Handheld 4 in 1 Gas Detector for CO, H2S, O2, and LEL Monitoring with Digital Display



4 in 1 gas detector is a versatile and portable digital device designed to monitor toxic gases like carbon monoxide (CO), hydrogen sulfide (H2S), oxygen (O2), and lower explosive limit (LEL) levels. With a high-resolution display, it provides accurate measurements for various gases:

  • O2 measurement range: 0~30%, resolution: 0.1%
  • CO measurement range: 0~999PPM, resolution: 1PPM
  • H2S measurement range: 0~100PPM, resolution: 1PPM
  • LEL measurement range: 0~100%, resolution: 1%

The device features an adjustable alarm system with flash, vibration, and buzzer alerts, ensuring safety in diverse environments such as mines, metallurgical plants, petrochemical facilities, power stations, and municipal areas. It operates efficiently in temperatures ranging from -10℃ to 50℃ and humidity levels from 15% to 90% RH (non-condensing). Powered by a built-in 3.7V lithium battery, this gas detector is reliable and easy to use, making it essential for maintaining air quality and safety.

Free Shipping

Under normal circumstances we offer free shipping on all orders, you will see the free shipping option in your cart at checkout. There is no choice of carrier for free shipping, but typically we will ship your order will likely ship using either USPS or FedEx. Full Shipping Policy

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). Full Returns Policy

When Will My Order Ship?

For Standard Shipping, we aim to pack and ship out your order within 3 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing.
We ship five days a week, Monday through Friday. Sometimes our mail pickup comes in early afternoon, so tracking for orders shipped later that day may not update until the following business day.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.

Can I Change The Shipping Address On My Order?

Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.
If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.

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Handheld 4 in 1 Gas Detector for CO, H2S, O2, and LEL Monitoring with Digital Display
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