4 – in – 1 Portable Multi – Gas Detector with LCD and Rechargeable Battery – GAOTek

Description Overview This 4-in-1 Multi-Gas Detector is a portable and reliable safety device designed to continuously monitor Oxygen (O₂), Combustible Gas (LEL), Carbon Monoxide (CO), and Hydrogen Sulfide (H₂S). Equipped with a clear LCD, it shows real-time concentration levels for all four gases simultaneously. The detector features user-configurable high and low alarms, along with STEL and TWA alarm functions, ensuring comprehensive safety monitoring. With both audio and visual alerts, it provides instant warnings when gas levels exceed safe limits. Compact, rechargeable, and durable, this detector is ideal for industrial, commercial, and confined space applications.   Features  Detects 4 types of gases: Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Oxygen (O₂), and Combustible Gas (LEL).  Made with premium materials and top-quality electronic components for high sensitivity and accurate measurement.  Compact, lightweight, and ergonomic design for convenient carrying and use.  Built-in 2500mAh lithium-ion battery supports up to 8 hours of continuous operation (about 6 hours with an external gas sampling pump).  Backlit display ensures clear visibility even in dark environments.  Dual alarm modes: audio alerts and on-screen icons.  Multiple functions, including gas monitoring, peak value display, low alarm setting, high alarm setting, and TWA alarm mode.  Ideal for use in petroleum, chemical, metallurgy, refining, and other industrial environments.    Technical Specifications Type  Multi-Gas Meter  Color  Yellow  Material / Housing  ABS, rugged and impact-resistant  Detected Gases & Ranges  – Carbon Monoxide (CO): 0–999 ppm – Hydrogen Sulfide (H₂S): 0–500 ppm – Oxygen (O₂): 0–30% VOL – Combustible Gas (LEL): 0–100%  Detection Principle  Electrochemical (CO, H₂S, O₂), Catalytic combustion / Semiconductor (Combustible Gas)  Resolution  CO: 1 ppm H₂S: 1 ppm O₂: 0.1% VOL Combustible Gas: 1% LEL  Accuracy / Precision  ±2–3% FS  Response Time (T90)  ≤ 15 seconds  Recovery Time  ≤ 60 seconds  Sensor  High-precision imported multi-gas sensors  Sensor Lifetime  2–3 years typical (depending on usage)  Operation Current  220 mA  Short Circuit Current  ≤ 3 A  Operation Voltage  3.7 V  Maximum Open Circuit Voltage  ≤ 4.2 V  Battery Type  Rechargeable Lithium Battery  Battery Capacity  2500 mAh  Battery Life  15–20 hours continuous operation  Charging Time  4–6 hours  Display Type  Segment-type LCD with backlight  Alarm Modes  Audible (≥90 dB), Visual (LED), Vibration  Alarm Thresholds  Configurable per gas  Operating Temperature  50°F to 122°F (10°C to 50°C)  Storage Temperature  32°F to 104°F (0°C to 40°C)  Operating Humidity  15% ~ 95% RH (non-condensing)  Ingress Protection  IP65 dust and water-resistant  Dimensions  135 × 70 × 35 mm (approx.)  Weight  ~250 g  Data Logging  Optional, up to 30 days of readings  Communication / Interface  Optional USB / Bluetooth for PC or mobile integration  Usage Scenarios  Industrial safety, oil & gas, chemical plants, mining, confined spaces, laboratories  Optional Features  Multi-gas monitoring, real-time mobile app integration, alarm history, automatic calibration