AO-K400 Portable Multi-gas Detector for CO, H2S, O2 and LEL (Lower Explosive Limit)

Advanced MCU for Low-Power Consumption
●    LCD display
●    Self-Test Function
●    Adjustable alarms
●    Two Instant Alarm Points
●    Audio, Visual LED and Vibratory Indicators
●    Three buttons Operatioin for Simple Use
●    Strong, Durable Rubber Casing Provides Anti-Slip Handleability
●    500 pcs alarming record data logger
●    Can be connected with computer Module monitoring, Sensor setup, Alarm Record
●    Colorful LCD gas curve display
●    Available for CO, H2S, O2 and combustible gas
●    Rechargeable
●    Comply with ATEX
●    2 years warranty

Range:
O2: 0-30% by Volume 
LEL: 0-100% LEL
CO: 0-1000 ppm 
H2S:0-100 ppm

Alarm Points:
CO: 35 and 200 ppm instant
H2S: 10 and 15 ppm instant
O2: 19.5 by Vol. decreasing and 23.5% by Vol. increasing
LEL: 20% and 50% LEL

Method of Detection: Diffusion

Sensor: CO, H2S and O2-Electrochemical Combustible Gases-Catalytic

Display: LCD

Temperature: -20℃~60℃

Humidity: 5 to 95% RH, non-condensing

Power: 3.7VDC 2000mA rechargeable lithium battery

Operating time: Approximately 15 hours Continuous, non-alarm conditions

Charge Time: Approximately 6 hours

Dimensions: 40mm*64mm*34mm

Sound: 85 dB at 1m

Weight: 210g

Ingress Protection: IP65

The Lower Explosive Limit (LEL) is the lowest concentration of a gas or gas vapour that will burn in air.
The Lower Explosive Limit (LEL) varies from gas to gas. For most flammable gases it is less than 5% by volume.