Clarke's Industries



Proud USA Company

Test Lights

THT and TLP Test Lights


  • Available in HT & LP applications.
  • 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:  12 or 24VDC
  • Current:  100ma
  • Viewing Angle: 40° @ 50% on axis
  • Operating Temp: -40°F to 140°F
  • Spectral Output: 880 nm
  • Sensitivity minimum: 18mW
  • Enclosure Type: NEMA 4X
  • Two Year Warranty
  • Designed and Assembled in USA

PyroGuard External Test Lights are optional equipment for the Clarke's Spark Detection and Suppression System. They are designed for through lens testing of the sensors instead of the standard option of internal testing.

With a test light not only are you performing an internal test of the sensor but also an external test to determine whether or not the sensor lens cover is blocked by excessive material build up. They are available for both low pressure and high pressure/high temperature applications.

Sensor Brochure

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