Clarke's Industries



Proud USA Company

HT Sensor

HT with Light Guide


  • For pipes up to 79" in diameter.
  • Durable Cast Aluminum Enclosure.
  • Size: L 7-5/8" x W 3-1/8" x H 2-7/8"
  • Voltage:  20VDC
  • Current:  9.85ma
  • Viewing Angle: 90° @ 50% on axis
  • Operating Temp: -40°F to 600°F
  • Spectral Response: 400-1100 nm
  • Sensitivity: 136uW/sr @ 940nm @ 80 cm
  • Effective Sensitive Area: 100 mm^2
  • Enclosure Type: NEMA 4X
  • Two Year Warranty
  • Designed and Assembled in USA

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.

Sensor Brochure

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