LH-280

4-IN-1 ORTABLE GAS DETECTOR

LH-280 Portable Gas Detector is an explosion-proof pump-suction gas detector certified with CCS Type Approval, CCS Marine Product Certificate and national explosion-proof qualification, purpose-built for marine and industrial working environments. It can simultaneously detect concentrations of oxygen, carbon monoxide, hydrogen sulfide and combustible gas. Equipped with imported modular independent sensors and an imported brushless pump, it supports massive data storage, Bluetooth export and printing, enabling stable, safe and efficient gas concentration monitoring in working environments.

Model

LH-280
（4-IN-1 STANDARD EDITION）

LH-280
（4-IN-1 VLCC SHIPPING CUSTOM EDITION）

Detection Method

Built-in pump suction

Detect Gas/Range/Resolution

Measured Gas

Range

Resolution

Measured Gas

Range

Resolution

Combustible Gas-EX

(0-100)%LEL

1%LEL

Combustible Gas-EX

(0-100)%VOL

0.1%VOL

H₂S

(0-100)PPM

1PPM

H₂S

(0-100)PPM

1PPM

CO

(0-1000)PPM

1PPM

CO

(0-1000)PPM

1PPM

O₂

(0-30)%VOL

0.1%VOL

O₂

(0-30)%VOL

0.1%VOL

Sensor Type

CO、H₂S、O₂：Electrochemical Type；
Combustible Gas-EX：Catalytic Combustion Type

CO、H₂S、O₂：Electrochemical Type；
Combustible Gas-EX：Infrared Type

Sensor Lifespan

CO、H₂S、Combustible Gas-EX： 2-3 Years
O₂：5 Years

CO、H₂S、 2-3 Years
O₂：5 Years
Combustible Gas-EX：10 Years

Alarm

Triple audible, visual and vibrato alarm

Ex-Marking

Ex ib IIC T4 Gb

Working Voltage

DC 3.7V 4000mAh lithium battery

Response Time

(O₂、CO、Combustible Gas-EX)T90≤30S，(H₂S)T90≤60S

Operation Time

2-3 hours charging, continuous working >10 hours

Working Environment

Temperature-20°C-+50°C; Humidity <95% RH (non-condensing）

Size and Weight

249x76x83(mm）/约510g

Features&KeyHighlights

1、Modular independent sensors for simultaneous O2/CO/H2S/EX detection, no interference
2、Built-in pump-suction sampling; imported brushless pump runs up to 10,000 hours
3、Multiple alarms: blockage alarm, sensor failure warning, over-limit alarm
Stores 16,000 records automatically; supports Bluetooth export and printing
4、Ex ib IIC T4 Gb explosion-proof, IP67 rated; battery life over 10 hours
5、Triple certifications (ISO9001 / CCS / national explosion-proof).

Model	LH-280 （4-IN-1 STANDARD EDITION）			LH-280 （4-IN-1 VLCC SHIPPING CUSTOM EDITION）
Detection Method	Built-in pump suction
Detect Gas/Range/Resolution	Measured Gas	Range	Resolution	Measured Gas	Range	Resolution
	Combustible Gas-EX	(0-100)%LEL	1%LEL	Combustible Gas-EX	(0-100)%VOL	0.1%VOL
	H₂S	(0-100)PPM	1PPM	H₂S	(0-100)PPM	1PPM
	CO	(0-1000)PPM	1PPM	CO	(0-1000)PPM	1PPM
	O₂	(0-30)%VOL	0.1%VOL	O₂	(0-30)%VOL	0.1%VOL
Sensor Type	CO、H₂S、O₂：Electrochemical Type； Combustible Gas-EX：Catalytic Combustion Type			CO、H₂S、O₂：Electrochemical Type； Combustible Gas-EX：Infrared Type
Sensor Lifespan	CO、H₂S、Combustible Gas-EX： 2-3 Years O₂：5 Years			CO、H₂S、 2-3 Years O₂：5 Years Combustible Gas-EX：10 Years
Alarm	Triple audible, visual and vibrato alarm
Ex-Marking	Ex ib IIC T4 Gb
Working Voltage	DC 3.7V 4000mAh lithium battery
Response Time	(O₂、CO、Combustible Gas-EX)T90≤30S，(H₂S)T90≤60S
Operation Time	2-3 hours charging, continuous working >10 hours
Working Environment	Temperature-20°C-+50°C; Humidity <95% RH (non-condensing）
Size and Weight	249x76x83(mm）/约510g

LH-280

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