Product Name:
247-01 Cobalt Blue Furnace Observation Filter
Standards: ANSI Z87.1, EN 171
Material: Glass
Size: (Round) Diameter 50 mm

Category: Tag:



  • Best optical quality
    To give users the best vision so that they can focus on the job, the faceshield has the highest optical properties (Class 1) in tests of spherical refractive power, astigmatic refractive power, prismatic refractive power, and light diffusion.
  • Superb UV protection
    We used advanced technologies to provide the user with superb protection against UV.
  • Superb IR protection
    Advanced technologies were employed to provide users with superb protection against IR.
  • Resistance to ignition
    According to the testing method of European standard, heat one end of a steel rod, 300 mm long and 6 mm nominal diameter to 650 ℃. Press the heated face of the rod against the surface of the sample for 5 seconds. The faceshield shall not ignite nor continue to glow.
  • Furnace observation
    It is designed with the furnace observer in mind, and it allows those who are observing hot furnaces to see into the furnace so they can reduce eye fatigue and increase their vision of the items in the furnace.

Additional information

Item No.


Product Name

Cobalt Blue Furnace Observation Filter


ANSI Z87.1
EN 171





Scale number for filters

4-6 (EN 171)
U6, R10 (ANSI Z87.1)

Lens size

(Round) Diameter 50 mm