Home Page | Humidity Measurement with the HygroClip Technology

HygroClip: how it works

HygroClip S plug-in probe

ROTRONIC uses the HygroClip digital technology both in humidity instruments with a fixed (non-removable) probe and in plug-in (removable) probes. Products based on the HygroClip technology include two main subsystems: · ASIC (Application Specific Integrated Circuit): a custom designed chip that measures both the capacitive humidity sensor and the Pt100 RTD and converts the measurements into digital counts. The ASIC includes two D/A converters to convert the data from the micro controller into analog output signals *. The ASIC also regulates all supply voltages and generates the reset and clock signals for the micro controller. * Plug-in probes: analog output signals are provided only with the HygroClip S and S3 probes. All other   HygroClip plug-in probes are strictly digital. · Micro controller / EEPROM: uses the digital counts generated by the ASIC to compute the value of humidity and temperature and returns the data to the ASIC (analog outputs). The micro controller also sends data to, or receives data from, the digital input / output (DIO). Calibration, linearization, temperature compensation and other sensor data are memorized in the EEPROM.