The PyroGuard HT sensor is designed to be isolated from either a High Temperature or High Pressure duct by using either a Clarke's PyroGuard Light Guide or Fiber Optic Polyp. The Light Guide or Polyp assemblies transfer the light from a spark in the pipe to the HT sensor.
The PyroGuard HT is sold with a Clarke's PyroGuard Light Guide as a standard feature due to the increased sensitivity of a Light Guide compared to a Fiber Optic Polyp. Mounting brackets and adapters are used with the HT sensor for mounting to the high temperature/high pressure ducts.
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