Detector retrofit program to improve your production

Especially in low radiation conditions, our highly sensitive detectors improve the signal to noise ratio, resulting in superior performance when compared to competing system. Replacing your existing detector with a more sensitive Berthold detector will delay source replacement, which is costly, time consuming what is resulting in superior measurement performance compared to competing systems. Source replacement is costly, time consuming, and does not work towards a reduction in overall site source activity.

Berthold's retrofit solution

Compare our detector types










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Size Ø / length [in mm] and material

50 x 50 (Nal/TI)
40 x 35 (Nal/TI)
25 x 25 (Nal/TI)
  50 x 60 (Polymer)

150 x 150

50 x 500 up
to 50/2000

up to 50 x 8000 
22 x 170
40 x 50 (NaI/Tl)

Typ. Applications

Density, level, level switch, multiphase levelDensity, levelLevelLevelLevel switchDensity


≤ 0.002 % per °C≤ 0.01 % per °C≤ 0.01 % per °C≤ 0.02 % per °C≤ 0.05 % per °C

≤ 0.002 % per °C (over 100°C temperature regime)

Typical sensitivity 

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  • Low background
  • Compact design
  • Highest sensitivity
  • Operation with extremely low activities
  • Used for thick-walled vessels and big tanks
  • Sensitive scintillation technology for lowest dose rates
  • Long measuring ranges
  • Universally applicable
  • Most cost-efficient for simple level switch applications
  • Compact design
  • Rugged design to withstand high vibrations and mechanical shock
    (up to 500 g)
  • Based on the superior SiPM technology
  • Cycle time of 100ms for highspeed measurements