Mark E

Mark E 
  The Mark E is a simple electronic load limiter,
  with one set point, for load cells with a
  4-20 mA output.
  The advantage of such a system is that the
  distance between the load cell and the
  Mark E is not restricted and can easily be 100

  The Mark E is easy to mount on a DIN-rail.

It can be calibrated with a test load which is smaller than the overload weight (normally 110% of the nominal load).

The built-in time delay and signal filter make sure that dynamic effects are not considered as overload, while the hysteresis function avoids unwanted activation of the overload relay due to dynamic effects
while close to the set point.