Meaning
Atmospheric measurement systems track the specific temperature at which gas-borne moisture begins to condense into liquid. Implementing dew point monitoring within a drying system provides a direct measurement of air dryness, independent of the air temperature. This metric is used to verify that desiccant systems are functioning correctly before material is processed.
A rise in the dew point often signals a leak in the system or the saturation of the drying agent.
Saturation Level
Air with a low dew point has a higher capacity to absorb moisture from the surrounding material. Effective dew point monitoring ensures that the air used in industrial dryers remains at or below minus forty degrees. If the level rises, the drying efficiency drops and the risk of part defects increases.
Humidity Control
Continuous data collection allows for automated switching between desiccant beds to maintain a steady state. Relying on dew point monitoring prevents the system from using wet air during the regeneration cycle of the drying tanks. This level of control is necessary for high-performance polymers that are sensitive to even small amounts of water.
Sensor Placement
Accurate readings depend on the location of the probe within the airflow circuit. Dew point monitoring should occur at the inlet of the drying hopper to confirm the condition of the air reaching the material. Sensors must be calibrated regularly to ensure the data remains defensible during quality audits.
