1. Detected gas: sulfur dioxide 2. Measurement range: 0~20ppm 3. Resolution: 1ppm 4. Sensor: electrochemical sensor, two-year lifespan 5. Low/high concentration alarm: yes 6. Alarm value setting: yes 7. Alarm indication: audible, visual, and vibration triple alarm, alarm values ??can be set 8. Power supply: 3.7V Lithium Battery 9. High-precision sensor, sensitive response, accurate measurement, with good stability and repeatability, capable of timely detection and alarm, ensuring no danger is missed. 10. Adopts a high-decibel buzzer alarm, light, and vibration triple alarm system. Alarm values ??can be set, and the sound can reach 80 decibels. 11. Rechargeable 3.7V lithium battery, long service life, safe and durable, long battery life, approximately 9 hours of use on a single charge. 12. Compact and portable size, suitable for measurement in various complex environments and locations, convenient and practical. 13. Weight: 200g 14. Dimensions: 120x64x38mm
