CALL; A.WIHARTA 081294124885 085778084789 087784022201   Info Produk The Extech RH490 Precision Psychrometer has the highest accuracy with a fast 30 second response time and also measures Grains Per Pound grams per kilogram up to 1120GPP 160g kg . This model is basically the same with the upgrade of GPP measurement. Uses a dual display that simultaneously shows humidity temperature humidity dew point or humidity wet bulb. The slim design with rubberized sides allows for a better grip and easy one hand operation. Comes complete with a carrying case and a 9 V battery. Specifications Sensor Type Capacitance Dew Point 22 to 199F 30 to 100C Wet Bulb 32 to 176F 0 to 80C Humidity 0 to 100 RH 0.1 RH resolution 2 RH accuracy Temperature Internal 22 to 199F 30 to 100C 0.1F C resolution 1.8F 1C Dimensions 7.8 x1.7 x1.3 200x45x33mm Weight 7oz 200g CE Yes Warranty 1 year