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Sensors per duct:
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Two (2) for pipes up to 79" in diameter
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Voltage:
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20 VDC
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Current Draw:
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10 ma
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Type of Wire:
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Non-Shielded, stranded 12-18 gauge
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Size:
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L 7-5/8" x W 3-1/8" x H 2-7/8"
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Viewing Angle with Light Guide:
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110°
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Viewing Angle with Fiber Optic Polyp:
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82° x 3 legs
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Sensitivity with Light Guide:
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Source Power = 136 uW
Spark Distance From Sensor = 80 centimeters
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Sensitivity with Fiber Optic Polyp:
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Source Power = 136 uW
Spark Distance From Sensor = 60 centimeters
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Temperature Range with Light Guide:
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Up to 600°F
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Temperature Range with Fiber Optic Polyp:
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Up to 450°F
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Wave Length:
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400-1100 nm, peak 940 nm
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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. Below is technical data for an HT sensor with a Clarke's PyroGuard Light Guide and a Fiber
Optic Polyp showing the difference in viewing angle and sensitivity.