Gamma Alarm 500B
GAMMALARM 500B -Radiation Activated Area Warning Device
When switched on, an amber light flashes to give a pre-exposure warning. When the source is exposed and the dose rate exceeds 7,5 micro Sv/h, the amber light goes out and a red flashing warning light indicates "Radiation Present". There is also a manually triggered audible siren which can sound when the amber light is on.
Powered by rechargeable battery. Supplied with charging lead for connection to 230V AC.