Which piece of equipment is often described as "the dart looking things" used for measuring?

The piece of equipment referred to as "the dart looking things" is typically a type of monitor known for measuring toxic levels in the environment, often resembling a dart or cylindrical shape. These monitors are crucial for detecting the presence of harmful substances in various settings, including industrial, laboratory, and emergency response scenarios. They can give real-time readings of toxic gases or vapors, which helps technicians determine whether an area is safe or if protective measures are needed.

Understanding the context of hazardous materials work makes it clear why monitoring toxic levels is vital. Exposure to hazardous substances can lead to serious health risks; therefore, having accurate and reliable measurements is fundamental for the safety of personnel and the surrounding environment.

In contrast, while other options like pressure, temperature, and flammability measurements are important in hazardous materials operations, they do not specifically align with the description provided. Each piece of equipment serves a distinct purpose, but the unique shape and application of the toxic level monitors are what make the reference to "dart looking things" particularly relevant to measuring toxic substances.