Reliable gas detection is essential when working in environments where hazardous gases may be present. The ATO 4-in-1 multi-gas detector is designed to simultaneously monitor carbon monoxide (CO), oxygen (O₂), hydrogen sulfide (H₂S), and combustible gases (%LEL), helping users quickly identify dangerous atmospheric conditions and improve workplace safety.
This guide explains how to operate the gas detector, including powering on, accessing the menu, performing calibration, configuring alarm settings, managing data logging, exporting recorded data, switching measurement units, restoring factory settings, and viewing system information.

