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This 4 in 1 gas detector is designed to detect Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Oxygen (O₂), and Combustible Gas (LEL). It continuously monitors the gas concentration in the surrounding environment. Once the gas concentration reaches the alarm level, it will trigger sound, vibration, and flash alarms.

Features:
High precision: Ensures accurate measurement of gas concentrations.
Portable: Compact size (140 * 75 * 35mm) and light weight (270g), making it easy to carry and operate.
Triple alarms: Sound, vibration, and flash alarms provide clear alerts.
Adjustable alarms: Upper and lower limit alarm values, TWA (Time – weighted value measured within 8 hours), and STEL (Short term exposure limit) alarm values can be set.
Wide measurement range: CO: 0～999ppm, H₂S: 0～500ppm, O₂: 0～30%VOL, LEL: 0～100%LEL.
High resolution: CO: 1ppm, H₂S: 1ppm, O₂: 0.1%VOL, LEL: 1%LEL.
Suitable environment: Can operate in humidity from 15% – 95%RH and temperature from – 10℃ to 50℃, and be stored at 0 – 40℃.

Specification:
Material: ABS
Screen Size: 47 * 38mm / 1.9 * 1.5in
Sensor: Electrochemical Principle
Charging Port: Micro USB DC 5V
Sampling Pump Power Supply: DC 3V power supply
Operation t: 230mA
Short Circuit t: ≤3A
Operation Voltage: 3.7V
Maximum Open Circuit Voltage: ≤4.2V
Battery Type: BL – 9C
Display Type: Segment type LCD
Operation Humidity: 15% – 95%RH
Operation Temperature: – 10℃ – 50℃
Storage Temperature: 0 – 40℃
Battery Working Runtime: 6 hours (no alarm)
Measurement Range: CO: 0～999ppm, H₂S: 0～500ppm, O₂: 0～30%VOL, LEL: 0～100%LEL
Resolution: CO: 1ppm, H₂S: 1ppm, O₂: 0.1%VOL, LEL: 1%LEL
Alarm Alert: Sound/vibration/flash triple alarms
Item Size: 140 * 75 * 35mm / 5.51 * 2.95 * 1.37in
Item Weight: 270g / 9.52oz
Package Weight: 430g / 15.17oz
Package Size: 24.5 * 9 * 6cm / 9.64 * 3.54 * 2.36in

Package List:
1 * 4 in 1 Gas Detector
1 * USB Cable
2 * Screws
1 * Gas Calibration Hood
1 * Storage Bag
1 * User Manual (English)

Please Notes:
1. The real performance of the detector may be slightly affected by the actual environment conditions such as temperature and humidity within the specified range.
2. Please allow slight manual measurement deviation for the data.