detect various including o₃ (10-1000ppm), hydrogen sulfide (1-200ppm), ammonia (5-500ppm), formaldehyde (5-500ppm), and (10-1000ppm) for comprehensive air High Sensitivity & Fast Response : Designed with advanced technology to quickly and accurately measure concentrations, ensuring timely detection of hazardous substances in environments durability ABS Construction:Built with ABS for long lasting and resistance to wear in demanding applications like industrial and indoor air Compact & Lightweight Design :Measures only 20.4x32.4mm, making it easy to integrate into environmental systems, industrial setups, and smart home devices, Manufacturer: Murye