A Geiger counter (also known as a Geiger–Müller counter) is an electronic instrument used for detecting and measuring ionizing radiation. It is widely used in applications such as radiation dosimetry, radiological protection, experimental physics and the nuclear industry.
Auto-Ranging Digital Meter Internal Energy-Compensated GM Detector Range: 0.001 to 50 mSv/h (0.1 to 5000 mR/hr) Includes Data Logging Capability
5-Range Analog Meter Two Internal Energy-Compensated GM Detectors Range: 0 to 20 mSv/h (0 to 2000 mR/hr)
3-Range Analog Meter Internal Energy-Compensated GM Detector Range: 0 to 10 mSv/h (0 to 1000 mR/hr)