225-569 Psychrometric Slide Rule 
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| 225-569 Pocket Psychrometric Slide Rule |
The 225-569 Pocket Psychrometric Slide Rule quickly converts wet-bulb and dry-bulb temperatures to relative humidity. The user simply lines up the two temperatures and reads relative humidity directly. The RH scale ranges from 10% to 100% with graduations of 2%. Values to 1% RH may be estimated. Two models are available. The 225-569F Slide Rule has a temperature scale of 20° to 100°F, and the 225-569C has a scale of ‑5° to 50°C. Both are small, lightweight, and durable.
Specifications
Scale:
225-569C: -6° to +49°C (1°)
225-569F: +20° to +120°F (.5°; 1° from 100-120°)
Size: 7" L x 1.4" W (178 mm x 36 mm)
Weight: 0.5 oz (14 g)
Ordering Information
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Temperature & Humidity Sensors
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