Extech RH490-NIST Precision Hygro-Thermometer with NIST Traceable Certificate
Highest 2% RH accuracy with Grains Per Pound (GPP) Display. Includes NIST Traceable Calibration.
Specifications:
| Humidity | 0 to 100%RH |
| Temperature (internal) | -4 to 199°F (-20 to 100°C) |
| Basic Accuracy | ±2%RH ±1.8°F/1°C |
| Max. Resolution | 0.1%RH 0.1°F/°C |
| Dewpoint | -22 to 199°F (-30 to 100°C) |
| Wet Bulb | 32 to 176 °F (0 to 80°C) |
| Absolute Humidity | 0 to 1120GPP (0 to 160g/kg) |
| Dimensions | 7.8x1.7x1.3" (200x45x33mm) |
| Weight | 7oz (200g) |
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