Professional SMART SENSOR ST8990 Gas Monitor Rechargeable 4in1 O₂ LEL CO H₂S Gas Detector Tester Sensor With Backlight Alarm

Introduction: The Multi-Gas Meter is a portable and handheld instrument that is capable to use continuously monitoring four different gas: O₂, LEL, CO, H₂S, when detected these gases, all the concentration will displayed on the LCD. The unit also provided user to configure high and low alarms, also STEL/TWA alarm function. The unit has audio and visual alarm once the alarm condition is exceeded. Features: It is capable of detecting 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H₂S), oxygen(O₂) and combustible gas(LEL). Premium material and selected top quality electronic components ensure excellent sensitivity and accurate measurement. Pocket-size, light weight and ergonomics design make it convenient to carry and use. Built in 2500mAh lithium-ion battery after a full charge allows this alarm to work for 8 hours operation, and work about 6 hours with external gas sampling pump. Backlight enables you to see the value clearly even in dark envment. 2 alarm methods: audio alarm and icons showed on the screen. Various functions meet your demand: gas monitoring, peak value display, low alarm setting mode, high alarm/TWA setting mode, etc. It is suitable to be used in petroleum, industry, metallurgy, refining, etc. Specifications: Brand: SMART SENSOR Model: ST8990 Color: Yellow Material: ABS Carbon Monoxide Range: 0~999ppm Hydrogen Sulfide Range: 0~500ppm Oxygen Range: 0~30%VOL Combustible Gas Range: 0~100%LEL Operation Current: 220mA Short Circuit Current: ≤3A Operation Voltage: 3.7V Maximum Open Circuit Voltage: ≤4.2A Battery: Lithium battery Battery Capacity: 2500mAh Display Type: Segment type LCD Operation Humidity: 15%~95%RH Operation Temperature: 10℃~50℃ Storage Temperature: 0~40℃ Item Size: 11.45 * 6.44 * 4.45cm / 4.50 * 2.53 * 1.75in Item Weight: 200g / 7oz Package Size: 20 * 11 * 7cm / 7.87 * 4.33 * 2.75in Package Weight: 475g / 16.8oz Notes: -Gas monitor only, other acceories are not included. -Due to manual measurement, there may be deviation. -Due to photograph light or other reasons, the item in picture and material object may have slight difference, please in kind prevail. -Please read the manual carefully before you use it. Packing List: 1* Multi-Gas Meter 1* Manual 1* USB Cable

Shipping:

1.We guarantee to ship goods out within 24-72 hour after payment confirmation except holiday. 2.We ship by China post,HKpost,,,according to your choice when placing orders . 3.If you didn't receive the item after 45 days,please feel free to contact us.We will make all our effort to resolve the problem. 4.We are not responsible for delays causedby the customs, duties,taxes or other customscharges.

Warranty:

1.All ithave 1 year guarantee.IF your purchase do not meet merchantable quality, fitne for purpose or match the description, We can make sure your iues are resolved . 2.For wrongly-shipped items, Please contact us in 48 hours after delivery.We will arrange to deliver the correct itor return all your payment. 3.For defective or faulty products,please take photos or videos,we would resend or after confirmation.

About shipping
Shipping and Packaging All itwill be double checked and well packed before sending.Itwill be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for remote areas,it may take a little longer). 

Special Announcement:
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Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.