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The MQ-9 gas sensor module has high sensitivity to Carbon Monoxide, Methane, and LPG. The sensitive material used in the MQ-9 gas sensor is SnO₂, which has lower conductivity in clean air. It detects gases by cycling high and low temperatures: at low temperatures (heated by 1.5V), it detects CO; at high temperatures (heated by 5.0V), it detects Methane, Propane, and other combustible gases while cleaning out previously adsorbed gases. MQ-9 is commonly applied in domestic gas leakage detectors, industrial gas detectors, and portable gas detectors.
* Product Images are shown for illustrative purposes only and may differ from actual product.
At ROBODIUM™, we want you to be completely satisfied with your purchase. You may return most items within 7 days of delivery for a full refund or exchange.
Most items sold on ROBODIUM™ can be returned within the return window, including:
To be eligible for a return, items must be:
Note: Products damaged due to misuse, modification, static discharge, soldering, or improper handling may not be eligible for return.
We arrange the return pickup for you — hassle-free returns similar to major e-commerce platforms.
All products include a minimum 15-day warranty against manufacturing defects, unless otherwise specified on the product page.
Warranty does not cover misuse, soldering damage, modifications, physical damage, or incorrect electrical connections.
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