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The perfect choice for applications when multiple temperature measurements are needed. Features include: LCD backlight for dark environments; sealed keypad which protects the instrument from spills and dust; and a battery eliminator jack. It simultaneously measures suction and liquid line temperatures, temperatures across condensing coils, evaporator coils and ambient temperatures. View temperature differential between zones 1 and 2 and review min / max temperatures from all three zones. The SH66A-E does NOT include probes.