DRYCAP® technology - DMP5 - DMP6 - DMP7 - DMP8 - DMPX

DMP Series User Guide

Document code
M212357EN
Revision
D
Language
English
Product
DMP5
DMP6
DMP7
DMP8
DMPX
Document type
User guide

Vaisala DRYCAP® dew point measurement technology ensures accurate measurement with excellent long term stability. Its unrivalled performance is based on two innovations: the proven capacitive thin-film polymer sensor and the self-diagnostic functions that the software performs automatically as needed.

The sensor’s thin-film polymer absorbs or releases water vapor as the surrounding humidity increases or decreases. The dielectric properties of the polymer change as the humidity around the sensor changes, as does the capacitance of the sensor. Capacitance is converted into a humidity reading. The capacitive polymer sensor is bonded together with a temperature sensor, and dew point is calculated from the humidity and temperature readings.

The automatic sensor functions are called autocalibration, sensor purge, and sensor warming. They are a key element in achieving the stability, rapid response time, and condensation resistance of the DRYCAP® sensors.