What is a common tool used for monitoring radiation in laboratories?

The Geiger-Müller counter is one of the most common tools used for monitoring radiation in laboratories because it is specifically designed to detect and measure ionizing radiation, including alpha particles, beta particles, and gamma rays. This device works by utilizing the ionization effect that radiation has on a gas within a tube, producing detectable electronic pulses that can be counted and converted into a measure of radiation levels.

Radiation monitoring is crucial in laboratories, especially those dealing with radioactive materials, to ensure safety and compliance with regulatory standards. The Geiger-Müller counter is valued for its portability, ease of use, and ability to provide immediate readings, making it suitable for various applications in both fieldwork and controlled environments.

The other options listed do not serve the same purpose. Infrared thermometers measure temperature, conductivity meters gauge the electrical conductivity of solutions, and while a radiation flux meter can measure radiation intensity, it is less commonly used in laboratory settings compared to the Geiger-Müller counter for everyday monitoring tasks.