SMART SENSOR 4 In 1 Oxygen/Hydrogen Sulfide/Carbon Monoxide Gas Detector(AR8900 English)

1. Carbon monoxide: 0-999 ppm 2. Hydrogen sulfide: 0-500 ppm 3. Oxygen: 0-30%VOL 4. Combustible gas: 0~100%LEL 5. Protection rating: IP65 6. Battery: built-in 3.7V 3500mAh Lithium Battery 7. Alarm settings: upper and lower limit alarm values/STEL alarm value/TWA alarm value 8. Zeroing and calibration: supported 9. Sensor principle: electrochemical, catalytic combustion 10. Power-on response time: 60 seconds 11. Operating current: 360 mA 12. Display: 2.4-inch LCD backlit segment display 13. Charging interface: TYPE-C charging interface 14. Alarm method: triple alarm prompt (audio, visual, vibration) working time: 12 hours (with built-in pump operating, no alarm) 15. Automatic Shutdown: Automatically shuts down after 10 minutes of inactivity. 16. Excellent sensitivity and accuracy, short response time, precise and professional measurement. 17. Built-in high-speed suction pump for faster and more complete gas absorption. 18. Triple alarm with sound, light, and vibration: The instrument will provide a triple alarm indication with a buzzer, flashing light, and vibration. 19. Supports charging function; can work for 12 hours without alarms. 20. High-definition backlit large screen with adjustable brightness; clear reading even in dark environments, making measurement more convenient and faster. 21. Sleep mode saves energy; the instrument will automatically shut down after 10 minutes of inactivity. 22. Metal back clip design for easy carrying. 23. Anti-slip design to prevent slippage and damage. 24. Weight: 304g 25. Dimensions: 82x68x167mm 26. Sampling tube length: 282mm