Overmolded composite construction provides a rugged design that has exceptional durability in harsh, industrial environments. One instrument can be carried for continuous monitoring or be used with the integrated sampling pump for sample-draw applications such as confined space entry testing. Lithium-ion extended range battery pack offers 20 hours of continuous use. Compact size and weight enables true portability as a personal monitor when used with or without the pump. IP66/67 Certified ensures that the monitor can withstand use in extremely dusty and wet applications. Broad sensor measuring ranges for carbon monoxide to 1000 ppm, hydrogen sulfide to 500 ppm, nitrogen dioxide to 150 ppm and sulfur dioxide to 150 ppm provide the ability to see changes in hazardous conditions beyond normal monitoring ranges.