Psychrometer & Slide Charts

The Psychrometer Slide Charts offer a quick and efficient way to determine relative humidity using dry and wet bulb temperature readings. Simply slide the chart to match the measured temperatures, and directly read humidity or dew point values. Compact, low-cost, and maintenance-free, these charts are perfect for HVAC technicians, environmental monitoring, and educational use—particularly when power sources or digital tools aren’t available.

Key Features:

Enables humidity or dew point calculation from two temperatures

Lightweight and portable design

No power required ideal for field use

Durable and simple slide-action interface

Low-cost hygrometry solution

Great for HVAC, education, and environmental monitoring

Long-lasting, easy to read format