This certified Hygrometer-Thermometer combination is certified to be accurate within ± 3% RH. The dial indicates the complete range of 0 to 100% relative humidity. Each instrument has been tested at three different positions of the dial at temperatures ranging from 32°F to 230°F. The calibration and certification are done under ISO-9001 control. The bi-metallic thermometer on the thermo-hygrometer is accurate to ±1% of scale with a range of 0°F to 210°F.

This is the only humidity indicator that we know of that has a 1-year guarantee and a 5-year warranty. Both the humidity and temperature are directly read without any calculations whatsoever.

Features:

• Bi-metallic thermometer
• Solid 6-inch overall brass case drilled for wall mounting
• Color differentiated 5-inch dial with black letters and numbers and a red pointer
• 1-year guarantee and a 5-year warranty

Specifications:

• Humidity Range: 0 to 100% relative humidity
• Temperature Range: 0°F to 210°F (-20°C to 100°C)
• Accuracy: ±3% RH ; ±1% °F/°C
• Resolution: 1% RH ; 2°F (1°C)
• Shipping weight: 3 pounds