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The Extech Carbon Monoxide Detector offers easy one-button operation and is designed to detect CO levels from 0 to 1000 PPM with +/-5% accuracy. Perfect for industrial settings where CO accumulation may occur, this detector features an audible alarm that starts at 35 ppm and becomes continuous when readings surpass 200 ppm. Its backlight display allows for easy reading in low-light conditions. With its gas-specific sensor and stabilized electromechanical technology, the Extech Carbon Monoxide Detector is an essential tool for ensuring safety in a wide range of applications.