This standard specifies scintillation type and ionization chamber type monitors (hereinafter referred to as monitors) that are installed around nuclear facilities and radiation facilities and continuously monitor the dose rate of environmental gamma rays.
JIS Z 4325:1994 history
2008JIS Z 4325:2008 Equipment for continuously monitoring gamma radiation in the environment
1994JIS Z 4325:1994 Continuous type environmental gamma-ray monitors