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Graetz Doserate Measuring System X 5 CEx

Graetz Doserate Measuring System X 5 CEx

Dose rate meter with alarm function for personal radiation protection and dose rate detection when handling ionising radiation in explosive atmospheres, with connection facility for the gamma probe 18550CEx.

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Doserate Measuring System X 5 CEx

for the use in  explosion-endangered atmospheres 

Please note: The X 5CEx optically corresponds to the doserate meter GRAETZ “X 5 C plus“.

    • PTB-approved doserate meter for measuring gamma radiation and X-rays
    • measuring size: ambient doserate equivalent H*(10)
    • detector: energy compensated Geiger-Müller-tube
    • large digital indication of measured values on LC display (illuminable)
    • additional quasi-analog doserate indication (3,5 decades, logarithmic bar graph)
    • indication of peak and average value of doserate
    • 4 free programmable dose and doserate alarm thresholds
    • automatic or manual storage of dose and doserate values together with date and time
    • indication of residual time for staying in the current radiation field with regard to the maximum allowed dose
    • switchable acoustic single-pulse indication
    • menu driven operator guidance for easy operation, partly secured by password
    • storage of set parameters also when device is switched off or during battery replacement
    • continuous self testing and monitoring ensures high reliability
    • metallized, compact housing of high impact-proof plastic (easily to decontaminate), sealed for submersion up to 1 m depth (IP 67)
    • power supply by firmly installed accumulator
    • automatic probe identification
    • EMC-proof
    • Absolutely necessary accessories:
    • – recharger “461L” for recharging the built-in accumulator

    • Optional accessories:
    • – probe

“18 550 CEx”

    •  for measurements at “hard-to-get-to” places
    • – probe cable “CEx”, length: 1,25 m – not extendable
    – leather bag “D” for accommodating the basic unit, the probe and the cable

Basic unit X 5 CEx



Probe 18 550 CEx


Doserate measuring range:  

1,0µSv/h – 20 mSv/h



10µSv/h – 20 mSv/h


Doserate indication range:  

0 nSv/h – 20 mSv/h


Dose indication range:  

0 nSv – 10 Sv


Energy range:  

40 keV – 1,3 MeV



75 keV – 1,3 MeV


Doserate alarm thresholds:  

4, free programmable, 0µSv/h – 20 mSv/h


Dose alarm thresholds:  

4, free programmable, 1µSv – 10 Sv


Temperature range:  

-20°C up to +40°C


Power supply:  

9V-accumulator (firmly installed)



from the basic unit


Dimensions / Weight:  

(152 x 82 x 39) mm

approx. 475 g



diameter=40 mm, length=126 mm

approx. 250 g


PTB-Approval No.:  






ATEX-Approval No.:  

BVS PP 04.2028 EG



  II 2G EEx ib II BT6; I M2 EEx ib I  




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