The Guardian Personal Radiation Alarm provides both audible and visual indication of Gamma and X-Ray. The Guardian alarm is not a calibrated instrument and should only be used in conjunction with a calibrated Radiation Monitor.
Radiation Detected & Alarm Signal
Gamma and X-rays 45KeV to 2MeV. High pitched audible pulses with simultaneous high intensity red flashing LED
Background radiation produces one pulse every 20-30 mins
10 microSv/hr produces pulses at 25 second intervals
Power & Battery Life
9V PP3 Battery. Life at background radiation 3 months