Ortega OHTM Hygro Thermometer Overview:

The Hygro-Thermometer has an advanced high-precision sensor. LCD Display shows Temperature (Celsius or Fahrenheit) and Humidity with an indicator (DRY/OK/WET) to easily keep you aware of acceptable conditions for instrument care. The Hygro-Thermo Monitor can be displayed with a folding table stand, mounted on the wall, and has a convenient magnet on the back.

Features:

• Relative humidity indicator
  
• OK between 45%–55% RH