The PCE Instruments radiation meter PCE-RDM 15 is a portable and precise device for monitoring ionising radiation, including beta, gamma and X-rays. With a measuring range of 0.01 µSv/h to 50 mSv/h and a resolution of 0.01 µSv/h, it offers a high accuracy of 10 % of the measured value. The device is equipped with a glass Geiger-Müller counter tube, which is known for its sensitivity. It has a user-friendly LCD display with a size of 2.4 inches, which allows the display of measured values as well as the MIN, MAX and average value functions. The internal memory can store up to 10,000 values and data is transferred via a USB-C interface. The PCE-RDM 15 is suitable for use under various operating conditions and offers both visual and audible alarms to alert users to critical radiation levels.