SMART SENSOR 4 In 1 Gas Concentration Explosion-Proof Detector 1. Carbon monoxide: 0-1000 ppm 2. Hydrogen sulfide: 0~500 ppm 3. Oxygen: 0-30%VOL 4. Combustible gas: 0~100%LEL 5. Alarm settings: upper and lower limit alarm valuesSTEL alarm valuesTWA alarm values 6. Zeroing and calibration: supported 7. Time display: date and time 8. Language display: Chinese and English 9. Operating current: 360 mA 10. Sensor principle: Electrochemical, catalytic combustion 11. Display: 2.4-inch dot matrix color display 12. Protection rating: IP65 13. Battery: built-in 3.7V 3500mA lithium battery 14. Data storagecomputer connection: 150,000 records, supports computer analysis 15. The instrument provides triple alarm prompts: beep, flash, and vibration. 16. Supports lithium battery charging; can operate for 16 hours without alarms. 17. Connects to a computer via Type-C data cable for real-time measurement data viewing, communication, printing, importing records, and exporting to Excel. 18. Supports brightness adjustment for clear reading even in dark environments, making measurements more convenient and faster. 19. Sleep mode for energy saving; automatically shuts off after 10 minutes of inactivity. 20. Metal back clip design for easy carrying and secure attachment. 21. Type-C charging interface; built-in rechargeable lithium battery. 22. Anti-slip design to prevent slipping and damage. 23. Detects carbon monoxide, hydrogen sulfide, oxygen, and combustible gases with excellent sensitivity and accuracy, short response time, and professional measurement precision. 24. Built-in high-speed suction pump for faster and more complete gas absorption. 25. Dimensions: 82x68x149mm 26. Weight: 255g