Single-Gas Monitor standard with a low maintenance and compact size, the Macurco Portable Single-Gas Monitor helps you detect potentially hazardous levels of O2, H2S or CO gas. It provides you with reliable, continuous 2-year performance at an affordable price. The Macurco Single-Gas XL Monitor offers all the simplicity, reliability and ease-of-use of our standard portable Single-Gas monitor with lower resolution and more flexibility and lifespan features. The Macurco Single-Gas XL Monitor features a factory replaceable battery and sensor to help reduce total cost of ownership: instead of replacing your Macurco Single-Gas XL Monitor in a few years, you can replace batteries or sensors that helps better predict future capital costs. The Macurco Single-Gas XL Monitor also allows you to measure at a lower resolution. The Macurco Single-Gas XL Monitor allows the choice of two additional alarm set points: Short Term Exposure Limit (STEL) and Time Weighted Average (TWA) exposure (H2S and CO). With its 2-year warranty on electronics, battery and H2S and CO sensors, the Macurco Single-Gas XL Monitor is designed to deliver for the long term.