REED Hanging Hygrometers
• Measures relative humidity by comparing readings of wet bulb and dry bulb thermometers 
• Accuracy obtained by creating rapid air circulation around bulbs • Non-mercury red spirit filled thermometers 
• Range: -10 to 130 °F (-5 to 50 °C) • Plastic moulded case • Plastic reservoir • Dimensions: 4" x 10"