Example: IRt/c.3X - K - 180F90C
For more information on Temperature Ranges and to help you select the Temperature Range that is right for you, click here.
Adjustable Model IRt/cs
For high temperature applications (> 500F) and low emissivity targets (metals), and specialized optical sensors (small spots and slot spots) See pdf. Also check out technotes 58,59,60,61,66,69,70,73 and 76.