The WT323B extends the WT323 color-screen thermometer line to a wider -50C to 850C range, still with a 12:1 distance-to-spot ratio and adjustable emissivity for accurate readings on reflective or dull surfaces alike. It adds a K-type thermocouple input for direct contact measurement between 0C and 250C, giving it both non-contact and contact temperature-checking in one handheld unit.