Traceable® dial hygrometer/thermometer provides humidity and temperature readings in an easy-to-read dial format. It is ideal for constantly monitoring labs, fume hoods, walk-ins, plant areas, and storage facilities. Large, analog readout displays. No maintenance required. Self-contained, stable, accurate unit requires no adjustment, maintenance, or battery. Complete with screw for wall mounting. Humidity Range: 0 to 100%. Temperature Range: -40 to 122°F; -40 to 50°C. Humidity Resolution: 1%RH. Temperature Resolution: 1°. Humidity Accuracy: ±2.5%RH at 50%RH. Temperature Accuracy: ±1.5°C. Dimensions (Diameter x Length): 6 x 1-Inch. Weight: 8oz. Control Company #: 4186.