The specialist for underwater lights
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  Hartenberger Unterwassertechnische Geräte GmbH - The specialist for underwater lights
Hartenberger underwater strobes - 125 TTL digital 250 - TTL digital - 625 TTL digital
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  Alarms
       
  If by mistake you try and take a picture without first switching on the strobe, an optical and acoustical warning will get your attention.

A discharge protection prevents the cells from an uncontrolled discharge. This is indicated by an optical and acoustical alarm.
The transformer is deactivated when the cells are nearly empty, it can however be activated manually for 3-5 more additional frames.
For safety reasons (ascent), the pilot light remains functional for a few minutes.

  Should water enter the housing there is a sensor which immediately detects the smallest amount of moisture. For safety reasons, the condenser is immediately discharged (automatically generating a flash). After this discharge, the pilot light and all red LED lights will blink permanently and an acoustical alarm will sound.