Our products

Our interlock products are customized
to your unique safety needs

Type TDKRU Interlock

Isolation interlock

TDKRU stands for Time Delay Key Release Unit, and protects against scenarios where hazardous energy needs time to neutralize. The TDKRU is comprised of two key interlocks, a timing device, a solenoid, and a signal light for indication.

The Type TDKRU is available in both SD and HD series.

For further technical information please refer to the datasheet.


  • Key actuated time delay
  • Optional protective covers
  • Available in SD (Brass) and HD (316 Stainless steel)

Typical application


Perimeter guarding

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