DMP5 integrates accurate, reliable and stable Vaisala DRYCAP? The sensor. The sensor is resistant to condensation and is not affected by particulate pollution, oil vapors and most chemicals. The temperature of the sensor can greatly reduce the risk of condensation on the sensor. What if DRYCAP? When the sensor gets wet, it dries quickly and restores its fast response time. In low humidity conditions, the sensor will be automatically calibrated to ensure accurate measurement.