SMART SENSOR ST8990 Gas Monitor 4 in 1 O₂ LEL CO H₂S

SMART SENSOR ST8990 Gas Monitor 4 in 1 O₂ LEL CO H₂S

SMART SENSOR Gas Monitor 4 in 1 O₂ LEL CO H₂S Gas Detector Rechargeable Alarm Gas Analyzer with Backlight Alarm Function ST8990

1. It is capable of detecting 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H₂S), oxygen(O₂) and combustible gas(LEL).

2. Premium material and selected top quality electronic components ensure excellent sensitivity and accurate measurement.

3. Pocket-size, light weight and ergonomics design make it convenient to carry and use.

4. 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.

5. Backlight enables you to see the value clearly even in dark environment.

6. Two alarm methods: audio alarm and icons showed on the screen.

7. Various functions meet your demand: gas monitoring, peak value display, low alarm setting mode, high alarm/TWA setting mode, etc.

8. It is suitable to be used in petroleum, chemical industry, metallurgy, refining, etc.

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

1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW.
2) Payment must be made within 3 days of order.
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1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO)
2. Orders processed timely after the payment verification.
3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.
4. The images shown are not the actual item and are for your reference only.
5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.
6. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!
7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.

1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS! Shipping cost is bear by both seller and buyer in half.
2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po#.
3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpress. OR, you may choose to have a replacement.
4.  We will bear all the shipping cost if the product(s) is (are) not as advertised.

1. 24 months Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.
2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY.
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