The MUYA WT8822 Hydrogen Sulfide Monitor is a compact, electrochemical-sensor gas detector that reads H2S concentration in multiple units (PPM, %VOL, mg/m3, and %LEL) up to 100 PPM, with a sub-30-second response time for fast hazard warning. It includes MAX/MIN recording, adjustable alarms, field calibration, and selectable C/F display, giving technicians flexibility for spot checks in confined or hazardous spaces. It runs on standard AAA batteries with auto or manual shut-off, making it a portable companion to Muya's other gas-monitoring instruments.