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The Rad Alert 100 is the next generation area monitor that includes a built in GM Gamma detector for monitoring rooms where radio nuclides may be present or where devices producing radiation may be located. This unit includes a devoted panel to display total exposure time on a remote alarm that is tethered to the primary alarm. The primary alarm contains a digital threshold panel that indicates the level at which the alarm will trigger. The monitor has a backup powered by either rechargeable NiMH or alkaline AA batteries. The rechargeable batteries are maintained on a trickle charge. The detector unit has an adjustable trigger level with the level displayed on a digital display. The slave unit contains an audible buzzer with an adjustable volume control that can be turned on or off with a switch mounted on the side of the unit. Includes a 30 meter cable for easy connection between monitor and remote alarm.

This unit can be upgraded to the RadAlert 200 for additional functionality.

RadAlert 100 detector

Indicated use

 Radiation area monitoring


Internal GM detector range

  0.5 mR/hr to 1000 mR/hr 






 4 digit LED display with 0.4 in (1 cm) character height


Display range

 000.0 to 200


Display units




 Reading within ± 10% of true value with detector connected



 Typically 1 second from onset of radiation



 (green light) Indicates the instrument is functioning properly & power is on



 Indicated by a flashing red light and audible buzzer









 indicated by red LED 8 AA NiMH on trickle charge in remote station


Calibration controls

 Accessible from potentiometer on top of unit








Dead time

 < 10% at max exposure rate








Data output


(current sink), and direct connection to battery and ground


Power requirements

 12 VDC universal adaptor may be plugged into either main detector unit or remote alarm


Battery life

 7-9 hours


Battery charger

 Battery is continuously trickle charged when instrument is connected to line power



 ABS Plastic Enclosure


Temperature range

 0º to 130ºF (- 18º to 54ºC). 



 4.4 (w) x 2.4 (d) x 8.5 in (h) (11.2 x 6.1 x 21.6 cm)



 6.5 lb (2.3 kg)




Remote Station

Indicated use

 Remote display for RadAlert 100 & 200



 (green light) Indicates the instrument is functioning properly & Power is on



(flashing LED) Indicates the radiation level exceeds the high alarm point flashing LED) 



Detector fail

 Indicated by red LED



 Piezo Buzzer type with ON/OFF switch and adjustable volume


Power requirements

 12 VDC universal adaptor 



 ABS Plastic Enclosure




 0º to 130ºF (- 18º to 54ºC). 



 9.5 (w) x 2.5 (d) x 6 in (h) (22.9 x 6.4 x 15.2 cm)



 1.5 lb (0.7 kg)