Check-It 602 Service* Engineer Pyrometer Set F*S

I bought this from Grainger in 1991, I guess since I haven't used it for 25 years I'll let it go!
Measures from -100° to 1999°F, the large backlighted 0.5 inch high liquid crystal display is easy to read, even in dark areas. Includes all manuals and certifications, is in like new condition. It comes with two interchangeable probes, carrying case and 9V battery. The Check-It 0199 Air Probe yields exceptionally fast readings when used to measure gas and air temperatures. Cross-drilled stainless tube protects the .005" sensor. For measuring room, air conditioner and heater, furnace exhaust stack temperatures and calibrating thermostats. The Check-it 0200 needle probe is an extremely fast responding sensor. When inserted into any object the response time is practically instantaneous. For measuring temperatures of pipes, insulated lines, steam traps, manifolds, radiators, etc.