4 in1 Humidity, Temperature Light and Anemometer 850070 For environmental testing anywhere. Combines a light meter, humidity meter, thermometer and anemometer into a single compact unit weighing only 5½ oz (160 g). Own the equivalent of 4 meters for about the price of any one of them. Features touch-tone buttons, zero adjustment, max-min and hold functions. Comes ready to use with wrist strap, instructions, 9V battery, and soft carrying case Dim: 6” x 2½” x 1” (150 x 65 x 30 mm). Fan Diameter: 1½" (38mm) Specifications Range Resolution Accuracy ºC ambient 0 ~ 50 0.1 ±1.2ºC ºF ambient 32 ~122 ±2.5ºF ºC Type K -100 ~ 1300 ±(1% + 1ºC) ºF Type K -148 ~ 2372 ±(1% + 2ºF) RH 10 ~ 95% ±6% 30 ~ 60RH otherwise ±8% Airspeed m/s 0.4 ~ 25.0 ±(3% + 2d) Airspeed km/h 1.4 ~ 90.0 Airspeed mile/h 0.9 ~ 55.9 Airspeed knots 0.8 ~ 48.6 Airspeed ft/min 80 ~ 4930 1 ±(3% + 20ft/min) Lux 0 ~ 20,000 ±(5% + 4d) Foot Candle 0 ~ 2,000 0.1 850070 Anemometer Humidity Lux meter SPER Scientific Temperature Thermo-Hygrometer ÇÑ´ËÅÒ¤èÒã¹à¤Ã×èͧà´ÕÂÇ à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ à¤Ã×èͧÇÑ´»ÃÔÁÒµÃÅÁ à¤Ã×èͧÇÑ´ÍѵÃÒ¡ÒÃäËÅ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ-¤ÇÒÁª×é¹ à¤Ã×èͧÇÑ´áʧ Ẻ¾¡¾Ò Ẻ㺾Ѵ