Low cost, full-featured, disposable single gas monitor for detection choice of O2, CO, H2S or SO2. Operating life of two full years. Compact & rugged. IPX5/IPX7 rated protection against water ingress. Over-molded boot. One button operation. Large display. Loud alarm. Top & front mounted bright LED. Available with built-in vibrating alarm. Event logger standard (latest 20 events, including sensor type, max readings, average readings, time and duration). Displays service life remaining unless alarm condition is present.