Thermo Scientific RadEye G20-ER Operating Instructions Manual page 46

The user may as well select R/h as a displayed measuring unit
with the understanding that 1 R/h is simply set equal to 1 Rem/h
and that consequently energy dependant deviations to the expo-
sure rate (and air kerma rate) will occur.
The RadEye G20-10 and G20-ER10 is factory calibrated to the
ambient dose equivalent rate H*(10) in a depth 10 mm for Cs-137
gamma radiation (662 keV).
For details of the response curves see technical data section.
5-2 DB-067 E RadEye G20
Iw/Tr/Ff 26.11.2012