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Detection Gas | CO | H2S | Ex / LEL / CH4 | O2 | |||
Range | 0-1000 ppm | 0-100ppm | 0-100% LEL | 0-30.0%VOL | |||
Test content | 70/300/700 ppm | 20/50/80ppm | 10%/40%/60%LEL | 5%/15%/25%VOL | |||
Indication error | Absolute error:±5ppm | ±5 ppm | ±5%FS | ±3%FS | |||
Relative error:±10% | |||||||
Duplicate value | ≤2% | ≤2% | ≤2% | ≤1% | |||
Zero drift | ±3ppm | ±5ppm | ±2%FS | ±1% | |||
Span drift | ±5% | ±5ppm | ±3%FS | ±1% | |||
Alarm value | 50/150ppm | 10/35ppm | 20/50%LEL | 19.5/23.5%VOL | |||
Response time | Diffuse≤60S | ||||||
Alarm type | low & high alarm, multiple gas alarm, sensor alarm, battery low alarm, prompt tone, automatic shutdown alarm | ||||||
Operating temp | Temperature -10 ℃ -50 ℃; humidity <95% RH without condensation | ||||||
Operating Vol | DC3.7V (3000mAh lithium battery capacity) | ||||||
Explosion-proof mark | Ex ib IIB T3 Gb | ||||||
Protection grade | IP65 | ||||||
Backlight | Automatically activated when working in poor lighting environment or the alarm sounding or the button is knobbed down. | ||||||
Charging time | 6h-8h | ||||||
Standby time | More than 8h continuous | ||||||





NO | Name | Description |
1 | Real-time value | Display the current actual gas concentration value |
2 | Gas name | Show gas name |
3 | Time | Display the current time (manual adjustment) |
4 | Call the police | As shown in the figure, the total alarm sound, light, and vibration are turned on (the buzzer alarm can be turned off separately). When displayed, it indicates that the total alarm is turned off |
5 | USB socket | This symbol is displayed when the USB is inserted |
6 | Shock | This symbol appears when the device is in a vibration |
7 | Alarm occurred | This symbol appears to indicate that the equipment inspection is in an alarm state |
8 | Storage status | The display ■ indicates that the device is in the state of stopping data storage. When it displays ▶, the device is in the state of storing data |
9 | Buzzer | As shown in the figure, the buzzer is normally enabled and displayed when the buzzer is disabled |
10 | Battery | When the alarm is off, the buzzer cannot be enabled |
11 | Proportion | Display the current remaining battery level |

Detected gas | Detecting scope | Resolution | Low/High Alarm Point | Dection Accuracy |
EX | 0-100%LEL | 1%LEL | 20/50LEL | ±5%(F.S) |
O2 | 0-30%VOL | 0.1%VOL | 19.5%VOL/23.5%VOL | ±5%(F.S) |
H2S | 0-100PPM | 0.1PPM | 10PPM/20PPM | ±5%(F.S) |
CO | 0-1000PPM | 1PPM | 50PPM/150PPM | ±5%(F.S) |
CO2 | 0-5000PPM | 1PPM | 1000PPM/2000PPM | ±5%(F.S) |
NO | 0-250PPM | 1PPM | 50PPM/150PPM | ±5%(F.S) |
NO2 | 0-20PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
SO2 | 0-20PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
CL2 | 0-20PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
H2 | 0-1000PPM | 1PPM | 50PPM/150PPM | ±5%(F.S) |
NH3 | 0-100PPM | 0.1PPM | 20PPM/50PPM | ±5%(F.S) |
PH3 | 0-20PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
HCI | 0-20PPM | 0.001PPM | 5PPM/10PPM | ±5%(F.S) |
CLO2 | 0-50PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
HCN | 0-50PPM | 0.01PPM | 10PPM/20PPM | ±5%(F.S) |
C2H4O | 0-100PPM | 0.1PPM | 20PPM/50PPM | ±5%(F.S) |
O3 | 0-10PPM | 0.1PPM | 2PPM/5PPM | ±5%(F.S) |
CH2O | 0-20PPM | 0.1PPM | 5PPM/10PPM | ±5%(F.S) |
HF | 0-100PPM | 0.01PPM | 2PPM/5PPM | ±5%(F.S) |


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