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Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer
  • Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer

Multi Gas Monitor Handheld gas detector Oxygen O2 H2S Carbon Monoxide CO Combustible Gas 4 in 1 gas analyzer

Item No.: AS8900
INQUIRY
Model ST8900 AS8900

Color

Orange

Yellow

Material

ABS plastic

ABS Plastic

Power Supply

3.7V li-battey(Bulit-in)

3.7V li-battery(Built-in)

Operation Temperature

-10°C-50°C

-10°C-50°C

Operation Humidity

15%-95%RH

15%-95%RH

low/High alarm/alarm setting

Yes

Yes

Gas Type

O2/CO2/H2S/Combustible Gas

O2/CO2/H2S/Combustible Gas

Battery working time

6 hours(no alarm)

6 hours(no alarm)

Warm up time

<20 seconds

<20 seconds

Resolution

CO: 1ppm, H2S: 1ppm, O2: 0.1%VOL, LEL: 1%LEL

CO: 1ppm, H2S: 1ppm, O2: 0.1%VOL, LEL: 1%LEL

Maximum open circult voltage

≤4.2V

≤4.2V

Package size

26*21*7cm

26*21*7cm

Pcakage Contents

1*Multi-Gas meter
1*Instruction manual
1*Charging adapter
1*USB cable
1*Calibration certificate

1*Multi-Gas meter
1*Instruction manual
1*Charging adapter
1*USB cable
1*Calibration certificate

 
Sensor specification

Gas

Range

Resolution

T90

Oxygen (O2)

0~30%

0.1%

10sec

Combustile (LEL)

0~100%LEL

0.1%

35sec

Carbon Monoxide (CO)

0~999ppm

1ppm

50sec

Hyrogen Sulfide (H2S)

0~500ppm

1ppm

30sec

 
The effect of oxygen-deficient and oxygen-enriched atmospheres

The concentration of oxygen(%)

Symptoms (atmospheric pressure)

100%

Deadly, 6 minutes(Absolutely airtight environment, such as hyperbaric oxygen chamber

50%

Deadly, can be cured after 45 minutes treatment. (Absolutely airtight environment, such as hyperbaric
oxygen chamber)

>23.5%

Rich oxygen

20.9%

Normal

19.5%

Mini mum

15~19%

Reduce efficiency, and lead to problems of head,lung and circulation system

10~12%

Shortness of breath, loss of judgment, purple lips

8~10%

governance loss, syncope, unconscious, pale, nausea and vomiting

6~8%

8 minutes, blood pressure, weak heartbeat,mouth breathing, quickly stopped breathing

4~6%

40 seconds, convulsions, respiratory arrest, death

Harm of carbon monoxide

Content of carbon monoxide in Air

Suction time and showed symptoms of poisoning

50ppm

Maximum

200ppm

2~3 hours , a slight headache, dizziness, nausea

400ppm

2hours, forehead pain, life risk after 3hours

800ppm

Headache, nausea within 45minutes,death within 2~3hours

1600ppm

Headache, nausea within 20 minutes ,death within 1 hour

The concentration of and symptoms of poisoning

Range

Symptoms of poisoning

Unit: ppm

Unit: mg/m3

0.025~0.1

0.035~0.14

Olfactory sensation

50~100

70~140

Slight symptoms of poisoning within 1~2 hours

100~150

140~210

Olfactory nerve paralysis,obvious poisoning symptoms

200~250

210~350

Can afford 0.5~1 hour, but sequela

200~350

350~490

Poisoning in 6~8 minutes,death within 4~8 hours

350~500

490~700

Seriously poisoned within 0.5~1hour,death within 1~4 hours

500~600

700~835

Seriously poisoned within 1minute,death within 0.5~4 hours

600~700

835~980

Death within 2~15 minutes

700~1000

980~1400

Imediately die

 

 

 

Commonly used flammable gas explosion limit Table

Name

Chemical for mula

The explosion limit in air (V%)

Upper limit LEL

Lower limit LEL

Methane

CH4

5

15

Ethane

C2H6

3

15.5

Propane

C3H8

2.1

9.5

Butane

C4H10

1.9

8.5

Gasoline(Liquid)

C4-C12

1.1

5.9

Kerosene(Liquid)

C10-C16

0.6

5

City gas

 

4

 

liquefied petroleum gas

 

1

12

Turpentine(Liquid)

C10-C16

0.8