Which of the following is a common radiation detection device?

The Geiger counter is a widely recognized radiation detection device commonly used across various industries, including industrial radiography. This instrument is designed to detect and measure ionizing radiation, which includes alpha particles, beta particles, and gamma rays.

Geiger counters work by employing a Geiger-Müller tube that produces an audible click or visual signal when radiation interacts with the gas inside the tube, converting the energy from radiation into measurable electrical impulses. This makes it particularly valuable for radiation safety personnel, who rely on these devices to monitor radiation levels in their work environment, ensuring compliance with safety regulations and protecting personnel from potential overexposure to radiation.

In contrast, the other options listed do not function as radiation detection devices. A pressure gauge measures pressure, a thermometer measures temperature, and a voltmeter measures electrical potential difference. None of these instruments are equipped to detect or measure the presence of radiation, making them unsuitable for tasks related to radiation safety monitoring.