Which device is an example of a survey meter?

• A. OSLD
• B. Geiger-Mueller counter
• C. TLD
• D. Electronic dosimeter

Answer: (B)

Survey meters are portable instruments used to quickly assess ambient radiation levels in a area, giving real-time readings so you can sweep a space and pinpoint where radiation is present. The Geiger-Mueller counter fits this role because it’s designed as a handheld device that provides immediate counts per minute or dose-rate readings, making it ideal for surveying rooms, around equipment, and locating sources of radiation. It’s the classic tool for area monitoring and rapid assessment of radiation levels. In contrast, optically stimulated luminescence dosimeters and thermoluminescent dosimeters are passive devices that record dose over a period and require a reader later, not real-time area surveys. An electronic personal dosimeter, while it can show real-time readings, is typically used for monitoring an individual’s exposure rather than surveying an entire area. So the Geiger-Mueller counter is the best example of a survey meter.