Geiger Counter CPS to Dose Rate Converter Select detector model and enter CPS to estimate radiation dose rate. Detector Type: -- Choose Detector -- SBM20 (Typical Conversion Factor: 7.5 µSv/h per 1000 CPS) J308 (Typical Conversion Factor: 3.3 µSv/h per 1000 CPS) J1643 (Typical Conversion Factor: 0.9 µSv/h per 1000 CPS) Custom Detector Counts Per Second (CPS): Custom Conversion Factor (µSv/h per 1000 CPS): Convert to Dose Rate Download as PDF