Relative Humidity Sensor (RHS) Moisture Analyzer

Determining Moisture in Plastics by Relative Humidity Sensor
The Computrac Vapor Pro measures water vapor by means of a relative humidity sensor. The sample is placed in a glass vial and placed into an oven that heats the sample. Dry nitrogen gas sweeps the evolved water vapor out of the vial and past a relative humidity sensor.

The sensor is specific to water vapor so other evolved volatiles won’t register as water content (this is different than a gravimetric test). This instrument is comparable to a Karl Fischer type moisture analysis.

Test Methods
ASTM D7191

The Instrument is great for accurately determining the %moisture of polymer samples. It can also be used as a means to verify the accuracy of gravimetric moisture analyzers which are more commonly used in production environments.

To learn more about Teel Analytical Laboratories, and the testing services we can provide for you, please call 608-355-4626.