... (-58 to 2,102°F) IR-862: -50 to 1,350°C (-58 to 2,462°F) IR-863: -50 to 1,650°C ... (-58 to 3,002°F) IR-865: -50 to 1,850°C ... (-58 to 3,362°F) IR-866:-50 to 2,250°C ... 58 to 2,102°F) IR-862: -50 to 1,350°C (-58 to 2,462°F) IR-863: -50 to 1,650°C ... (-58 to 3,002°F) IR-865: -50 to 1,850°C ...