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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
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