Intrinsically Safe Barriers

Intrinsically Safe Barriers
Intrinsically Safe Barriers
Intrinsically safe barriers are components that prevent instruments and low voltage circuits from releasing sufficient energy to ignite volatile gases in a hazardous area.

The barrier is designed to separate the control circuit from the field device. A combination of resistors, diodes and fuses work in tandem to prevent excess voltage and current from reaching the field device under fault conditions.

Intrinsically safe barriers are differentiated by voltage and current ratings, and hazardous location classification.

Zener Barrier Series Image
  • Lower-power switching
  • Completely encapsulated construction
  • Modular housings for easier installation
These passive, energy-limiting devices provide intrinsically safe DC outputs for a variety of sensors such as level and flow switches...level indicating transducers and transmitters…and many others. The maximum energy possible at the switch terminals of the SAFE-PAK and Zener Barriers is far below the explosive point of the most volatile surrounding gas conditions. The type of non-voltage producing switch or sensor best suited for the application can be utilized, since the entire switching circuit is rendered intrinsically safe by the SAFE-PAK or Zener Barrier. As the switching circuit is low voltage, there is no shock hazard to operating or maintenance personnel.
  • Solid-state reliability
  • Consistent performance
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