GMC 300 should work for that.
https://www.amazon.com/GQ-GMC-300E-Plus-Radiation-dosimeter-monitoring/dp/B00HOUW066/ref=asc_df_B00HOUW066/?tag=hyprod-20&linkCode=df0&hvadid=312328848881&hvpos=&hvnetw=g&hvrand=12188988198959332797&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9016722&hvtargid=pla-562543902959&psc=1