Full definition
Temperature at which water vapor in compressed air condenses into liquid. Indicates drying quality. Values by application: +3°C (refrigerated drying), -20°C (basic instrumentation), -40°C (sensitive processes), -70°C (pharmaceutical/electronics). Measurement: capacitive hygrometer (accuracy ±2°C). Dew point ≤-40°C corresponds to ≤5 ppm water by volume. Standard ISO 8573-1 classes 1-4.