Feature: 1. 4 in 1 DESIGN: Oxygen, carbon monoxide, hydrogen sulfide and combustible gas can be detected. The detector adopts professional electrochemical sensor, with premium sensitivity and good repeatability. 2. MULTI ALARMS REAL TIME FEEDBACK: When the gas concentration exceeds the alarm value, the sound, light and vibration alarms equipped on the instrument will give an alarm together. 3. HD COLOR DISPLAY: 2.3in HD color display, multi interface display, all data are clear at a glance, and the main menu has six icon options, single measurement, multiple measurements, view records, alarm settings, system settings, and calibration. 4. DATA STORAGE: 120000 large capacity data storage. The review function displays the waveform to facilitate data viewing. 5. WIDE APPLICATION: The detector is widely used for petroleum, chemical industry, environmental protection, metallurgy, oil refining, gas transmission and distribution, biochemical medicine, agricultural scientific research, etc. Specification: Item Type: Combustible Gas Detector Material: ABS Plug: US Standard AC100-240V Color Screen Upgrade: 2.3 inch HD color screen, multi interface display, all data at a glance Gas Detection and Measuring Range: Combustible Gas: 0 to 100% LEL Oxygen: 0 to 30% VOL Hydrogen Sulfide: 0 to 100 μ mol/mol Carbon Monoxide: 0 to 1000 μ mol/mol Resolution: 0.1 (combustible gas, hydrogen sulfide, oxygen), 1 (carbon monoxide) Measurement Accuracy: ≤± 5% FS Response Time (90%): 30S Storage Environment: Temperature: - 10 to 55 ℃ Humidity: Less than 85% RH Working Environment: Temperature: - 20 to 50 ℃ Humidity: Less than 95% RH without condensation Battery: 1 x 103450 1800mAh polymer lithium battery (shipped with built in battery) Standby Time: More than 8 hours of continuous operation Backlit Color Display: Yes Chinese English Bilingual Choice: Support Sound, Light, Vibration Alarm: Support Data Storage: 120000 Power Supply Mode: USB direct charging Sensor Calibration: Support. Package List: 1 x Combustible Gas Detector1 x Plug 1 x Data Cable 1 x Hose 2 x Accessory 1 x Storage Box 1 x Storage Bag