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Product DescriptionSMART SENSOR Multi-Gas Monitor AS8900 Handheld gas detector Oxygen O2 Hydrothion H2S Carbon Monoxide CO Combustible Gas 4 in 1 Multi-Gas gas analyzer 
1. All products with original packaging box, so that can protect the products well on the shipping way avoid damage.
2. Customs tax: don’t worry customs tax, we will declare lower value on bill and help customer avoid or reduce tax.
3. The product does not contain the battery because of the limitation of the airline company.
4. Warranty: All units are with Retail box. and we offer Long warranty period of 2 years,in two years will repair for free.
5. Shipping Way: if you need it faster, you can choose Aliexpress standard shipping,also have China post airmail !
Smart Sensor gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak and interface with a control system so a process can be automatically shut down. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave. This type of device is important because there are many gases that can be harmful to organic life.
Gas detectors can be used to detect combustible, flammable and toxic gases, and oxygen depletion, etc. This type of device is widely used in industry and can be found in locations, such as on oil rigs, to monitor manufacture processes and emerging technologies such as photovoltaic. They may also be used in firefighting.
While many of the standard gas detector units were originally fabricated to detect one gas, modern multifunctional or multi-gas devices are capable of detecting several gases at once. Some detectors may be utilized as individual units to monitor small workspace areas, or units can be combined or linked together to create a protection system.
| Brand | SMART SENSOR | | Color | Yellow | | Material | ABS plastic | | Gas Type | Oxygen / Carbon Monoxide /
Hydrothion / Combustible Gas | | Resolution | 0.1% / 1μmo/mol(ppm) / 1% | | Measuring Principle | Electrochemical principle life for 2 years | | Low / High Alarm / Alarm Setting | V | | Alarm | Sound, Light Alarm. Adjustable Alarm values,
Alarm sound up to 80 db. | | Operating temperature | -10~50℃ (except LEL is 0 ~40℃ ) | | Operating humidity | 15%-95%RH (Standard) | | Power | 3.7V li-battery (Built-in) | | Battery working runtime: | 8-10 hours. And 4-6 hours work with AS8930 sampling pump. (work in room temperature and no alarm conditions.) | | Product Net Weight / Size | 200g / 120.2*64.5*38.3mm | | Packing | Gift Box | | Packing Contents | 1pc AS8900 4 in 1 muilt gases monitor
1pc User manual
1pc Carrying brouch
1pc 3.7V rechargable lithium battery
1pc Charging adaptor | | 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% | Minimum | | 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 Hydrogen 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 | |
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