Product category:
Humidity and moisture sensing systems
News Release from: Vaisala | Subject: Humicap180R
Edited by the Processingtalk Editorial
Team on 04 December 2007
New Vaisala Humicap relative humidity
sensor
Vaisala has introduced a new generation Vaisala Humicap relative humidity sensor, the Vaisala Humicap180R, which is used in Vaisala industrial humidity transmitters
This new type of capacitive humidity sensor has been developed especially to cope with chemical interference In most humidity measurement applications, the sensors are also exposed to chemicals other than water vapour
This article was originally published on Processingtalk on 4 Apr 2003 at 8.00am (UK)
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Such vapours are present in most environments, even in normal office air.
As the responses to some gases and vapours are very slow, in many cases several weeks or months, the effects are often described as 'drift' or 'aging' of the sensor and not as chemical interference.
The resistance of the Vaisala Humicap180R to chemical interference has been achieved by developing a new type of chemical resistant polymer and a special new structure.
The structure slows down the migration of adverse chemicals, or completely prevents them, from entering the active polymer layer.
The chemical resistant active polymer further contributes to the stability of the sensor, making it the recommended Vaisala sensor for relative humidity measurement.
The new Vaisala Humicap sensor has been tested both in laboratory conditions as well as in typical humidity sensor applications.
The sensors perform better both in laboratory high chemical concentration tests as well as in long-term field stability tests.
The results show that the new polymer makes the sensor highly resistant to chemical interference and therefore provides improved long-term stability for the relative humidity measurement. Request a free brochure from Vaisala ...
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