I need to purchase a RGA for monitoring the gas content to make sure there
is no hydrocarbon contamination.
Also, would like to see water vapor content. That is the 2 major gas I need
to monitor. Maybe there is more but I cannot of think of any. Would someone
recommend a decent RGA to purchase with a reasonable price? And what do I
have to watch out? I have no expereince on this.

thanks
Andrew