[Dsg-rich] PPM humidity sensor for RICH

[Tyler Lemon]

Hello Marco Mirazita, 

This is to inform you that we have a spare hygrometer that measures the dewpoint or concentration of water in air. 

We have the sensor on hand, but we still need the read-out instrumentation. Marc has gone to Hall B to get the read-out instrumentation that we could use. 

We will have to convert the output of the sensor, in dewpoint or ppm, to relative humidity to be able to compare the hygrometer measurements to the interlock humidity sensors. 

Best regards, 
Tyler 
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