Cooper-Atkins TRH122M-0-8 Digital Mini Temperature/Humidity Dual-Display Wall Thermometer, 14/122° F Temperature Range Review Posted: July 23, 2018 Under: Instant-Read Thermometers and Timers By Starfishht no Comments The TRH122M measures both temperature and %Relative Humidity. It features Min/Max memory and switchable F/C.