The CT89 series temperature chart recorder sports an advanced microcontroller design that enables it to accurately measure and record temperatures in air, gas, liquids, powders, solids, and semi-solids. It uses a stainless steel, 102-mm probe with a 4.6m cable. Other features include a large LED digital temperature display, three temperature ranges and four chart speeds, a battery back-up, and a polycarbonate case, cover, and handle. Price starts at $345. OMEGA ENGINEERING INC., Stamford, CT. (800) 872-9436.