GammaSmart one/two

Dose rate alarm unit for the personal radiation protection when handling ionising radiation


Fields of application

NDT, Industry, Mining, Offshore, Refineries, Chemical Industry, Civil Protection, except for explosion endangered areas



The dose rate alarm unit GammaSmart two is a very robust, battery operated and easy to handle pocket-sized dose rate alarm unit designed for the personal radiation protection.

The instrument detects gamma radiation and X-rays, indicating these with clear optical and  acoustical single pulses. An increasing dose rate leads to an increasing pulse rate.

The splashproof aluminium housing (IP54) ensures a shielding against electromagnetic influence. An optical battery control indicates the GammaSmart's readiness for use.

A plastic clip is used for attaching the instrument to the clothing.

GammaSmart two V40 with a dose rate alarm threshold at 40 µSv/h.


The GammaSmart one for the use in potentially explosive atmospheres of zone 1 is no more available.



Technical Data

Kind of radiation gamma radiation / X-rays
Detector GM tube
Sensitivity counting rate at 3 µSv/h
approx. 6 counts/minute
Ambient background radiation approx. 1 count in 2 minutes
Temperature range -20°C up to +40°C
Power supply 2 batteries 1.5 V (type AAA)
Housing aluminium

(72 × 60 × 22) mm
approx. 100 g (with batteries)

Optional dose rate alarm threshold     40 µSv/h