The 740 provides a dependable, economical solution for navigating the hazards of confined space. It simultaneously monitors oxygen, combustible gases, carbon monoxide and hydrogen sulfide. Standard features include Peak, STEL and TWA readings, lithium-ion battery, power supply adapter, universal infrared port, alligator clip, and self-test functionality mode.

• Large LCD with designated line for each sensor reading
• Measuring ranges: Carbon Monoxide (CO) = 1-999 ppm in 1 ppm increments, Hydrogen Sulfide (HS) = 0-500 ppm in 1 ppm increments, Oxygen (OX) = 0-30% in 0.1% increments, Combustible (EX) = 0-100% LEL in 1% increments
• LED = high/low; audible: 95 db @ 1" alarms/indicators
• -40°F-122°F operating temperature
• Combustible (catalytic bead); Oxygen and Toxics (electrochemical) sensors
• 18-month warranty
• Peaks, STEL, TWA readings
• Standard rechargeable Li-Ton battery
• Up to 18 hours operating time
• Dimensions: 4.3"x2.45"x1.3"