Which device is described as all-in-one continuous monitoring for VOCs, oxygen, toxic and combustible gases, capable of monitoring up to eight threats at a time?

• A. MultiRAE Pro
• B. PID
• C. LEL Meter
• D. Area Array

Answer: (A)

This question tests the idea of a single portable device that continuously watches for multiple hazard types at once. The unit described is designed as an all-in-one monitor that can handle VOCs, oxygen, toxic gases, and combustible gases, with the ability to configure up to eight different sensor threats on a single instrument. That combination—a portable multi-gas detector with diverse sensor options and multi-channel capability—points to a device like the MultiRAE Pro, which is built to monitor up to eight sensors simultaneously, including VOCs (via a PID), oxygen, toxic gases, and LEL for combustibles. The other options don’t fit this full profile: a PID focuses on VOCs but doesn’t cover the rest; an LEL meter measures only combustible gases; and an Area Array is a fixed-area system, not a portable, all-in-one handheld monitor.